Merkkijono

input/code.cpp: In function 'std::string checkstr(std::string)':
input/code.cpp:13:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0; i<str.length(); i++) {
                                 ^
input/code.cpp:18:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             if(i==(str.length()-1)) pos = i-len-1;
                                  ^

#include <iostream>
#include <algorithm>
#include <string>

using namespace std;

string input, check;

string checkstr(string str) {
    int p = 1;
    int len = 1;
    int pos = 0;
    for(int i = 0; i<str.length(); i++) {
        //p = str[i];
        if(i>0 && str[i]==str[i-1]) {
            p++;
            len = max(p,len);
            if(i==(str.length()-1)) pos = i-len-1;
        }
        else if (p>len) {
            len=p;
            pos = i-len-1;
        }
        else {
            p=1;
        }
    }
    
    if (len<=1) return "\n";
    
    return str.erase(pos,len);
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    
    cin >> input;
    
    int end = 0;
    while (end > -1) {
        check = checkstr(input);
        if (check == "\n") {
            cout << input << "\n";
            end--;
        } 
        else input = check;
    }
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::out_of_range'
  what():  basic_string::erase

Test 3

Verdict: WRONG ANSWER

Test 4

Verdict: WRONG ANSWER

Test 5

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::out_of_range'
  what():  basic_string::erase

Test 6

Verdict: WRONG ANSWER

Test 7

Verdict: WRONG ANSWER

Test 8

Verdict: WRONG ANSWER

Test 9

Verdict: WRONG ANSWER

Test 10

Verdict: WRONG ANSWER