Monistus

input/code.cpp: In function 'int main()':
input/code.cpp:13:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |     while (i < s.size()) {
      |            ~~^~~~~~~~~~

#include <vector>
#include <iostream>
#include <string>

using namespace std;

int main() {

    string s;
    cin >> s;

    int i = 0; 
    while (i < s.size()) {
        if (49 <= int(s[i]) && int(s[i]) <= 57) {     
            string s0 = s.substr(0, i);
            string s1 = s.substr(i + 1, int(s[i]) - 48);
            string s2 = s.substr(i + 1, s.size() - i);            
            s = s0 + s1 + s2;
        } else {
          i += 1;  
        }
    }

    cout << s << "\n";

    return 0;
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 1, 2

Verdict: ACCEPTED

Test 3

Group: 1, 2

Verdict: ACCEPTED

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: ACCEPTED

Test 8

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 9

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 10

Group: 2

Verdict: TIME LIMIT EXCEEDED

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