Submission #1114822

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Source Code Expand

#include<iostream>
#include<iomanip>
#include<stack>
#include<queue>
#include<numeric>
#include<algorithm>
#include<string>
#include<map>
#include<bitset>
#include<set>
#include<cmath>
#define int long long
const int inf=893810114514l;
const int mod=1000000007ll;
const int dd[]={0,-1,0,1,0};
using namespace std;
int p[2001];
void san(int u){
	string s;
	while(u){
		s.push_back(u%3+'0');
		u/=3;
	}
	reverse(begin(s),end(s));
	cout<<s;
}
signed main(){
	int n,m;
	cin>>n>>m;
	if(m/2<n)
		cout<<m/2<<endl;
	else
		cout<<n+(m-n*2)/4<<endl;
}

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