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

int main() {
    pair<int, int> db[1450];
    int x, a, b;
    for(int i = 0; i < 1450; ++i) {
        x = i * i;
        if(x%2){a=x/2;b=a+1;}
        else {a=x/2;b=x/2;}
        db[i].first=a;
        db[i].second=b;
    }
    int n, m;
    cin >> n >> m;
    //cout << sqrt(2000000);
    int i = 0;
    while(true) {
        if(min(n, m) >= db[i].first && max(n, m) >= db[i].second) {
            ++i;
        } else break;
    }
    cout << --i << "\n";
    return 0;
}