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: 5 Output: True Explanation: 1 * 1 + 2 * 2 = 5
Example 2:
Input: 3 Output: False
class Solution {
public boolean judgeSquareSum(int c) {
if(c == 1) return true;
for(int i=0;i<=Math.sqrt(c);i++){
if (Math.floor(Math.sqrt(c-i*i)) == Math.sqrt(c-i*i)) return true;
}
return false;
}
}
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Original author: Jake Tao Source: 「633. Sum of Square Numbers」
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