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Update 78-Subsets.md

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`‎78-Subsets.md‎`

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Original file line number	Diff line number	Diff line change
`@@ -48,3 +48,20 @@ class Solution {`
`48`	`48`	`}`
`49`	`49`	`}`
`50`	`50`	```
	`51`	`+`
	`52`	`+`
	`53`	+```swift
	`54`	`+class Solution {`
	`55`	`+ func subsets(_ nums: [Int]) -> [[Int]] {`
	`56`	`+ var result = [[Int]].init([[]])`
	`57`	`+ for n in nums {`
	`58`	`+ for i in 0..<result.count {`
	`59`	`+ var temp = result[i]`
	`60`	`+ temp.append(n)`
	`61`	`+ result.append(temp)`
	`62`	`+ }`
	`63`	`+ }`
	`64`	`+ return result`
	`65`	`+ }`
	`66`	`+}`
	`67`	+```

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