let inpt = readLine()!.split(separator: " ").map{Int($0)}

func sqrt(_ min:Int, _ max:Int, _ target:Int)->Int {
    if(max == min) {
        return max + 1
    }
    if(max-min <= 1) {
        return max
    }
    let mid = (max + min) / 2
    if(mid * mid > target) {
        return sqrt(min, mid, target)
    } else {
        return sqrt(mid, max, target)
    }
}

let hankei2 = inpt[0]!*inpt[0]!+inpt[1]!*inpt[1]!
let ans = sqrt(0, hankei2, hankei2)
print(ans)