func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int t, n, cnt[2000000];     scanf( %d , &n);     for (int i = 0; i < 2000000; ++i) cnt[i] = 0;     for (int i = 0; i < n; ++i) {       scanf( %d , &t);       cnt[t]++;     }     long long ans = 0;     for (int i = 0; i < 2000000 - 1; ++i) {       cnt[i + 1] += cnt[i] / 2;       if (cnt[i] % 2) ++ans;     }     cout << ans << endl;   }   