A matrix is Toeplitz if every diagonal from top-left to bottom-right has the same element.Now given an M x N matrix, return True if and only if the matrix is Toeplitz.
M x N
In a given integer array nums, there is always exactly one largest element.Find whether the largest element in the array is at least twice as much as every other number in the array.
On a staircase, the i-th step has some non-negative cost cost[i] assigned (0 indexed).
Given an array of integers nums, write a method that returns the “pivot” index of this array.
We have two special characters. The first character can be represented by one bit 0. The second character can be represented by two bits (10 or 11).
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