Problem With respect to a given puzzle string, a word is valid if both the following conditions are satisfied: word contains the first letter of puzzle.For each letter in word, that letter is in puz
Problem 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
Problem Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements of [1, n] inclusive that do not appear in this arr
Problem Given an integer rowIndex, return the rowIndexth row of the Pascal’s triangle. Notice that the row index starts from 0. In Pascal’s triangle, each number is the sum of the two numbers direc