添加 0045.跳跃游戏II.md Scala版本

problems/0045.跳跃游戏II.md

@@ -279,7 +279,31 @@ function jump(nums: number[]): number {
 };
 ```
 
+### Scala
 
+```scala
+object Solution {
+  def jump(nums: Array[Int]): Int = {
+    if (nums.length == 0) return 0
+    var result = 0 // 记录走的最大步数
+    var curDistance = 0 // 当前覆盖最远距离下标
+    var nextDistance = 0 // 下一步覆盖最远距离下标
+    for (i <- nums.indices) {
+      nextDistance = math.max(nums(i) + i, nextDistance) // 更新下一步覆盖最远距离下标
+      if (i == curDistance) {
+        if (curDistance != nums.length - 1) {
+          result += 1
+          curDistance = nextDistance
+          if (nextDistance >= nums.length - 1) return result
+        } else {
+          return result
+        }
+      }
+    }
+    result
+  }
+}
+```