633. Sum of Square Numbers标题

633. Sum of Square Numbers标题

Given a non-negative integer c, your task is to decide whether there’re two integers a and b such that a2 + b2 = c.

Example 1:

Input: 5Output: TrueExplanation: 1 * 1 + 2 * 2 = 5

Example 2:

Input: 3Output: False

public class Solution { public boolean judgeSquareSum(int c) { int beg = 0; int end = (int) Math.sqrt(c); while (beg <= end) { int target = beg * beg + end * end; if (target > c) { end--; } else if (target < c) { beg++; } else { return true; } } return false; } }

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