Commit027a83f

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Update 0015-3sum.java

File(s) Modified: 0015-3sum.javaLanguage(s) Used: JavaSubmission URL:https://leetcode.com/problems/3sum/submissions/1074841189/Description: Only added comment to code that helps understand it better

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Original file line number	Diff line number	Diff line change
`@@ -6,6 +6,7 @@ public List<List<Integer>> threeSum(int[] nums) {`
`6`	`6`	`LinkedList<List<Integer>>sol =newLinkedList<List<Integer>>();`
`7`	`7`
`8`	`8`	`for (inti =0;i <nums.length -2;i++) {`
	`9`	`+//Only consider non-duplicate elements for i`
`9`	`10`	`if (i ==0 \|\| (i >0 &&nums[i] !=nums[i -1])) {`
`10`	`11`	`inttarget =0 -nums[i];`
`11`	`12`	`intleft =i +1;`

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