Monistus

// https://cses.fi/484/task/B
 
#include <iostream>
using namespace std;
#define ll long long
 
int main() {
    string word;
    cin >> word;

    while (true)
    {
        int number_index = -1;
        int len = word.size();
        for (int i = 0; i < len; i++)
        {
            if (isdigit(word[i])) {
                number_index = i;
                break;
            }
        }
        
        if (number_index == -1) break;
        
        int number = word[number_index] - 48;
        // cout << number << endl;
        word = word.substr(0, number_index)
            .append(word.substr(number_index + 1, number))
            .append(word.substr(number_index + 1));
    }
    cout << word;

    /*
    a=input()
    while True:
        if a.isalpha():
            break
        for i in range(len(a)):
            if a[i].isdigit():
                break
        a = a[:i]+a[(i+1):(i+1+int(a[i]))]+a[(i+1):]
    print(a)
    */

    
}

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