Monistus

#include <iostream>
#include <stack>
#include <string>
 
using namespace std;
 
string processString(const string& input_str) {
    stack<char> st;
 
    for (char ch : input_str) {
        if (isdigit(ch)) {
            int d = ch - '0';
            string substr;
            while (!st.empty() && isalpha(st.top())) {
                substr = st.top() + substr;
                st.pop();
            }
            string duplicated = substr;
            for (int i = 1; i < d; i++) {
                duplicated += substr;
            }
            for (char c : duplicated) {
                st.push(c);
            }
        } else {
            st.push(ch);
        }
    }
 
    string result;
    while (!st.empty()) {
        result = st.top() + result;
        st.pop();
    }
 
    return result;
}
 
int main() {
    string input_str;
    cin >> input_str;
    string result = processString(input_str);
    cout << result << endl;
 
    return 0;
}

Test 1

Group: 1, 2

Verdict: TIME LIMIT EXCEEDED

Test 2

Group: 1, 2

Verdict: WRONG ANSWER

Test 3

Group: 1, 2

Verdict: WRONG ANSWER

Test 4

Group: 1, 2

Verdict: WRONG ANSWER

Test 5

Group: 1, 2

Verdict: WRONG ANSWER

Test 6

Group: 1, 2

Verdict: WRONG ANSWER

Test 7

Group: 1, 2

Verdict: WRONG ANSWER

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