Submission #3619062

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Source Code Expand

//おまじない
#include <iostream>
#include <algorithm>
#include <vector>
#include <string>
#include <utility>
#define INF 1e9+7
#define rep(i,m,n) for(int i=m;i<n;i++)
#define mrep(i,m,n) for(int i=m;i>n;i--)
#define NO cout<<"NO"<<endl;
#define YES cout << "YES"<<endl;
#define No cout << "No"<<endl;
#define Yes cout << "Yes"<<endl;
using namespace std;
typedef long long int ll;
typedef unsigned long long int ull;


//(int)'a'は97 (int)'A'は65 (int)'1'は49
//おまじない



int main() {

	int ans1 = 0, ans2 = 0;
	ll x, y;
	cin >> x >> y;

	if (x * 2 <= y) {
		cout << x + (y - 2 * x) / 4 << endl;
	}
	else {
		cout << (y - (y % 2)) / 2 << endl;
	}

	return 0;
}

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