topcoder/CuttingBitString.cpp at master · arshdeep/topcoder · GitHub

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#include<iostream>
#include<cstdio>
#include<vector>
#include<cassert>
#include<sstream>
#include<set>
#include<unordered_map>
#include<map>
#include<algorithm>
#include<time.h>
#include<stdlib.h>
#include<regex>
usingnamespacestd;
/* http://community.topcoder.com/stat?c=problem_statement&pm=12155 */
#defineSIZEOFARRAY(s) sizeof(s)/sizeof(s[0])
#defineREP(i,n) for(int i=0;i<(n);++i)
#defineLOOP(i,v,n) for(i=v;i<(n);++i)
#defineLLlonglong
#definememSet(m, v) memset(m, v, sizeof(m))

classCuttingBitString
{
	map<string, int> memo;
boolcheck(string sub)
	{
if (sub[0] == '0') return0;
longlong num = 1;
for (int idx = 1, len = sub.length(); idx < len; ++idx)
 {
 num <<= 1;
if (sub[idx] == '1')
 num |= 1;
 }

while (num % 5 == 0)
 num /= 5;

return num == 1;
	}
public:
intgetmin(string S)
	{
 map<string, int>::iterator itr = memo.find(S);

if (itr != memo.end())
return itr->second;
int res = INT_MAX;
for (int idx = 0, len = S.length(); idx < len; ++idx)
 {
int tmp = 0;
if ( check(S.substr(0, idx + 1)) && ( (idx + 1) == len || S[idx + 1] == '1' ) )
 {
 string str = S.substr(idx + 1, len - idx - 1);
int min = getmin(str);

if (str.length() == 0)
 tmp = 1;
elseif (min != -1)
 tmp += min + 1;
 }

if (tmp > 0)
 res = std::min(tmp, res);
 }
 res = res == INT_MAX ? -1 : res;
 memo.insert(make_pair(S, res));
return res;
	}
};

voidTEST(string s, int expected)
{
clock_t start, end;
double cpu_time_used;

	start = clock();
	CuttingBitString cuttingBitString;
int result = cuttingBitString.getmin(s);
assert( expected == result );

	end = clock();
	cpu_time_used = ((double)(end - start));
	cout << "Time taken : " << cpu_time_used << endl;
}

template <classT>
vector<T> convert(T *list, int n)
{
	vector<T> ret;

for (int i = 0; i< n; ++i)
	{
 ret.push_back(list[i]);
	}

return ret;
}

voidTest1()
{
TEST("101101101", 3 );
TEST("1111101", 1 );
TEST("00000", -1 );
TEST("110011011", 3 );
TEST("1000101011", -1 );
TEST("111011100110101100101110111", 5 );
TEST("11111011111101111111011111101111111111111101111111", 20 );
TEST("101101101101101101101101101101101101101101101101", 16 );
TEST("00010111001110100000101101001100010011111111100110", -1 );
TEST("000001111101", -1 );
TEST("1011111011011111011011111011011111011011111011111", 29 );
TEST("111101000010011001010100000010111110011", 3 );
TEST("101110011100011001110001111110110011100011111101", 7 );
TEST("100010101100011100100011000001001000100111101", 1 );
TEST("10111010010000111011011101", 1 );
TEST("1101100011010111001001101011011100010111011110101", 1 );
}

voidTest2()
{
}

voidTest3()
{
}

voidTest4()
{
}

voidTest5()
{
}

voidTest6()
{
}

voidTest7()
{
}

voidTest8()
{
}

voidTest9()
{
}

voidTest10()
{
}

intmain()
{
Test1();
Test2();
Test3();
Test4();
Test5();
Test6();
Test7();
Test8();
Test9();
Test10();

	cout << "success";
getchar();
return0;
}