func_code_string: #include <bits/stdc++.h>   using namespace std;   int A[10005], B[10005];   long long int dp[10005];   int main() {     int n, C;     scanf( %d %d , &n, &C);     for (int i = 0; i < n; i++) scanf( %d , &A[i]);     for (int i = 0; i < n; i++) scanf( %d , &B[i]);     for (int i = n - 1; i >= 0; i--) {       for (int j = n; j >= 0; j--) {         dp[j] += (long long int)j * (long long int)C + B[i];         if (j > 0) dp[j] = min(dp[j], dp[j - 1] + A[i]);       }     }     long long int ret = dp[0];     for (int j = 0; j <= n; j++) ret = min(ret, dp[j]);     printf( %lld n , ret);     return 0;   }   