Submission #1129175

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Source Code Expand

#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <ctime>

using namespace std;

int main(){

long long N,M,ans;
cin >> N >> M;

if(N*2<=M){
    ans = N + (M-N*2)/4;
}else{
    ans = M / 2;
}

printf("%lld\n",ans);


}

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