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add: Sum of Two Integers

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`@@ -44,6 +44,7 @@ This is the solutions collection of my LeetCode submissions, most of them are pr`
`44`	`44`	`\|307\|[Range Sum Query - Mutable](https://leetcode.com/problems/range-sum-query-mutable/)\|[JavaScript](./src/range-sum-query-mutable/res.js)\|Medium\|`
`45`	`45`	`\|342\|[Power of Four](https://leetcode.com/problems/power-of-four/)\|[JavaScript](./src/power-of-four/res.js)\|Easy\|`
`46`	`46`	`\|344\|[Reverse String](https://leetcode.com/problems/reverse-string/)\|[JavaScript](./src/reverse-string/res.js)\|Easy\|`
	`47`	`+\|371\|[Sum of Two Integers](https://leetcode.com/problems/sum-of-two-integers/)\|[JavaScript](./src/sum-of-two-integers/res.js)\|Easy\|`
`47`	`48`	`\|384\|[Shuffle an Array](https://leetcode.com/problems/shuffle-an-array/)\|[JavaScript](./src/shuffle-an-array/res.js)\|Medium\|`
`48`	`49`	`\|404\|[Sum of Left Leaves](https://leetcode.com/problems/sum-of-left-leaves/)\|[JavaScript](./src/sum-of-left-leaves/res.js)\|Easy\|`
`49`	`50`	`\|434\|[Number of Segments in a String](https://leetcode.com/problems/number-of-segments-in-a-string/)\|[JavaScript](./src/number-of-segments-in-a-string/res.js)\|Easy\|`

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	`1`	`+/**`
	`2`	`+ * res.js`
	`3`	`+ *@authors Joe Jiang (hijiangtao@gmail.com)`
	`4`	`+ *@date 2017-03-03 22:05:30`
	`5`	`+ *`
	`6`	`+ * Calculate the sum of two integers a and b, but you are not allowed to use the operator + and -.`
	`7`	`+ *`
	`8`	`+ * Example`
	`9`	`+ *`
	`10`	`+ * Given a = 1 and b = 2, return 3.`
	`11`	`+ *`
	`12`	`+ *@param {number} a`
	`13`	`+ *@param {number} b`
	`14`	`+ *@return {number}`
	`15`	`+ */`
	`16`	`+letgetSum=function(a,b){`
	`17`	`+if(b===0){`
	`18`	`+returna;`
	`19`	`+}`
	`20`	`+`
	`21`	`+while(b!==0){`
	`22`	`+lett=a^b;`
	`23`	`+b=(a&b)<<1;`
	`24`	`+a=t;`
	`25`	`+}`
	`26`	`+`
	`27`	`+returna;`
	`28`	`+};`

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