func_code_string: #include <bits/stdc++.h>   using namespace std;   const double PI = acos(-1.0);   const double EPS = 1e-9;   const long long MOD = 100000000;   const int N = 300009;   const int N2 = 300009;   void fast() { std::ios_base::sync_with_stdio(0); }   int main() {     long long n, m;     long long x = 0;     scanf( %lld%lld , &n, &m);     vector<long long> b(n), g(m);     for (long long &i : b) {       scanf( %lld , &i);       x += i * m;     }     for (long long &i : g) scanf( %lld , &i);     sort(b.rbegin(), b.rend());     sort(g.rbegin(), g.rend());     long long i = 0, cnt = 0;     long long ans = 0;     if (g[m - 1] < b[0] || b[0] > g[m - 1]) {       puts( -1 );       return 0;     }     for (long long j = 0; j < m; j++) {       if (cnt == m - 1) i++, cnt = 0;       if (g[j] > b[0]) {         ans += g[j] - b[i];         cnt++;       }     }     printf( %lld , ans + x);     return 0;   }   