添加 0860.柠檬水找零.md Scala版本

problems/0860.柠檬水找零.md

@@ -328,6 +328,37 @@ function lemonadeChange(bills: number[]): boolean {
 ```
 
 
+### Scala
+
+```scala
+object Solution {
+  def lemonadeChange(bills: Array[Int]): Boolean = {
+    var fiveNum = 0
+    var tenNum = 0
+
+    for (i <- bills) {
+      if (i == 5) fiveNum += 1
+      if (i == 10) {
+        if (fiveNum <= 0) return false
+        tenNum += 1
+        fiveNum -= 1
+      }
+      if (i == 20) {
+        if (fiveNum > 0 && tenNum > 0) {
+          tenNum -= 1
+          fiveNum -= 1
+        } else if (fiveNum >= 3) {
+          fiveNum -= 3
+        } else {
+          return false
+        }
+      }
+    }
+    true
+  }
+}
+```
+
 
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