diff --git a/problems/0070.爬楼梯完全背包版本.md b/problems/0070.爬楼梯完全背包版本.md
index 0da1ebec..26af2569 100644
--- a/problems/0070.爬楼梯完全背包版本.md
+++ b/problems/0070.爬楼梯完全背包版本.md
@@ -100,8 +100,8 @@ int main() {
     while (cin >> n >> m) {
         vector<int> dp(n + 1, 0);
         dp[0] = 1;
-        for (int i = 1; i <= n; i++) { // 遍历物品
-            for (int j = 1; j <= m; j++) { // 遍历背包
+        for (int i = 1; i <= n; i++) { // 遍历背包
+            for (int j = 1; j <= m; j++) { // 遍历物品
                 if (i - j >= 0) dp[i] += dp[i - j];
             }
         }