leetcode-go/leetcode/easy/633.sum-of-square-numbers.go

func judgeSquareSum(c int) bool {
	for a := 0; a*a <= c; a++ {
		b2 := c - a*a
		if b := int(math.Sqrt(float64(b2))); b*b == b2 {
			return true
		}
	}
	return false
}