vault backup: 2026-05-14 23:42:03

2026-05-14 23:42:03 +08:00
parent 712dcbd6f8
commit fcebcf92a6
3 changed files with 147 additions and 4 deletions
@@ -562,10 +562,9 @@ func rotateLeft(nums []int, k int) {
 	}
 	k %= n

-	reverse(nums, 0, k-1)   // Step 1: 反转前 k 个  [5,6,7, 1,2,3,4] → [7,6,5, 1,2,3,4]
-	reverse(nums, k, n-1)   // Step 2: 反转剩余部分  [7,6,5, 1,2,3,4] → [7,6,5, 4,3,2,1]
-	reverse(nums, 0, n-1)   // Step 3: 整体反转      [7,6,5, 4,3,2,1] → [1,2,3,4,5,6,7] ← 恢复！
-	// 上面用的是 k=3 的示例，实际上对 [1,2,3,4,5,6,7] 左旋 3 位的结果是 [4,5,6,7,1,2,3]
+	reverse(nums, 0, k-1)   // Step 1: 反转前 k 个  [3,2,1, 4,5,6,7]
+	reverse(nums, k, n-1)   // Step 2: 反转剩余部分  [3,2,1, 7,6,5,4]
+	reverse(nums, 0, n-1)   // Step 3: 整体反转      [4,5,6,7, 1,2,3] ← [1,2,3,4,5,6,7] 左旋 3 位的结果
 }

 // rotateCyclicLeft 使用循环替换实现向左轮转数组。