Merkkijono

input/code.cpp: In function 'int main()':
input/code.cpp:14:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i = 0; i<str.length();i++)
                                     ^

#include <iostream>
#include <string>

using namespace std;

int main()
{
    string str = "";
    cin >> str;
    while(true)
    {
        string str2 = "";
        int f = 0;
        for(int i = 0; i<str.length();i++)
        {
            if(f==0)
            {
                if(str[i] == str[i+1])
                {
                    f++;
                }
                else
                {
                    str2 += str[i];
                }
            }
            else if (f == 1)
            {
                if(str[i] != str[i-1])
                {
                    f++;
                    str2 += str[i];
                }
            }
            else
            {
                str2 += str[i];
            }
        }
        str = str2;
        if(f==0)
        {
            break;
        }
    }
    cout << str + "\n";
    return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED