func_code_string: #include <bits/stdc++.h>   using namespace std;   int toDelete = 0, arr[1500010], N;   int main() {     cin.sync_with_stdio(0);     cin.tie(0);     cin >> N;     for (int i = 0; i < N; ++i) {       int x;       cin >> x;       arr[x]++;     }     int ans = 0;     for (int i = 0; i <= 1500000; ++i) {       int val = arr[i];       int id = i;       arr[i] = 0;       while (val > 0) {         arr[id] += val % 2;         id++;         val /= 2;       }       if (arr[i]) ans++;     }     cout << ans;     return 0;   }   