func_code_string: #include <bits/stdc++.h>   using namespace std;   long double pi = 3.141592653589793238;   set<long long>::iterator it;   multiset<long long>::iterator itr;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     ;     long long t;     t = 1;     while (t--) {       long long n;       cin >> n;       long long m, a, b;       cin >> m >> a >> b;       long long r = n % m;       cout << min(b * (r), a * (m - r)) << endl;     }   }   