#include <bits/stdc++.h>
#define For(i, a, b) for(long long i = a; i < b; i++)
#define rep(i, n) For(i, 0, n)
#define rFor(i, a, b) for(long long i = a; i >= b; i--)
#define ALL(v) (v).begin(), (v).end()
#define rALL(v) (v).rbegin(), (v).rend()
using namespace std;

using lint = long long;
using ld = long double;

int INF = 2000000000;
lint LINF = 1000000000000000000;

int main() {
    ld x, y;
    cin >> x >> y;
    int l = 0, r = 500000;
    while (r - l > 1) {
        int mid = (l + r) / 2;
        ld han = (ld)mid / 2.0;
        if (x * x + y * y < han * han) {
            r = mid;
        } else {
            l = mid;
        }
    }
    cout << r << endl;
}