Merge pull request #1476 from wzqwtt/greedy06

添加（0452.用最少数量的箭引爆气球、0435.无重叠区间、0763.划分字母区间） Scala版本

problems/0435.无重叠区间.md

@@ -352,7 +352,27 @@ function eraseOverlapIntervals(intervals: number[][]): number {
 };
 ```
 
+### Scala
 
+```scala
+object Solution {
+  def eraseOverlapIntervals(intervals: Array[Array[Int]]): Int = {
+    var result = 0
+    var interval = intervals.sortWith((a, b) => {
+      a(1) < b(1)
+    })
+    var edge = Int.MinValue
+    for (i <- 0 until interval.length) {
+      if (edge <= interval(i)(0)) {
+        edge = interval(i)(1)
+      } else {
+        result += 1
+      }
+    }
+    result
+  }
+}
+```
 
 
 

problems/0452.用最少数量的箭引爆气球.md

@@ -299,5 +299,30 @@ impl Solution {
     }
 }
 ```
+
+### Scala
+
+```scala
+object Solution {
+  def findMinArrowShots(points: Array[Array[Int]]): Int = {
+    if (points.length == 0) return 0
+    // 排序
+    var point = points.sortWith((a, b) => {
+      a(0) < b(0)
+    })
+
+    var result = 1 // points不为空就至少需要一只箭
+    for (i <- 1 until point.length) {
+      if (point(i)(0) > point(i - 1)(1)) {
+        result += 1
+      } else {
+        point(i)(1) = math.min(point(i - 1)(1), point(i)(1))
+      }
+    }
+    result // 返回结果
+  }
+}
+```
+
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 <div align="center"><img src=https://code-thinking.cdn.bcebos.com/pics/01二维码一.jpg width=500> </img></div>

problems/0763.划分字母区间.md

@@ -317,7 +317,31 @@ function partitionLabels(s: string): number[] {
 };
 ```
 
+### Scala
 
+```scala
+object Solution {
+  import scala.collection.mutable
+  def partitionLabels(s: String): List[Int] = {
+    var hash = new Array[Int](26)
+    for (i <- s.indices) {
+      hash(s(i) - 'a') = i
+    }
+
+    var res = mutable.ListBuffer[Int]()
+    var (left, right) = (0, 0)
+    for (i <- s.indices) {
+      right = math.max(hash(s(i) - 'a'), right)
+      if (i == right) {
+        res.append(right - left + 1)
+        left = i + 1
+      }
+    }
+
+    res.toList
+  }
+}
+```
 
 
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