1572. Matrix Diagonal SumEasy Topics Companies Hint Given a square matrix mat, return the sum of the matrix diagonals. Only include the sum of all the elements on the primary diagonal and all the elements on the
LeetCode #1572. Matrix Diagonal Sum 题目1572. Matrix Diagonal Sum解题方法遍历数组每次累加mat[i][j]和mat[i][len(mat)-1-j],如果j == len(mat) - 1 - j的话就去掉一个mat[i][j],最后返回Sum。 时间复杂度:O(mn) 空间复杂度:O(1)代码class Solution: def diagonalSum(self, mat: List[Lis...
1 class Solution { 2 public: 3 int diagonalSum(vector<vector<int>>& mat) { 4 int row=mat.size(); 5 int res=0; 6 for(int i=0;i<row;++i){ 7 res+=mat[i][i]+mat[i][row-i-1]; 8 } 9 if(row%2){ 10 res-=mat[row/2][row/2]; 11 } 12 return res; 13 } 14 }...
【leetcode】1572. Matrix Diagonal Sum 题目如下: Given a square matrixmat, return the sum of the matrix diagonals. Only include the sum of all the elements on the primary diagonal and all the elements on the secondary diagonal that are not part of the primary diagonal. Example 1: Input: m...
1329. Sort the Matrix Diagonally # 题目 # A matrix diagonal is a diagonal line of cells starting from some cell in either the topmost row or leftmost column and going in the bottom-right direction until reaching the matrix’s end. For example, the matr
A matrix isToeplitzif every diagonal from top-left to bottom-right has the same element. Now given anM x Nmatrix, returnTrueif and only if the matrix isToeplitz. Example 1: Input:matrix = [[1,2,3,4],[5,1,2,3],[9,5,1,2]]Output:TrueExplanation:1234 ...
方法: 先遍历主轴,再遍历次轴,然后判断是否有重叠的位置,然后删除重叠的位置,判断条件是列数是否为奇数。 classMatrixDiagonalSum{fundiagonalSum(mat:Array<IntArray>):Int{varsum=0for(indexinmat[0].indices){sum+=mat[index][index]}for(indexinmat[0].lastIndex downTo0){sum+=mat[index][mat.lastInd...