func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     int n;     cin >> n;     vector<int> a(n);     for (auto &x : a) cin >> x;     sort(a.begin(), a.end());     set<int> s;     int ans = 0, x;     for (int i = 0; i < n; i++) {       x = a[i];       if (s.find(x) != s.end()) {         while (1) {           if (s.find(x) != s.end())             ans++;           else             break;           x++;         }       }       s.insert(x);     }     cout << ans <<   n ;     return 0;   }   