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

int main() {
	int n, m;
	cin >> n >> m;

	if (m < n) {
		swap(n, m);
	}

	int k = 1;
	int ans = 0;

	while (true) {
		double s = k * k;
		int a = floor(s / 2.0);
		int b = ceil(s / 2.0);

		if (a <= n && b <= m) {
			ans = k;
		} else {
			break;
		}

		++k;
	}

	cout << ans << endl;
}