0070.爬楼梯JavaScript代码更新

原代码貌似不是本题的哦

problems/0070.爬楼梯完全背包版本.md

@@ -187,12 +187,14 @@ func climbStairs(n int) int {
 JavaScript:
 ```javascript
 var climbStairs = function(n) {
-    const dp = new Array(n+1).fill(0);
+    const dp = new Array(n + 1).fill(0);
-    const weight = [1,2];
+    const m = 2;
     dp[0] = 1;
-    for(let i = 0; i <= n; i++){ //先遍历背包
+    for(let i = 1; i <= n; i++){
-        for(let j = 0; j < weight.length; j++){ // 再遍历物品
+        for(let j = 1; j <= m; j++){
-            if(i >= weight[j]) dp[i] += dp[i-weight[j]];
+            if(i >= j) {
+	    	dp[i] += dp[i - j];
+	     }
         }
     }
     return dp[n];