Leetcode 633. Sum of Square Numbers
Aug 25, 2021
[medium]
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
Example 3:
Input: c = 4
Output: true
Example 4:
Input: c = 2
Output: true
Example 5:
Input: c = 1
Output: true
Constraints:
0 <= c <= 231 - 1
[Java]
- use two pointer to closer the target number
- if we could not find a result for the nunmber c, return false