Monistus

input/code.cpp: In function 'int main()':
input/code.cpp:13:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |   for (int i = 0; i < next.size(); ++i) {
      |                   ~~^~~~~~~~~~~~~
input/code.cpp:22:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |       for (int i = end; i < s.size() - 1; ++i) {
      |                         ~~^~~~~~~~~~~~~~

#include <bits/stdc++.h>
#include <cctype>
#include <unistd.h>

using namespace std;

int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  string s;
  cin >> s;
  vector<int> next(s.size());
  for (int i = 0; i < next.size(); ++i) {
    next[i] = i + 1;
  }
  int curr = 0;
  int stop = s.size() - 1;
  while (true) {
    if (isdigit(s[curr])) {
      int end = s.size();
      s += s.substr(next[curr], s[curr] - '0');
      for (int i = end; i < s.size() - 1; ++i) {
        next.push_back(i + 1);
      }
      next.push_back(next[curr]);
      next[curr] = end;
    } else {
      cout << s[curr];
    }
    if (curr == stop) break;
    curr = next[curr];
  }
}

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: TIME LIMIT EXCEEDED

Test 10

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 11

Group: 2

Verdict: ACCEPTED

Test 12

Group: 2

Verdict: ACCEPTED

Test 13

Group: 2

Verdict: ACCEPTED

Test 14

Group: 2

Verdict: ACCEPTED