Monistus

input/code.cpp: In function 'std::string sievenna(std::string)':
input/code.cpp:11:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |     for(int i = 0; i < s.size(); i++){
      |                    ~~^~~~~~~~~~
input/code.cpp:16:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |         if(isdigit(c) && i < s.size()-x){
      |                          ~~^~~~~~~~~~~~
input/code.cpp:29:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |             if(i >= s.size()-x) k = true;
      |                ~~^~~~~~~~~~~~~

#include<bits/stdc++.h>
using namespace std;
using ll = long long;

bool k = false;

string sievenna(string s){

    string u = "";

    for(int i = 0; i < s.size(); i++){

        char c = s[i];
        int x = c - '0';

        if(isdigit(c) && i < s.size()-x){
            string m = s.substr(i + 1, x);
            k = false;
            m = sievenna(m);
            if(!k){
                s.erase(i + 1, x);
                s.insert(i + 1, m + m);
            }
            else{
                s.insert(i + 1, m);
            }
        }
        else{
            if(i >= s.size()-x) k = true;
            u += c;
        }

    }

    return u;
    
}



int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);
    
    string s;
    cin >> s;

    cout << sievenna(s);

    
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

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: ACCEPTED

Test 6

Group: 1, 2

Verdict: ACCEPTED

Test 7

Group: 1, 2

Verdict: ACCEPTED

Test 8

Group: 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: WRONG ANSWER

Test 10

Group: 2

Verdict: WRONG ANSWER

Test 11

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 12

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 13

Group: 2

Verdict: ACCEPTED

Test 14

Group: 2

Verdict: ACCEPTED