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Add 220502 정수 제곱근 판별.js

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Original file line number	Diff line number	Diff line change
`@@ -22,3 +22,11 @@ function solution(n) {`
`22`	`22`	`// 아니라면 -1 반환`
`23`	`23`	`return -1;`
`24`	`24`	`}`
	`25`	`+`
	`26`	`+//정답 4 - jaewon1676`
	`27`	`+function solution(n) {`
	`28`	`+ let s = parseInt(Math.sqrt(n)) // n의 제곱근을 확인`
	`29`	`+ if (s 2 === n) return ((s+1) 2)`
	`30`	`+`
	`31`	`+ return -1;`
	`32`	`+}`

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