Submission #1115757

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Source Code Expand

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

#define rep(i, x, y) for(int i = (x), _ = (y); i <= _; ++ i)
#define per(i, x, y) for(int i = (x), _ = (y); i >= _; -- i)
#define dprintf(...) fprintf(stderr, __VA_ARGS__)
#define disp(x) cout << #x << "=" << x << "; "

typedef long long LL;

template<class T> void read(T& a)
{
	char c = getchar(); a = 0; T f = 1;
	for(; isdigit(c) == 0; c = getchar()) if(c == '-') f = -1;
	for(; isdigit(c); c = getchar()) a = a * 10 + c - '0';
	a *= f;
}

template <class T> bool chkmin(T& a, T b) { return a > b ? a = b, 1 : 0;}
template <class T> bool chkmax(T& a, T b) { return a < b ? a = b, 1 : 0;}

LL N, M;

int main()
{
#ifdef Leeson
	freopen("tmp.in", "r", stdin);
	freopen("tmp.out", "w", stdout);
#endif

	cin >> N >> M;
	LL ans = 0;
	if((N << 1) >= M)
		ans = M >> 1;
	else
		ans = ((N << 1) + M) >> 2;

	cout << ans << endl;

	return 0;
}

Submission Info

Judge Result