package main

import (
	"fmt"
	"math"
)

func judgeSquareSum(c int) bool {
	high , low := int(math.Sqrt(float64(c))) , 0
	for high >= low {
		v := high * high + low * low
		if v == c {
			return true
		} else if v > c {
			high --
		}else  {
			low ++
		}
	}
	return false
}

func main() {
	fmt.Println(judgeSquareSum(2147483640))
}