Merkkijono

input/code.cpp: In function 'int main()':
input/code.cpp:16:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i = 0; i < s.length()-1; ++i) {
                                  ^
input/code.cpp:28:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i = 0; i < s.length(); ++i) {
                                ^

#include <iostream>
#include <string>

using namespace std;

string s;

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cin >> s;
	while (true) {
		bool ch = false;
		int bg = -1;
		int ed = -1;
		for (int i = 0; i < s.length()-1; ++i) {
			if (bg == -1 && s[i] == s[i+1]) {
				bg = i;
				ch = true;
			}
			if (bg != -1 && s[i] != s[i+1]) {
				ed = i;
				break;
			}
		}
		if (bg != -1 && ed == -1) ed = s.length()-1;
		string ns = "";
		for (int i = 0; i < s.length(); ++i) {
			if (i < bg || i > ed) ns += s[i];
		}
		//cout << "s: " <<  ns << endl;

		s = ns;
		if (!ch || s.length() <= 1) {
			break;
		}
	}
	cout << s << "\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