Merkkijono

input/code.cpp: In function 'std::string merkkijono(std::string)':
input/code.cpp:9:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 1; i < jono.length(); i++) {
                                  ^
input/code.cpp:13:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for (int j = i + 1; j < jono.length(); j++) {
                                        ^

#include <iostream>
#include <string>

using namespace std;

string merkkijono(string jono) {
	bool poisto = false;

	for (int i = 1; i < jono.length(); i++) {
		if (jono[i] == jono[i - 1]) {
			int alku = i - 1;
			int len = jono.length();
			for (int j = i + 1; j < jono.length(); j++) {
				if (jono[j] != jono[j - 1]) {
					len = j - alku;
					break;
				}
					
			}
			jono.erase(alku, len);
			poisto = true;
			break;
		}
	}

	if (poisto)
		return merkkijono(jono);
	else
		return jono;
}

int main() {

	string in;
	cin >> in;

	cout << merkkijono(in) << endl;

	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