Monistus

input/code.cpp: In function 'std::string recursive(std::string)':
input/code.cpp:8:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |     for(auto i = 0; i < s.size(); i++){
      |                     ~~^~~~~~~~~~

#include <iostream>
#include <vector>
#include <string>
using namespace std;

string recursive(string s){
    string ans;
    for(auto i = 0; i < s.size(); i++){
        if(isdigit(s[i])){
            string substr = recursive(s.substr(i+1, stoi(&s[i])));
            ans += substr;
            ans += substr;
            i += stoi(&s[i]);
        }
        else
            ans += s[i];
    }
    return ans;
}

int main(){
    string a;
    cin >> a;
    a = recursive(a);

    cout << a;
}

Test 1

Group: 1, 2

Verdict: WRONG ANSWER

Test 2

Group: 1, 2

Verdict: ACCEPTED

Test 3

Group: 1, 2

Verdict: WRONG ANSWER

Test 4

Group: 1, 2

Verdict: ACCEPTED

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: RUNTIME ERROR

Test 9

Group: 2

Verdict: OUTPUT LIMIT EXCEEDED

Test 10

Group: 2

Verdict: OUTPUT LIMIT EXCEEDED

Test 11

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 12

Group: 2

Verdict: RUNTIME ERROR

Test 13

Group: 2

Verdict: RUNTIME ERROR

Test 14

Group: 2

Verdict: RUNTIME ERROR