Submission #1116817

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Source Code Expand

#include <iostream>
#define INF 1e+18
#define int long long
using namespace std;
 
signed main(){
	int n,m;
	cin >> n >> m;
	if(n * 2 >= m) {
		cout << m / 2 << endl;
		return 0;
	}
	n *= 2;
	cout << (n + m) / 4 << endl;
	return 0;
}

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