Merge pull request #1502 from wzqwtt/dp08

添加 （背包问题理论基础完全背包、0518.零钱兑换II） Scala版本

problems/0518.零钱兑换II.md

@@ -289,7 +289,22 @@ function change(amount: number, coins: number[]): number {
 };
 ```
 
+Scala:
 
+```scala
+object Solution {
+  def change(amount: Int, coins: Array[Int]): Int = {
+    var dp = new Array[Int](amount + 1)
+    dp(0) = 1
+    for (i <- 0 until coins.length) {
+      for (j <- coins(i) to amount) {
+        dp(j) += dp(j - coins(i))
+      }
+    }
+    dp(amount)
+  }
+}
+```
 
 -----------------------
 <div align="center"><img src=https://code-thinking.cdn.bcebos.com/pics/01二维码一.jpg width=500> </img></div>

problems/背包问题理论基础完全背包.md

@@ -359,7 +359,27 @@ function test_CompletePack(): void {
 test_CompletePack();
 ```
 
+Scala:
 
+```scala
+// 先遍历物品，再遍历背包容量
+object Solution {
+  def test_CompletePack() {
+    var weight = Array[Int](1, 3, 4)
+    var value = Array[Int](15, 20, 30)
+    var baseweight = 4
+
+    var dp = new Array[Int](baseweight + 1)
+
+    for (i <- 0 until weight.length) {
+      for (j <- weight(i) to baseweight) {
+        dp(j) = math.max(dp(j), dp(j - weight(i)) + value(i))
+      }
+    }
+    dp(baseweight)
+  }
+}
+```
 
 
 -----------------------