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

int main() {
    int n, m;
    cin >> n >> m;
    int temp;
    temp = (min(n, m) * 2) + 1;
    for (int i = sqrt(temp); i > 0; i--) {
        if (i * i <= temp) {
            cout << i << endl;
            return 0;
        }
    }
    return 0;
}