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

#define int long long

int N, M;

bool check(int X)
{
    if(X % 2 == 0)
    {
        if(N >= (X*X)/2 && M >= (X*X)/2)return 1;
        else return 0;
    }
    {
        if(min(N, M) >= (X*X)/2 && max(N, M) >= (X*X)/2 + 1)return 1;
        else return 0;
    }
}


signed main() {
	cin >> N >> M;
    int l = 1, r = 1e6;
    while(l < r - 1)
    {
        int mid = (l + r)/2;
        if(check(mid))l = mid;
        else r = mid;
    }
    cout << l;
}