Monistus

input/code.cpp: In function 'int find_num(std::string*)':
input/code.cpp:4:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    4 |   for (int i = 0; i < ((*str).size()); i++) {
      |                   ~~^~~~~~~~~~~~~~~~~

#include <string>
#include <iostream>
int find_num(std::string *str) {
  for (int i = 0; i < ((*str).size()); i++) {
    if (isdigit((*str)[i])) {
      return i;
    }
  }
  return -1;
}

int main() {
  std::string input = "";
  std::cin >> input;
  int index;
  int count;
  while (true) {
    index = find_num(&input);
    if (index == -1) {
      std::cout << input;
      break;
    } else {
      count = std::stoi(&input[index]);
      input.erase(index, 1);
      input.insert(index, input.substr(index, count));
    }
  }
  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