func_code_string: #include <bits/stdc++.h>   using namespace std;   inline int setBit(int N, int pos) { return N = N | (1 << pos); }   inline int resetBit(int N, int pos) { return N = N & ~(1 << pos); }   inline bool checkBit(int N, int pos) { return (bool)(N & (1 << pos)); }   int main() {     long long n, k, x, sum = 0;     scanf( %lld %lld , &n, &k);     while (n--) {       scanf( %lld , &x);       sum += (x / k) + (bool)(x % k);     }     printf( %lld n , sum / 2 + (bool)(sum % 2));     return 0;   }   