diff --git a/problems/0198.打家劫舍.md b/problems/0198.打家劫舍.md
index f49857bb..63a68c36 100644
--- a/problems/0198.打家劫舍.md
+++ b/problems/0198.打家劫舍.md
@@ -118,7 +118,7 @@ class Solution {
 		if (nums == null || nums.length == 0) return 0;
 		if (nums.length == 1) return nums[0];
 
-		int[] dp = new int[nums.length + 1];
+		int[] dp = new int[nums.length];
 		dp[0] = nums[0];
 		dp[1] = Math.max(dp[0], nums[1]);
 		for (int i = 2; i < nums.length; i++) {