Search a 2D Matrix
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Search a 2D Matrix
Write an efficient algorithm that searches for a value in an m x n matrix. This matrix has the following properties:
- Integers in each row are sorted from left to right.
- The first integer of each row is greater than the last integer of the previous row.
For example,
Consider the following matrix:
[ [1, 3, 5, 7], [10, 11, 16, 20], [23, 30, 34, 50]]
Given target = 3
, return true
.
discussion里的高票解法:https://discuss.leetcode.com/topic/3227/don-t-treat-it-as-a-2d-matrix-just-treat-it-as-a-sorted-list
把矩阵当成一个排好序的序列,matrix[i][j]=a[i*m+j],其中矩阵大小是n*m的。反过来,a[x]=a[x/m][x%m]。
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- Search a 2D Matrix
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