Monistus

input/code.cpp: In function 'int main()':
input/code.cpp:10:15: warning: comparison of integer expressions of different signedness: 'int' and 'const size_type' {aka 'const long unsigned int'} [-Wsign-compare]
   10 |     if (index != std::string::npos) {
      |         ~~~~~~^~~~~~~~~~~~~~~~~~~~

#include <string>
#include <iostream>

int main() {
  std::string input = "";
  std::cin >> input;
  int index;
  while (true) {
    index = input.find_first_of("0123456789");
    if (index != std::string::npos) {  
      input.replace(index, 1, input.substr(index+1, std::stoi(&input[index])));
    } else {  
      std::cout << input;
      break;
    }
  }
  return 0;
}

Test 1

Group: 1, 2

Verdict: TIME LIMIT EXCEEDED

Test 2

Group: 1, 2

Verdict: ACCEPTED

Test 3

Group: 1, 2

Verdict: TIME LIMIT EXCEEDED

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: TIME LIMIT EXCEEDED

Test 8

Group: 2

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::out_of_range'
  what():  stoi

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: RUNTIME ERROR

terminate called after throwing an instance of 'std::out_of_range'
  what():  stoi