How to Validate a Perfect Number (Integer)?
We define the Perfect Number is a positive integer that is equal to the sum of all its positive divisors except itself. Now, given an integer n, write a …
Category: algorithms
Binary Prefix Divisible By 5 – Java/C++ Coding Exercise
Given an array A of 0s and 1s, consider N_i: the i-th subarray from A to A interpreted as a binary number (from most-significant-bit to least-significant-bit.) Return a list …
How to Check if a Matrix is a Toeplitz Matrix?
Given a two-dimensional matrix of integers matrix, determine whether it’s a Toeplitz matrix. A Toeplitz is one where every diagonal descending from left to right has the same value. …
How to Uncommon Words from Two Sentences in Java?
We are given two sentences A and B. (A sentence is a string of space separated words. Each word consists only of lowercase letters.) A word is uncommon if …
How to Compute the Number Complement for Integers?
Given a positive integer, output its complement number. The complement strategy is to flip the bits of its binary representation. The given integer is guaranteed to fit within the …