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633. Sum of Square Numbers
Description
Given a non-negative integer c, decide whether there're two integers a and b such that a2 + b2 = c.
Example 1:
Input: c = 5 Output: true Explanation: 1 * 1 + 2 * 2 = 5
Example 2:
Input: c = 3 Output: false
Constraints:
0 <= c <= 231 - 1