#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

bool cmp(int a, int b){
    return a > b;
}

int main(){
    int g, b;
    cin >> g >> b;

    if (g == b) {
        cout << 0 << endl;
        return 0;
    }

    vector<int> girls(g), boys(b);
    for (int i=0;i<g;++i){
        cin >> girls[i];
    }
    for (int i=0;i<b;++i){
        cin >> boys[i];
    }
    sort(girls.begin(), girls.end(), cmp);
    sort(boys.begin(), boys.end(), cmp);

    for (int i=g-2;i>=0;--i){
        girls[i]+=girls[i+1];
    }
    for (int i=b-2;i>=0;--i){
        boys[i]+=boys[i+1];
    }

    vector<int> v(min(g, b));
    for (int i=0;i<min(g, b);++i){
        v[i] = boys[i]*i + girls[i];
    }

    int min = v[0];

    for (int i=1;i<v.size();++i){
        if (min > v[i]) min = v[i];
    }

    cout << min << endl;
    return 0;
}



I don't know which tests fail my code( and why WA1?