1198. Find Smallest Common Element in All Rows
https://leetcode.com/problems/find-smallest-common-element-in-all-rows
Description
Given an m x n
matrix mat
where every row is sorted in strictly increasing order, return the smallest common element in all rows.
If there is no common element, return -1
.
Example 1:
**Input:** mat = [[1,2,3,4,5],[2,4,5,8,10],[3,5,7,9,11],[1,3,5,7,9]]
**Output:** 5
Example 2:
**Input:** mat = [[1,2,3],[2,3,4],[2,3,5]]
**Output:** 2
Constraints:
m == mat.length
n == mat[i].length
1 <= m, n <= 500
1 <= mat[i][j] <= 104
mat[i]
is sorted in strictly increasing order.
ac
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