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Merge pull requestneetcode-gh#2821 from chetannada/ltc-1588-js

Create 1588-sum-of-all-odd-length-subarrays.js

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	`1`	`+/**`
	`2`	`+ *@param {number[]} arr`
	`3`	`+ *@return {number}`
	`4`	`+ */`
	`5`	`+varsumOddLengthSubarrays=function(arr){`
	`6`	`+letsum=0,len=arr.length;`
	`7`	`+for(leti=0;i<arr.length;i++){`
	`8`	`+lettotal=i*(len-i)+(len-i);`
	`9`	`+sum+=Math.ceil(total/2)*arr[i];`
	`10`	`+}`
	`11`	`+returnsum;`
	`12`	`+};`

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