Submission #1114476

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;

#define in cin
#define out cout

#define REP(i,n) for(int i=0; i<n; i++)
#define REP2(i,s,e) for(int i=s; i<e; i++)
#define REPE(i,s,e) for(int i=s; i<=e; i++)
#define REPR(i,s,e) for(int i=s; i>=e; i--)

#define all(v) v.begin(), v.end()
#define pb push_back

#define ll long long
#define pii pair<ll, ll>

#define x first
#define y second
#define intINF 2147483647
#define llINF 9223372036854775807LL
#define MOD 1000000007

int main()
{
#ifndef ONLINE_JUDGE
    //freopen("in.txt", "r", stdin);
#endif

    ll n, m; in >> n >> m;
    ll r = 0;

    ll t1 = min(n, m/2);
    n -= t1;
    m -= t1*2;
    r += t1;

    r += m/4;

    out << r << endl;

    return 0;
}

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