Merge pull request youngyangyang04#2516 from kankan-web/master

Update 0770.爬楼梯完全背包版

problems/0070.爬楼梯完全背包版本.md

@@ -211,10 +211,33 @@ func main() {
 ```
 
 ### JavaScript:
-
+```javaScript
+var climbStairs = function (n) {
+  let dp = new Array(n + 1).fill(0);
+  dp[0] = 1;
+  // 排列题，注意循环顺序，背包在外物品在内
+   for (let j = 1; j <= n; j++) {//遍历背包
+    for (let i = 1; i <= 2; i++) {//遍历物品
+     if (j - i >= 0) dp[j] = dp[j] + dp[j - i];
+    }
+  }
+  return dp[n];
+}
+```
 
 ### TypeScript：
-
+```typescript
+var climbStairs = function (n: number): number {
+    let dp: number[] = new Array(n + 1).fill(0);
+    dp[0] = 1;
+    for (let j = 1; j <= n; j++) {//遍历背包
+        for (let i = 1; i <= 2; i++) {//遍历物品
+            if (j - i >= 0) dp[j] = dp[j] + dp[j - i];
+        }
+    }
+    return dp[n];
+}
+```
 
 ### Rust: