func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, c = 0;     cin >> n;     int arr[n];     set<int> s;     for (int i = 0; i < n; i++) cin >> arr[i];     sort(arr, arr + n);     for (int i = 1; i < n; i++) {       if (arr[i] == arr[i - 1]) {         c++;         arr[i]++;       } else if (arr[i] < arr[i - 1]) {         while (arr[i] <= arr[i - 1]) {           arr[i]++;           c++;         }       }     }     cout << c;   }   