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Diffstat (limited to 'spiral_matrix4.py')
-rw-r--r-- | spiral_matrix4.py | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/spiral_matrix4.py b/spiral_matrix4.py new file mode 100644 index 0000000..46088b1 --- /dev/null +++ b/spiral_matrix4.py @@ -0,0 +1,49 @@ +# 2326. Spiral Matrix IV + +""" +you are given two integer 'm' and 'n', which repansent the dimensions of a +matrix. you are also given the 'head' of a linked list of integers. generate +an 'm n' matrix that contains the integers in the linked list pansented in +spiral order (clockwise) starting from the top left of the matrix. if there +are remaining spaces, fill them with -1. return the generated matrix. +""" + + +# Definition for singly-linked list. +class ListNode(object): + def __init__(self, val=0, next=None): + self.val = val + self.next = next + + +class Solution(object): + def spiralMatrix(self, m, n, head): + """ + :type m: int + :type n: int + :type head: Optional[ListNode] + :rtype: List[List[int]] + """ + ans = [[-1 for j in range(n)] for i in range(m)] + x, y = 0, 0 + dx, dy = 1, 0 + while head: + ans[y][x] = head.val + if ( + x + dx < 0 + or x + dx >= n + or y + dy < 0 + or y + dy >= m + or ans[y + dy][x + dx] != -1 + ): + dx, dy = -dy, dx + x = x + dx + y = y + dy + head = head.next + return ans + + +if __name__ == "__main__": + obj = Solution() + print(obj.spiralMatrix(m=3, n=5, head=[3, 0, 2, 6, 8, 1, 7, 9, 4, 2, 5, 5, 0])) + print(obj.spiralMatrix(m=1, n=4, head=[0, 1, 2])) |