[Daily Leetcode] 463. Island Perimeter

You are given a map in form of a two-dimensional integer grid where 1 represents land and 0 represents water. Grid cells are connected horizontally/vertically (not diagonally). The grid is completely surrounded by water, and there is exactly one island (i.e., one or more connected land cells). The island doesn’t have “lakes” (water inside that […]

[Daily Leetcode] 566. Reshape the Matrix

Question: In MATLAB, there is a very useful function called ‘reshape’, which can reshape a matrix into a new one with different size but keep its original data. You’re given a matrix represented by a two-dimensional array, and two positive integers r and c representing the row number and column number of the wanted reshaped […]

[Daily Leetcode]500. Keyboard Row

Question: Given a List of words, return the words that can be typed using letters of alphabet on only one row’s of American keyboard like the image below. Example 1: Input: [“Hello”, “Alaska”, “Dad”, “Peace”] Output: [“Alaska”, “Dad”] Note: You may use one character in the keyboard more than once. You may assume the input […]