65pts求条（玄一小号关注）

#include <bits/stdc++.h>
using namespace std;
#define ll long long
ll n,m,a,b,ans;
int main() {
    cin>>n>>m>>a>>b;
    ll x1=min(n/a,m/b);
    ll y1=min((n-a*x1)/b,(m-b*x1)/a);
    ans=max(ans, x1+y1);
    ll y2=min(n/b, m/a);
    ll x2=min((n-b*y2)/a,(m-a*y2)/b);
    ans=max(ans,x2+y2);
    ll t=(n+m)/(a+b);
    ll x3=min(t,min(n/a,m/b));
    ll y3=min(t-x3, min(n/b,m/a));
    ans=max(ans,x3+y3);
    cout<<ans;
}