#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define srep(i,s,t) for (int i = s; i < t; ++i)
#define drep(i,n) for(int i = (n)-1; i >= 0; --i)
using namespace std;
typedef long long int ll;
typedef pair<int,int> P;
#define yn {puts("Yes");}else{puts("No");}
#define MAX_N 200005

int main() {
    int x, y;
    cin >> x >> y;
    int l = 0;
    int r = 30000;

    while(l + 1 < r){
        double mid = (l + r) / 2;
        if((double)x * x + y * y < mid * mid / 4) r = mid;
        else l = mid;
    }
    cout << r << endl;
    return 0;
}