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https://github.com/youngyangyang04/leetcode-master.git
synced 2025-07-07 15:45:40 +08:00
@ -306,6 +306,47 @@ class Solution(object):
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return result
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```
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版本二:定义四个边界
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```python
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class Solution(object):
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def spiralOrder(self, matrix):
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"""
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:type matrix: List[List[int]]
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:rtype: List[int]
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"""
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if not matrix:
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return []
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rows = len(matrix)
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cols = len(matrix[0])
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top, bottom, left, right = 0, rows - 1, 0, cols - 1
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print_list = []
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while top <= bottom and left <= right:
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# 从左到右
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for i in range(left, right + 1):
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print_list.append(matrix[top][i])
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top += 1
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# 从上到下
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for i in range(top, bottom + 1):
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print_list.append(matrix[i][right])
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right -= 1
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# 从右到左
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if top <= bottom:
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for i in range(right, left - 1, -1):
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print_list.append(matrix[bottom][i])
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bottom -= 1
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# 从下到上
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if left <= right:
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for i in range(bottom, top - 1, -1):
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print_list.append(matrix[i][left])
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left += 1
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return print_list
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```
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<p align="center">
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@ -207,6 +207,50 @@ class Solution:
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return nums
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```
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版本二:定义四个边界
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```python
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class Solution(object):
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def generateMatrix(self, n):
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if n <= 0:
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return []
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# 初始化 n x n 矩阵
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matrix = [[0]*n for _ in range(n)]
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# 初始化边界和起始值
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top, bottom, left, right = 0, n-1, 0, n-1
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num = 1
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while top <= bottom and left <= right:
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# 从左到右填充上边界
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for i in range(left, right + 1):
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matrix[top][i] = num
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num += 1
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top += 1
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# 从上到下填充右边界
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for i in range(top, bottom + 1):
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matrix[i][right] = num
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num += 1
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right -= 1
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# 从右到左填充下边界
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for i in range(right, left - 1, -1):
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matrix[bottom][i] = num
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num += 1
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bottom -= 1
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# 从下到上填充左边界
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for i in range(bottom, top - 1, -1):
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matrix[i][left] = num
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num += 1
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left += 1
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return matrix
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```
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### JavaScript:
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```javascript
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Reference in New Issue
Block a user