LeetCode-- Implement int sqrt(int x)

public class Solution {
    public int MySqrt(int x) {
    if(x < 2){
	    return x;
	}
	if(x > int.MaxValue){
		x = int.MaxValue;
	}
	
	var half = 46340; // Sqrt(int.MaxValue)
	
	for(var i = half; i >= 1; i--){
		if(i * i == x){
			return i;
		}
		if(i * i < x){
			return i;
		}
	}
	
	return -1;
    }
}

LeetCode-- Implement int sqrt(int x)

原文：http://blog.csdn.net/lan_liang/article/details/50144615