func_code_string: #include <bits/stdc++.h>   using namespace std;   long long n, m, a, b;   int main() {     scanf( %lld %lld %lld %lld , &n, &m, &a, &b);     long long int mm = n % m;     unsigned long long ans = min((m - mm) * a, mm * b);     printf( %llu n , ans);     return 0;   }   