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

int main()
{
    long long n,m,k;
    cin >> n >> m;
    k=min(n,m);
    if (n==m || n==m+1 || m==n+1) {
        int i=0;
    while (i*i<n+m) {
        i++;
    }
    cout << i-1;
    }
    else {
        int j=0;
    while (j*j<k+k+1) {
        j++;
    }
    cout << j-1;
    }
    return 0;
}