diff --git a/problems/0746.使用最小花费爬楼梯.md b/problems/0746.使用最小花费爬楼梯.md
index f11439c0..31e7bd48 100644
--- a/problems/0746.使用最小花费爬楼梯.md
+++ b/problems/0746.使用最小花费爬楼梯.md
@@ -318,7 +318,7 @@ func min(a, b int) int {
 var minCostClimbingStairs = function(cost) {
   const dp = [0, 0]
   for (let i = 2; i <= cost.length; ++i) {
-    dp[i] = Math.min(dp[i -1] + cost[i - 1], dp[i - 2] + cost[i - 2])
+    dp[i] = Math.min(dp[i - 1] + cost[i - 1], dp[i - 2] + cost[i - 2])
   }
   return dp[cost.length]
 };