Monistus

input/code.cpp: In function 'int main()':
input/code.cpp:32:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |     for (int i=0; i<s.size(); i++) {
      |                   ~^~~~~~~~~

#include <iostream>
#include <bits/stdc++.h>


#define all(arr) arr.begin(), arr.end()

using namespace std;
string s;
char res[500003];
int curr = 0;

void dup(int a, int b) {
    int c = a;
    while (c < b) {
        if (s[c] < '1' || s[c] > '9') {
            res[curr] = s[c];
            curr++;
        } else {
            if (c+1 < b) {
                dup(c+1, min(b, c+1+s[c]-'0'));
            }
        }
        c++;
    }
    return;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    getline(cin, s);
    for (int i=0; i<s.size(); i++) {
        if (s[i] >= '1' && s[i] <= '9') {
            dup(i+1, i+1+s[i]-'0');
        } else {
            res[curr] = s[i];
            curr++;
        }
    }
    cout << res << "\n";
    return 0;
}

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: WRONG ANSWER

Test 6

Group: 1, 2

Verdict: WRONG ANSWER

Test 7

Group: 1, 2

Verdict: WRONG ANSWER

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: ACCEPTED

Test 12

Group: 2

Verdict: ACCEPTED

Test 13

Group: 2

Verdict: ACCEPTED

Test 14

Group: 2

Verdict: ACCEPTED