Java for LeetCode 069 Sqrt(x)
Implement int sqrt(int x)
.
Compute and return the square root of x.
解题思路一:
public int mySqrt(int x) {
return (int)Math.sqrt(x);
}
神奇般的Accepted。
解题思路二:
参考平方根计算方法 计算平方根的算法
这里给出最简单的牛顿法,JAVA实现如下:
public int mySqrt(int x) {
double g = x;
while (Math.abs(g * g - x) > 0.000001)
g = (g + x / g) / 2;
return (int) g;
}
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