func_code_string: #include <bits/stdc++.h>   const int MaxN = 1e6 + 255;   const long long INF = 1e18 + 7;   const int Mod = 1e9 + 7;   using namespace std;   long long n, a, f[MaxN], ans;   int main() {     scanf( %lld , &n);     for (int i = 1; i <= n; ++i) {       scanf( %lld , &a);       ++f[a];     }     for (int i = 0; i < MaxN; ++i) {       if (f[i]) {         f[i + 1] += f[i] / 2;         f[i] %= 2;       }     }     for (int i = 0; i < MaxN; ++i)       if (f[i]) ++ans;     printf( %lld , ans);     return 0;   }   