Commit d69ea3b

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adding day-four

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Lines changed: 4 additions & 3 deletions

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`@@ -1,6 +1,7 @@`
`1`	`1`	`# LeetCode Challenge`
`2`	`2`
`3`	`3`	`- May`
`4`		`- - Day 1 [First Bad Version](https://github.com/libterty/leetcode-challenge/blob/master/src/day-one/index.ts)`
`5`		`- - Day 2 [Jewels and Stones](https://github.com/libterty/leetcode-challenge/blob/master/src/day-two/index.ts)`
`6`		`- - Day 3 [Ransom Note](https://github.com/libterty/leetcode-challenge/blob/master/src/day-three/index.ts)`
	`4`	`+ - Day 1: [First Bad Version](https://github.com/libterty/leetcode-challenge/blob/master/src/day-one/index.ts) :unamused:`
	`5`	`+ - Day 2: [Jewels and Stones](https://github.com/libterty/leetcode-challenge/blob/master/src/day-two/index.ts) :expressionless:`
	`6`	`+ - Day 3: [Ransom Note](https://github.com/libterty/leetcode-challenge/blob/master/src/day-three/index.ts) :hushed:`
	`7`	`+ - Day 4: [Number Complement](https://github.com/libterty/leetcode-challenge/blob/master/src/day-four/index.ts) :laughing:`

Lines changed: 15 additions & 0 deletions

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`@@ -0,0 +1,15 @@`
	`1`	`+/**`
	`2`	`+ * @param {number} num`
	`3`	`+ * @return {number}`
	`4`	`+ */`
	`5`	`+export const findComplement = function (num: number): number {`
	`6`	`+ let inputStr: string[] = num.toString(2).split('');`
	`7`	`+ let outputStr: string = '';`
	`8`	`+`
	`9`	`+ inputStr.forEach((n: string): string => (n === '1' ? (outputStr += '0') : (outputStr += '1')));`
	`10`	`+`
	`11`	`+ return parseInt(outputStr, 2);`
	`12`	`+};`
	`13`	`+`
	`14`	`+const data = findComplement(5);`
	`15`	`+console.log('data', data);`

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