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添加 0763.划分字母区间.md Scala版本

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`@@ -317,7 +317,31 @@ function partitionLabels(s: string): number[] {`
`317`	`317`	`};`
`318`	`318`	```
`319`	`319`
	`320`	`+### Scala`
	`321`	`+`
	`322`	+```scala
	`323`	`+object Solution {`
	`324`	`+ import scala.collection.mutable`
	`325`	`+ def partitionLabels(s: String): List[Int] = {`
	`326`	`+ var hash = new Array[Int](26)`
	`327`	`+ for (i <- s.indices) {`
	`328`	`+ hash(s(i) - 'a') = i`
	`329`	`+ }`
	`330`	`+`
	`331`	`+ var res = mutable.ListBuffer[Int]()`
	`332`	`+ var (left, right) = (0, 0)`
	`333`	`+ for (i <- s.indices) {`
	`334`	`+ right = math.max(hash(s(i) - 'a'), right)`
	`335`	`+ if (i == right) {`
	`336`	`+ res.append(right - left + 1)`
	`337`	`+ left = i + 1`
	`338`	`+ }`
	`339`	`+ }`
`320`	`340`
	`341`	`+ res.toList`
	`342`	`+ }`
	`343`	`+}`
	`344`	+```
`321`	`345`
`322`	`346`
`323`	`347`	`-----------------------`

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