func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MAX = 1005;   int N, K, D[MAX], S[MAX];   int main() {     scanf( %d%d , &N, &K);     for (int i = 0; i < (int)N; i++) scanf( %d , &D[i]);     for (int i = 0; i < (int)N; i++) scanf( %d , &S[i]);     int res = 0;     int lho = S[0];     int pos = 0;     int fuel = 0;     while (pos != N) {       if (lho < S[pos]) lho = S[pos];       fuel += S[pos];       int rem = max(0, D[pos] - fuel);       int add = (rem + lho - 1) / lho;       res += add * K;       fuel += add * lho;       fuel -= D[pos];       res += D[pos];       pos++;     }     printf( %d n , res);   }   