69. Sqrt(x)

Python

from math import sqrt
class Solution:
    def mySqrt(self, x: int) -> int:
        return int(sqrt(x))

Java

class Solution {
    public int mySqrt(int x) {
        return (int)Math.sqrt(x);
    }
}

Golang

func mySqrt(x int) int {
    return int(math.Sqrt(float64(x)))
}