Monistus

input/code.cpp: In function 'int main()':
input/code.cpp:9:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |         for (int i = 0; i < a.length(); i++) {
      |                         ~~^~~~~~~~~~~~

#include <vector>
#include <iostream>
using namespace std;

string a;

int main() {
	cin >> a;
	for (int i = 0; i < a.length(); i++) {
		if (a[i] >= '1' && a[i] <= '9') {
			int n = a[i] - '0';
			a.erase(i, 1);
			for (int j = 0; j < n; j++) {
				a.insert(i+j, 1, a[i+2*j]);
			}
		}
	}

	cout << a << endl;
}

Test 1

Group: 1, 2

Verdict: WRONG ANSWER

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: WRONG ANSWER

Test 9

Group: 2

Verdict: WRONG ANSWER

Test 10

Group: 2

Verdict: WRONG ANSWER

Test 11

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 12

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 13

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 14

Group: 2

Verdict: TIME LIMIT EXCEEDED