[LeetCode] 1198. Find Smallest Common Element in All Rows
Given an m x n matrix mat where every row is sorted in strictly increasing order, return the smallest common element in all rows ...
原文：【leetcode&CN&竞赛】1198.Find Smallest Common Element in All Rows
题目如下： 给你一个矩阵mat，其中每一行的元素都已经按递增顺序排好了。请你帮忙找出在所有这些行中最小的公共元素。 如果矩阵中没有这样的公共元素，就请返回 。 示例： 提示： lt mat.length, mat i .length lt lt mat i j lt mat i 已按递增顺序排列。 解题思路：我最初的想法遍历整个矩阵，记录每一个值出现的个数，如果某个值出现的次数恰好等于矩阵的行数， ...
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