Monistus

input/code.cpp: In function 'bool check(std::string)':
input/code.cpp:10:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |         for (int i = 0; i < S.size(); i++) {
      |                         ~~^~~~~~~~~~
input/code.cpp: In function 'int main()':
input/code.cpp:21:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |                 for (int i = 0; i < s.size(); i++) {
      |                                 ~~^~~~~~~~~~

#include <bits/stdc++.h>
using namespace std;
string s, t;

bool isDigit(char c) {
	return c >= '0' && c <= '9';
}

bool check(string S) {
	for (int i = 0; i < S.size(); i++) {
		if (isDigit(S[i])) {
			return false;
		}
	}
	return true;
}

int main() {
	cin >> s;
	while (!check(s)) {
		for (int i = 0; i < s.size(); i++) {
			if (isDigit(s[i])) {
				int m = s[i] - '0';
				for (int u = 1; u <= m; u++) {
					t.push_back(s[i + u]);
				}
			} else {
				t.push_back(s[i]);
			}
		}
//		cout << t << endl;
		s = t;
		t = "";
	}
	cout << s << endl;
	return 0;
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 1, 2

Verdict: ACCEPTED

Test 3

Group: 1, 2

Verdict: WRONG ANSWER

Test 4

Group: 1, 2

Verdict: ACCEPTED

Test 5

Group: 1, 2

Verdict: ACCEPTED

Test 6

Group: 1, 2

Verdict: ACCEPTED

Test 7

Group: 1, 2

Verdict: WRONG ANSWER

Test 8

Group: 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: WRONG ANSWER

Test 10

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 11

Group: 2

Verdict: ACCEPTED

Test 12

Group: 2

Verdict: ACCEPTED

Test 13

Group: 2

Verdict: ACCEPTED

Test 14

Group: 2

Verdict: ACCEPTED