Commit d756f80

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feat: add swift implementation to lcp problem: No.50 (#3785)

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Original file line number	Diff line number	Diff line change
`@@ -154,6 +154,27 @@ function giveGem(gem: number[], operations: number[][]): number {`
`154`	`154`	`}`
`155`	`155`	```
`156`	`156`
	`157`	`+#### Swift`
	`158`	`+`
	`159`	+```swift
	`160`	`+class Solution {`
	`161`	`+ func giveGem(_ gem: [Int], _ operations: [[Int]]) -> Int {`
	`162`	`+ var gem = gem`
	`163`	`+`
	`164`	`+ for op in operations {`
	`165`	`+ let x = op[0], y = op[1]`
	`166`	`+ let v = gem[x] / 2`
	`167`	`+ gem[y] += v`
	`168`	`+ gem[x] -= v`
	`169`	`+ }`
	`170`	`+`
	`171`	`+ let maxGem = gem.max() ?? 0`
	`172`	`+ let minGem = gem.min() ?? 0`
	`173`	`+ return maxGem - minGem`
	`174`	`+ }`
	`175`	`+}`
	`176`	+```
	`177`	`+`
`157`	`178`	`<!-- tabs:end -->`
`158`	`179`
`159`	`180`	`<!-- solution:end -->`

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Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,16 @@`
	`1`	`+class Solution {`
	`2`	`+ func giveGem(_ gem: [Int], _ operations: [[Int]]) -> Int {`
	`3`	`+ var gem = gem`
	`4`	`+`
	`5`	`+ for op in operations {`
	`6`	`+ let x = op[0], y = op[1]`
	`7`	`+ let v = gem[x] / 2`
	`8`	`+ gem[y] += v`
	`9`	`+ gem[x] -= v`
	`10`	`+ }`
	`11`	`+`
	`12`	`+ let maxGem = gem.max() ?? 0`
	`13`	`+ let minGem = gem.min() ?? 0`
	`14`	`+ return maxGem - minGem`
	`15`	`+ }`
	`16`	`+}`

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