1582. Special Positions in a Binary Matrix 解题方法 设置一个字典记录矩阵中1的位置,遍历字典中的键,判断纵向和横向上的坐标是否在字典中,且不是该点,如果都没有就把它记录为满足条件的点。 时间复杂度:O(mn) 空间复杂度:O(mn) 代码 class Solution: def numSpecial(self, mat: List[List[int]]) ->...
Given arows x colsmatrixmat, wheremat[i][j]is either0or1, returnthe number of special positions inmat. A position(i,j)is called special ifmat[i][j] == 1and all other elements in rowiand columnjare0(rows and columns are 0-indexed). Example 1: Input: mat = [[1,0,0], [0,0...
:1582-special-positions-in-a-binary-matrix.py, 2482-difference-between-ones-and-zeros-in-row-and-column.py, 1475-final-prices-with-a-special-discount-in-a-shop.py Language(s) Used:python Submission URL:https://leetcode.com/problems/special-positions-in-a-binary-matrix/submissions/1118605153/...
leetcode 1582. Special Positions in a Binary Matrix(python) 描述Given a rows x cols matrix mat, where mat[i][j] is either 0 or 1, return the number of special positions in mat. A position (i,j) is called special if mat[i][j] == 1 and all other elements in row i......
Given an m x n binary matrix mat, return the number of special positions in mat. A position (i, j) is called special if mat[i][j] == 1 and all other e