Submission #1115596

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Source Code Expand

#include<stdio.h>
//#include<bits/stdc++.h>
#include<string.h>
#include<iostream>
#include<math.h>
#include<sstream>
#include<set>
#include<queue>
#include<map>
#include<vector>
#include<algorithm>
#include<limits.h>
#define inf 0x3fffffff
#define lson l,m,rt<<1
#define rson m+1,r,rt<<1|1
#define LL long long
#define ULL unsigned long long
using namespace std;
const int maxn=35;
int main()
{
    long long n,m;
    cin>>n>>m;
    if(2*n>m)
    {
        cout<<max(m/4,m/2)<<endl;
    }
    else
    {
        long long ans=m-2*n ;
        cout<<max(n+ans/4,m/4)<<endl;
    }
    return 0;
}

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