题目:
题解:
class Solution {
public:bool isPerfectSquare(int num) {double x0 = num;while (true) {double x1 = (x0 + num / x0) / 2;if (x0 - x1 < 1e-6) {break;}x0 = x1;}int x = (int) x0;return x * x == num;}
};
题目:
题解:
class Solution {
public:bool isPerfectSquare(int num) {double x0 = num;while (true) {double x1 = (x0 + num / x0) / 2;if (x0 - x1 < 1e-6) {break;}x0 = x1;}int x = (int) x0;return x * x == num;}
};
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