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Cosmos

Join our discussion now

The universe of algorithm and data structures

Cosmos is your personal offline collection of every algorithm and data structure one will ever encounter and use in a lifetime. This provides solutions in various languages spanning C, C++, Java, JavaScript, Swift, Python, Go and others.

This work is maintained by a community of hundreds of people and is a massive collaborative effort to bring the readily available coding knowledge offline.

Many coders ask me how to improve their own performances. I cannot say anything except "solve and review and prepare your library" - Uwi Tenpen

Cosmic Structure

Following is the high-level structure of cosmos:

Each type has several hundreds of problems with solutions in several languages spanning C, C++, Java, Python, Go and others.

Maintainers

This is a massive collaboration and to keep the quality intact and drive the vision in the proper direction, we have maintainers.

Maintainers are your friends forever. They are vastly different from moderators.

Currently, we have 5 active maintainers and we are expanding quickly.

The task of maintainers is to review pull requests, suggest further quality additions and keep the work up to date with the current state of the world. 🌍

Check out our current maintainers

Let us know if you would like to be a maintainer in the Slack channel #algorithms and we will review and add you upon subsequent contributions. To join our massive community at Slack open an issue here.

Contributors

The success of our vision to bring knowledge offline depends on you. Even a small contribution helps. All forms of contributions are highly welcomed and valued.

Currently, we have over 700 contributors

When you contribute, your name with a link (if available) is added to our contributors list.

You can contribute by writing code, documentation in the form of installation guides and style guides, making Cosmos search friendly and many others. There are endless possibilities.

Additionally, you might want to take a look at this contributing guidelines before you make Cosmos better.

You may, also, refer to the available style guides before contributing code.

License

We believe in freedom and improvement. GNU General Public License v3.0

About

[Show ❤️ love by 🌟] Your personal library of every algorithm and data structure code that you will ever encounter

Resources

Readme
GPL-3.0 license

Code of conduct

Code of conduct

Contributing

Contributing
Activity

Stars

1 star

Watchers

1 watching

Forks

0 forks
Report repository

Releases

Packages

Contributors

Languages

, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
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Cosmos
Join our discussion now
The universe of algorithm and data structures
Cosmos is your personal offline collection of every algorithm and data structure one will ever encounter and use in a lifetime. This provides solutions in various languages spanning C, C++, Java, JavaScript, Swift, Python, Go and others.
This work is maintained by a community of hundreds of people and is a massive collaborative effort to bring the readily available coding knowledge offline.
Many coders ask me how to improve their own performances. I cannot say anything except "solve and review and prepare your library" - Uwi Tenpen
Cosmic Structure
Following is the high-level structure of cosmos:
Each type has several hundreds of problems with solutions in several languages spanning C, C++, Java, Python, Go and others.
Maintainers
This is a massive collaboration and to keep the quality intact and drive the vision in the proper direction, we have maintainers.
Maintainers are your friends forever. They are vastly different from moderators.
Currently, we have 5 active maintainers and we are expanding quickly.
The task of maintainers is to review pull requests, suggest further quality additions and keep the work up to date with the current state of the world. 🌍
Check out our current maintainers
Let us know if you would like to be a maintainer in the Slack channel #algorithms and we will review and add you upon subsequent contributions. To join our massive community at Slack open an issue here.
Contributors
The success of our vision to bring knowledge offline depends on you. Even a small contribution helps. All forms of contributions are highly welcomed and valued.
Currently, we have over 700 contributors
When you contribute, your name with a link (if available) is added to our contributors list.
You can contribute by writing code, documentation in the form of installation guides and style guides, making Cosmos search friendly and many others. There are endless possibilities.
Additionally, you might want to take a look at this contributing guidelines before you make Cosmos better.
You may, also, refer to the available style guides before contributing code.
License
We believe in freedom and improvement. GNU General Public License v3.0
About
 [Show ❤️ love by 🌟] Your personal library of every algorithm and data structure code that you will ever encounter
Resources
Readme
GPL-3.0 license
Code of conduct
Code of conduct
Contributing
Contributing
Activity
Stars
1 star
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
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Cosmos
Join our discussion now
The universe of algorithm and data structures
Cosmos is your personal offline collection of every algorithm and data structure one will ever encounter and use in a lifetime. This provides solutions in various languages spanning C, C++, Java, JavaScript, Swift, Python, Go and others.
This work is maintained by a community of hundreds of people and is a massive collaborative effort to bring the readily available coding knowledge offline.
Many coders ask me how to improve their own performances. I cannot say anything except "solve and review and prepare your library" - Uwi Tenpen
Cosmic Structure
Following is the high-level structure of cosmos:
Each type has several hundreds of problems with solutions in several languages spanning C, C++, Java, Python, Go and others.
Maintainers
This is a massive collaboration and to keep the quality intact and drive the vision in the proper direction, we have maintainers.
Maintainers are your friends forever. They are vastly different from moderators.
Currently, we have 5 active maintainers and we are expanding quickly.
The task of maintainers is to review pull requests, suggest further quality additions and keep the work up to date with the current state of the world. 🌍
Check out our current maintainers
Let us know if you would like to be a maintainer in the Slack channel #algorithms and we will review and add you upon subsequent contributions. To join our massive community at Slack open an issue here.
Contributors
The success of our vision to bring knowledge offline depends on you. Even a small contribution helps. All forms of contributions are highly welcomed and valued.
Currently, we have over 700 contributors
When you contribute, your name with a link (if available) is added to our contributors list.
You can contribute by writing code, documentation in the form of installation guides and style guides, making Cosmos search friendly and many others. There are endless possibilities.
Additionally, you might want to take a look at this contributing guidelines before you make Cosmos better.
You may, also, refer to the available style guides before contributing code.
License
We believe in freedom and improvement. GNU General Public License v3.0
About
 [Show ❤️ love by 🌟] Your personal library of every algorithm and data structure code that you will ever encounter
Resources
Readme
GPL-3.0 license
Code of conduct
Code of conduct
Contributing
Contributing
Activity
Stars
1 star
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Cosmos
Join our discussion now
The universe of algorithm and data structures
Cosmos is your personal offline collection of every algorithm and data structure one will ever encounter and use in a lifetime. This provides solutions in various languages spanning C, C++, Java, JavaScript, Swift, Python, Go and others.
This work is maintained by a community of hundreds of people and is a massive collaborative effort to bring the readily available coding knowledge offline.
Many coders ask me how to improve their own performances. I cannot say anything except "solve and review and prepare your library" - Uwi Tenpen
Cosmic Structure
Following is the high-level structure of cosmos:
Each type has several hundreds of problems with solutions in several languages spanning C, C++, Java, Python, Go and others.
Maintainers
This is a massive collaboration and to keep the quality intact and drive the vision in the proper direction, we have maintainers.
Maintainers are your friends forever. They are vastly different from moderators.
Currently, we have 5 active maintainers and we are expanding quickly.
The task of maintainers is to review pull requests, suggest further quality additions and keep the work up to date with the current state of the world. 🌍
Check out our current maintainers
Let us know if you would like to be a maintainer in the Slack channel #algorithms and we will review and add you upon subsequent contributions. To join our massive community at Slack open an issue here.
Contributors
The success of our vision to bring knowledge offline depends on you. Even a small contribution helps. All forms of contributions are highly welcomed and valued.
Currently, we have over 700 contributors
When you contribute, your name with a link (if available) is added to our contributors list.
You can contribute by writing code, documentation in the form of installation guides and style guides, making Cosmos search friendly and many others. There are endless possibilities.
Additionally, you might want to take a look at this contributing guidelines before you make Cosmos better.
You may, also, refer to the available style guides before contributing code.
License
We believe in freedom and improvement. GNU General Public License v3.0
About
 [Show ❤️ love by 🌟] Your personal library of every algorithm and data structure code that you will ever encounter
Resources
Readme
GPL-3.0 license
Code of conduct
Code of conduct
Contributing
Contributing
Activity
Stars
1 star
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
BranchesTags
Repository files navigation
Cosmos
Join our discussion now
The universe of algorithm and data structures
Cosmos is your personal offline collection of every algorithm and data structure one will ever encounter and use in a lifetime. This provides solutions in various languages spanning C, C++, Java, JavaScript, Swift, Python, Go and others.
This work is maintained by a community of hundreds of people and is a massive collaborative effort to bring the readily available coding knowledge offline.
Many coders ask me how to improve their own performances. I cannot say anything except "solve and review and prepare your library" - Uwi Tenpen
Cosmic Structure
Following is the high-level structure of cosmos:
Each type has several hundreds of problems with solutions in several languages spanning C, C++, Java, Python, Go and others.
Maintainers
This is a massive collaboration and to keep the quality intact and drive the vision in the proper direction, we have maintainers.
Maintainers are your friends forever. They are vastly different from moderators.
Currently, we have 5 active maintainers and we are expanding quickly.
The task of maintainers is to review pull requests, suggest further quality additions and keep the work up to date with the current state of the world. 🌍
Check out our current maintainers
Let us know if you would like to be a maintainer in the Slack channel #algorithms and we will review and add you upon subsequent contributions. To join our massive community at Slack open an issue here.
Contributors
The success of our vision to bring knowledge offline depends on you. Even a small contribution helps. All forms of contributions are highly welcomed and valued.
Currently, we have over 700 contributors
When you contribute, your name with a link (if available) is added to our contributors list.
You can contribute by writing code, documentation in the form of installation guides and style guides, making Cosmos search friendly and many others. There are endless possibilities.
Additionally, you might want to take a look at this contributing guidelines before you make Cosmos better.
You may, also, refer to the available style guides before contributing code.
License
We believe in freedom and improvement. GNU General Public License v3.0
About
 [Show ❤️ love by 🌟] Your personal library of every algorithm and data structure code that you will ever encounter
Resources
Readme
GPL-3.0 license
Code of conduct
Code of conduct
Contributing
Contributing
Activity
Stars
1 star
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Cosmos
Join our discussion now
The universe of algorithm and data structures
Cosmos is your personal offline collection of every algorithm and data structure one will ever encounter and use in a lifetime. This provides solutions in various languages spanning C, C++, Java, JavaScript, Swift, Python, Go and others.
This work is maintained by a community of hundreds of people and is a massive collaborative effort to bring the readily available coding knowledge offline.
Many coders ask me how to improve their own performances. I cannot say anything except "solve and review and prepare your library" - Uwi Tenpen
Cosmic Structure
Following is the high-level structure of cosmos:
Each type has several hundreds of problems with solutions in several languages spanning C, C++, Java, Python, Go and others.
Maintainers
This is a massive collaboration and to keep the quality intact and drive the vision in the proper direction, we have maintainers.
Maintainers are your friends forever. They are vastly different from moderators.
Currently, we have 5 active maintainers and we are expanding quickly.
The task of maintainers is to review pull requests, suggest further quality additions and keep the work up to date with the current state of the world. 🌍
Check out our current maintainers
Let us know if you would like to be a maintainer in the Slack channel #algorithms and we will review and add you upon subsequent contributions. To join our massive community at Slack open an issue here.
Contributors
The success of our vision to bring knowledge offline depends on you. Even a small contribution helps. All forms of contributions are highly welcomed and valued.
Currently, we have over 700 contributors
When you contribute, your name with a link (if available) is added to our contributors list.
You can contribute by writing code, documentation in the form of installation guides and style guides, making Cosmos search friendly and many others. There are endless possibilities.
Additionally, you might want to take a look at this contributing guidelines before you make Cosmos better.
You may, also, refer to the available style guides before contributing code.
License
We believe in freedom and improvement. GNU General Public License v3.0
About
 [Show ❤️ love by 🌟] Your personal library of every algorithm and data structure code that you will ever encounter
Resources
Readme
GPL-3.0 license
Code of conduct
Code of conduct
Contributing
Contributing
Activity
Stars
1 star
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Cosmos
Join our discussion now
The universe of algorithm and data structures
Cosmos is your personal offline collection of every algorithm and data structure one will ever encounter and use in a lifetime. This provides solutions in various languages spanning C, C++, Java, JavaScript, Swift, Python, Go and others.
This work is maintained by a community of hundreds of people and is a massive collaborative effort to bring the readily available coding knowledge offline.
Many coders ask me how to improve their own performances. I cannot say anything except "solve and review and prepare your library" - Uwi Tenpen
Cosmic Structure
Following is the high-level structure of cosmos:
Each type has several hundreds of problems with solutions in several languages spanning C, C++, Java, Python, Go and others.
Maintainers
This is a massive collaboration and to keep the quality intact and drive the vision in the proper direction, we have maintainers.
Maintainers are your friends forever. They are vastly different from moderators.
Currently, we have 5 active maintainers and we are expanding quickly.
The task of maintainers is to review pull requests, suggest further quality additions and keep the work up to date with the current state of the world. 🌍
Check out our current maintainers
Let us know if you would like to be a maintainer in the Slack channel #algorithms and we will review and add you upon subsequent contributions. To join our massive community at Slack open an issue here.
Contributors
The success of our vision to bring knowledge offline depends on you. Even a small contribution helps. All forms of contributions are highly welcomed and valued.
Currently, we have over 700 contributors
When you contribute, your name with a link (if available) is added to our contributors list.
You can contribute by writing code, documentation in the form of installation guides and style guides, making Cosmos search friendly and many others. There are endless possibilities.
Additionally, you might want to take a look at this contributing guidelines before you make Cosmos better.
You may, also, refer to the available style guides before contributing code.
License
We believe in freedom and improvement. GNU General Public License v3.0
About
 [Show ❤️ love by 🌟] Your personal library of every algorithm and data structure code that you will ever encounter
Resources
Readme
GPL-3.0 license
Code of conduct
Code of conduct
Contributing
Contributing
Activity
Stars
1 star
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

Skip to content
BranchesTags
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Cosmos
Join our discussion now
The universe of algorithm and data structures
Cosmos is your personal offline collection of every algorithm and data structure one will ever encounter and use in a lifetime. This provides solutions in various languages spanning C, C++, Java, JavaScript, Swift, Python, Go and others.
This work is maintained by a community of hundreds of people and is a massive collaborative effort to bring the readily available coding knowledge offline.
Many coders ask me how to improve their own performances. I cannot say anything except "solve and review and prepare your library" - Uwi Tenpen
Cosmic Structure
Following is the high-level structure of cosmos:
Each type has several hundreds of problems with solutions in several languages spanning C, C++, Java, Python, Go and others.
Maintainers
This is a massive collaboration and to keep the quality intact and drive the vision in the proper direction, we have maintainers.
Maintainers are your friends forever. They are vastly different from moderators.
Currently, we have 5 active maintainers and we are expanding quickly.
The task of maintainers is to review pull requests, suggest further quality additions and keep the work up to date with the current state of the world. 🌍
Check out our current maintainers
Let us know if you would like to be a maintainer in the Slack channel #algorithms and we will review and add you upon subsequent contributions. To join our massive community at Slack open an issue here.
Contributors
The success of our vision to bring knowledge offline depends on you. Even a small contribution helps. All forms of contributions are highly welcomed and valued.
Currently, we have over 700 contributors
When you contribute, your name with a link (if available) is added to our contributors list.
You can contribute by writing code, documentation in the form of installation guides and style guides, making Cosmos search friendly and many others. There are endless possibilities.
Additionally, you might want to take a look at this contributing guidelines before you make Cosmos better.
You may, also, refer to the available style guides before contributing code.
License
We believe in freedom and improvement. GNU General Public License v3.0
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 [Show ❤️ love by 🌟] Your personal library of every algorithm and data structure code that you will ever encounter
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