java.codes/ThreeSum.java at main · Sarvesh2005-code/java.codes · GitHub

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packagecom.sarvesh.javabasics;
importjava.util.*;

publicclassThreeSum {

publicstaticvoidmain(String[] args) {
Scannersc = newScanner(System.in);
System.out.print("Enter number of elements: ");
intn = sc.nextInt();

int[] arr = newint[n];
System.out.println("Enter elements:");
for(inti = 0; i < n; i++) {
arr[i] = sc.nextInt();
 }
Arrays.sort(arr);
for(inti = 0; i < n - 2; i++) {
if(i > 0 && arr[i] == arr[i - 1]) continue;
intleft = i + 1;
intright = n - 1;
while(left < right) {
intsum = arr[i] + arr[left] + arr[right];
if(sum == 0) {
System.out.println(arr[i] + " " + arr[left] + " " + arr[right]);
while(left < right && arr[left] == arr[left + 1]) left++;
while(left < right && arr[right] == arr[right - 1]) right--;
left++;
right--;
 } elseif(sum < 0) {
left++;
 } else {
right--;
 }
 }
 }
sc.close();
 }
}