P2705 小球

#include<bits/stdc++.h>
#define int long long
using namespace std;
int n,m;
int a,b,c;
int maxn;
signed main(){
	cin >> n >> m >> a >> b >> c;
	for(int i = 0 ; i <= n ; i ++){
		for(int j = 0 ; j <= m ; j ++){
			if(i + m - j > n || j + n - i > m)continue;
			maxn = max(maxn , a * i + b * j + (n - i + m - j) * c);
		}
	}
	cout << maxn;
	return 0;
}