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yongchanson yongchanson

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solution add - 없는-숫자-더하기

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level-1
- 없는-숫자-더하기.js

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`‎level-1/없는-숫자-더하기.js`

Lines changed: 25 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -14,4 +14,28 @@ function solution(numbers) {`
`14`	`14`	`answer += numbers.includes(i) ? 0 : i`
`15`	`15`	`}`
`16`	`16`	`return answer;`
`17`		`-}`
	`17`	`+}`
	`18`	`+`
	`19`	`+//정답 3 - yongchanson`
	`20`	`+function solution(numbers) {`
	`21`	`+ var answer = -1;`
	`22`	`+`
	`23`	`+ let arr = [0,1,2,3,4,5,6,7,8,9];`
	`24`	`+ let arr_sum = 0;`
	`25`	`+ let numbers_sum = 0;`
	`26`	`+`
	`27`	`+ for(i=0; i<arr.length/2; i++) {`
	`28`	`+ if(arr[i] == arr[arr.length -1 -i]) {`
	`29`	`+ arr_sum += arr[i]`
	`30`	`+ } else {`
	`31`	`+ arr_sum += arr[i] + arr[arr.length -1 -i]`
	`32`	`+ }`
	`33`	`+ }`
	`34`	`+`
	`35`	`+ for(i=0; i<numbers.length; i++) {`
	`36`	`+ numbers_sum += numbers[i]`
	`37`	`+ }`
	`38`	`+`
	`39`	`+ answer = arr_sum - numbers_sum;`
	`40`	`+ return answer;`
	`41`	`+}`

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