Submission #1649747

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Source Code Expand

#include<iostream>
#include<string>
#include<string.h>
#include<algorithm>
#include<stdio.h>
#include<cmath>
#include<vector>
#include<utility>
#include<stack>
#include<queue>

#define FOR(i, a, b) for(int i=(a);i<=(b);i++)
#define RFOR(i, a, b) for(int i=(a);i>=(b);i--)
#define MOD 1000000007

using namespace std;

int main(void) {
	long long int n, m;
	long long int count = 0;

	cin >> n >> m;

	if (n * 2 > m) {
		count += m / 2;
	}
	else if (n * 2 == m) {
		count = n;
	}
	else if (n * 2 < m) {
		count += n;
		m -= n * 2;
		n = 0;
		count += m / 4;
	}
	cout << count << endl;

	return 0;
}

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