Submission #1115475

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Source Code Expand

#include<cstdio>
#include<cstring>
using namespace std;
typedef long long ll;
int main()
{
	ll n,m;
	while(~scanf("%lld%lld",&n,&m))
	{
		ll ans=0;
		if(2*n<=m)
		{
			ans=n;
			m-=2*n;
			ans+=m/4;
		}
		else 
		{
			ans=m/2;
		}
		printf("%lld\n",ans);
	}
	return 0;
}

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