LeetCode #1380. Lucky Numbers in a Matrix
作者:互联网
题目
1380. Lucky Numbers in a Matrix
解题方法
遍历矩阵,将每一行的最小值存入字典,键为行下标,值为列下标。然后遍历字典的键,再遍历它所在的列,如果不是最小值就break当前循环,否则循环结束后把这个lucky number加到返回值rat中。
时间复杂度:O(mn)
空间复杂度:O(m)
代码
class Solution:
def luckyNumbers (self, matrix: List[List[int]]) -> List[int]:
dic = {}
for i in range(len(matrix)):
tempmin = matrix[i][0]
dic[i] = 0
for j in range(1, len(matrix[i])):
if matrix[i][j] < tempmin:
tempmin = matrix[i][j]
dic[i] = j
rat = []
for key in dic.keys():
for i in range(len(matrix)):
if matrix[i][dic[key]] > matrix[key][dic[key]]:
break
else:
rat.append(matrix[key][dic[key]])
return rat
标签:matrix,List,dic,tempmin,rat,key,1380,LeetCode,Matrix 来源: https://www.cnblogs.com/RatsCommander/p/14048517.html