Submission #1114966

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Source Code Expand

#include <bits/stdc++.h>
#define FOR(i,a,b) for(ut i=(a);i<(ut)(b);i++)
#define REP(i,b) FOR(i,0,b)
#define ALL(c) c.begin(),c.end()
#define PB push_back
#define cat //cout << __LINE__ << endl;
using namespace std;
typedef long long LL;
typedef double ld;
typedef int ut;
typedef vector<ut> VI;
typedef pair<ut,ut> pr;
const int SIZE=1234;
const int INF=10+1e9;
const LL p=7+1e9;
int main(){
	LL N,M;
	cin >> N >> M;
	cout << min((N*2+M)/4,M/2) << endl;
	return 0;
}

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