bijay-shrestha

/**
 * * A Nice array is defined to be an array where for every value n in the array, there is also an
 * * element n-1 or n+1 in the array.
 * *
 * * For example, {2, 10, 9, 3} is a Nice array because
 * * 2 = 3-1
 * * 10 = 9+1
 * * 3 = 2 + 1
 * * 9 = 10 -1
 * * Other Nice arrays include {2, 2, 3, 3, 3}, {1, 1, 1, 2, 1, 1} and {0, -1, 1}.

bijay-shrestha

/**
 * Print Triangle of Ones.
 */
package com.basic.practice;

public class TriangleOfOne {
    public static void main(String[] args) {
        for (int i = 0; i < 5; i++) {
            for (int j = 0; j <= i; j++) {
                System.out.print("1");

bijay-shrestha

/**
 * * A wave array is defined to an array which does not contain two even numbers or two odd
 * * numbers in adjacent locations. So {7, 2, 9, 10, 5}, {4, 11, 12, 1, 6}, {1, 0, 5} and {2} are all wave
 * * arrays. But {2, 6, 3, 4} is not a wave array because the even numbers 2 and 6 are adjacent to each
 * * other.
 * *
 * * Write a function named isWave that returns 1 if its array argument is a Wave array, otherwise it
 * * returns 0.
 * *
 * * If you are programming in Java, the function signature is

bijay-shrestha

/**
 *
 * * Given an integer x, return true if x is palindrome integer.
 * *
 * * An integer is a palindrome when it reads the same backward as forward. For example, 121 is palindrome while 123 is not.
 * *
 * * Example 1:
 * * Input: x = 121
 * * Output: true
 * *

bijay-shrestha

/**
 * * Given a signed 32-bit integer x, return x with its digits reversed.
 * * If reversing x causes the value to go outside the signed 32-bit integer range [-231, 231 - 1], then return 0.
 * *
 * * Assume the environment does not allow you to store 64-bit integers (signed or unsigned).
 * *
 * * Example 1:
 * * Input: x = 123
 * * Output: 321
 * *

bijay-shrestha

/**
 * * Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target.
 * *
 * * You may assume that each input would have exactly one solution, and you may not use the same element twice.
 * *
 * * You can return the answer in any order.
 * *
 * * Example 1:
 * * Input: nums = [2,7,11,15], target = 9
 * * Output: [0,1]

bijay-shrestha

/**
 * * Given an integer array nums sorted in non-decreasing order, return an array of the squares of each number sorted in non-decreasing order.
 * * Example 1:
 * *
 * * Input: nums = [-4,-1,0,3,10]
 * * Output: [0,1,9,16,100]
 * * Explanation: After squaring, the array becomes [16,1,0,9,100].
 * * After sorting, it becomes [0,1,9,16,100].
 * *
 * * Example 2:

bijay-shrestha

/**
 * * Given an array nums of integers, return how many of them contain an even number of digits.
 * *
 * * Example 1:
 * * Input: nums = [12,345,2,6,7896]
 * * Output: 2
 * * Explanation:
 * *  - 12 contains 2 digits (even number of digits).
 * *  - 345 contains 3 digits (odd number of digits).
 * *  - 2 contains 1 digit (odd number of digits).

bijay-shrestha

/**
 * * A Meera array is an array that contains the value 0 if and only if it contains a prime number.
 * *
 * * The array {7, 6, 0, 10, 1} is a Meera array because it contains a prime number (7)
 * * and also contains a 0. The array {6, 10, 1} is a Meera array because it contains no prime
 * * number and also contains no 0.
 * *
 * * The array {7, 6, 10} is not a Meera array because it contains a prime number (7) but does
 * * not contain a 0.
 * *

bijay-shrestha

/**
 * * A Bean array is defined to be an array where for every value n in the array, there is
 * * also an element n-1 or n+1 in the array.
 * * For example, {2, 10, 9, 3} is a Bean array because
 * *   2 = 3-1
 * *   10 = 9+1
 * *   3 = 2 + 1
 * *   9 = 10 -1
 * * Other Bean arrays include {2, 2, 3, 3, 3}, {1, 1, 1, 2, 1, 1} and {0, -1, 1}.
 * *