class Solution { public int[] twoSum(int[] nums, int target) // .. } } Practice 2 Given an array of integers, return indices of the two Keys such that they add up to a specific target. You may assume that each input would have exactly one solution, and you may not use the same element twice. Example: Given nums = [2, 7, 11, 15]), target = 9, Because nums[0] + nums[1] = 2 +7= 9, return [0, 1]. Note: [0, 1] and [1, 0] are equivalent, and you only need to return one of them.
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- Write method findZero, as started below. findZero should return the index of the first element of array A that contains the value zero, starting from position 0 up through position pos. If no element of A from position 0 to position pos contains the value zero, then findZero should return –1. For example:(in java) Array (A) Position (pos) Value returned by findZero(A, pos) 1 0 2 5 6 0 -1 1 0 2 5 6 1 1 1 0 2 5 6 2 1 1 0 2 0 6 2 1 1 0 2 0 6 4 1 1 2 3 4 5 4 -1 Complete method findZero below. Assume that it is called only with values that satisfy its assumptions as stated below. // Description: Returns smallest index k // such that (0 <= k <= pos) and (A[k] == 0) // Assumptions: 0 <= pos < A.length public int findZero(int[] A, int pos) {public static void reverseAscendingSubarrays(int[] items) Rearrange the elements of the given array of integers in place (that is, do not create and return a new array) so that the elements of every maximal strictly ascending subarray are reversed. For example, given the array {5, 7, 10, 4, 2, 7, 8, 1, 3}, after executing this method, the elements of the array would be {10, 7, 5, 4, 8, 7, 2, 3, 1}. Given another argument array {5, 4, 3, 2, 1}, the contents of that array would stay as {5, 4, 3, 2, 1} seeing that its each element is a maximal ascending subarray of length one. public static String pancakeScramble(String text) This nifty little problem is taken from the excellent Wolfram Challenges problem site where you can also see examples of what the result should be for various arguments. Given a text string, construct a new string by reversing its first two characters, then reversing the first three characters of that, and so on, until the last round where you reverse your entire…URGENT JAVA Write a Java method that takes two 2 dimensional int arrays (a and b) and a 2 dimensional boolean array (c) where all three arrays have the same size. Your method should return an array (result) such that, if a partic- ular element in c is true, then the corresponding (same indexed) element in result must be the multiplication of the the corresponding elements of a and b. If the element in c is false, then the the corresponding element in result must be the negative of multiplication of the the corresponding element in a and b. For example ifa = {{1,2,3},{4,5}},b = {{1,2,1},{0,2}} andc = {{true,false,true},{false,true}}, then the result should be result={{1, -4, 3}{0, 10}}.
- 6. In Java Write a static method transpose() that receives as parameter, a 2D square array numArof integers, and swaps the row and column of each element. For example:6 7 8 0 6 3 1 23 2 4 5 → 7 2 5 01 5 8 2 8 4 8 92 0 9 3 0 5 2 3Hint: Once you find the largest-sum column, you will need to swap its entries with the first column,element-by-element.PLZ help with the following in Java try abd keep it simple so i can understand You have a long flowerbed in which some of the plots are planted, and some are not. However, flowers cannot be planted inadjacent plots.Given an integer array flowerbed containing 0's and 1's, where 0 means empty and 1 means not empty, and an integer n, return ifn new flowers can be planted in the flowerbed without violating the no-adjacent-flowers rule. Example 1: Input: flowerbed = [1,0,0,0,1], n = 1 Output: true Example 2: Input: flowerbed = [1,0,0,0,1], n = 2 Output: false Constraints: 1 <= flowerbed.length <= 2 * 104 • flowered [i] is 0 or 1. • There are no two adjacent flowers in flowerbed. 0 <= n <= flowerbed.lengthIn Javascript, write code that prints the FIRST NAMES ONLY of people who have BOTH above average English grades AND below average age. Special conditions: Cannot use any array type built-in functions except filter(), map(), and reduce().
- The split method in the String class returns an array of strings consisting of the substrings split by the delimiters. However, the delimiters are not returned. Implement the following new method that returns an array of strings consisting of the substrings split by the matching delimiters, including the matching delimiters. public static String[] split(String s, String regex) For example, split("ab#12#453", "#") returns ab, #, 12, #, and 453 in an array of String and split("a?b?gf#e", "[?#]") returns a, ?, b, ?, gf, #, and e in an array of String.please help me public static void main(String args[]){ int[] x={1,4,88,9,13,77,4,18}; for(int i=0;i<x.length;i++){ for( int j=i+1;j<x.length;j++){ if(x[i]==x[j]){ System.out.println("duplicates exists is : "+x[i]); }}} System.out.println("no duplication"); } The above segment of code is searching the duplicated values inside an array, where the complexity is O(n). Suggest another solution for the above problem with less time complexity.code: import java.util.Random;import java.util.ArrayList;import java.util.Scanner;public class WeekendOrders {/*** * This method takes as input the scanner instance created from main and* asks the user for input on the number of orders placed on each of the * days on the long weekend (Saturday, Sunday, and Monday). * Put the number of orders for each day in an array of fixed size* * * @param scnr (an instance of Scanner)* @return an array of int which includes the number of orders* placed on each day, with one day per index of the array*/public static int[] getUserInput(Scanner scnr){// DO NOT MODIFY THIS LINEint[] userInput = new int[3];// TODO: Prompt user for input on number of orders on each day// and store in userInputreturn userInput; }/*** * This method appends all the new orders for the given day onto the * arraylist. It first generates a random int between 0-2 (inclusive).* If the int is 0: it adds "Burger" to the prevOrders list* If the int is 1: it adds "Fries" to the…
- Write method findZero, as started below. findZero should return the index of the first element of array A that contains the value zero, starting from position 0 up through position pos. If no element of A from position 0 to position pos contains the value zero, then findZero should return –1. For example: Array (A) Position (pos) Value returned by findZero(A, pos) 1 0 2 5 6 0 -1 1 0 2 5 6 1 1 1 0 2 5 6 2 1 1 0 2 0 6 2 1 1 0 2 0 6 4 1 1 2 3 4 5 4 -1 Complete method findZero below. Assume that it is called only with values that satisfy its assumptions as stated below. // Description: Returns smallest index k // such that (0 <= k <= pos) and (A[k] == 0) // Assumptions: 0 <= pos < A.length public int findZero(int[] A, int pos) {Suppose that you are playing a card game whose goal is to collect exactly k cards with a total value of t. Write a solution that can determine if it is possible for a given collection of cards whose values are given in the array values. For example, if the array contained the values <10,5,7,2>, k = 3, and t = 12, you would return false because no three values add to 12. However, if t = 14, you would return true, since 5 + 7 + 2 = 14. So I considered this to be a form of groupSum recursion, so I try to implement it in recursion form. However, since the passing parameters are not the incrementing level index but 'k' that is the limit number of the numbers we can choose from the array, I cannot use passing index through recursion to search from the start of the array toward the end of the values.length(the length of the array). would there be any method I can use to increment and search along the array using k, the number of numbers we can add into the total(t) instead of the…Define a class Car as follows:class Car { public String make; public String model; public int mpg;// Miles per gallon}a) Implement a comparator called CompareCarsByMakeThenModel that can be passed as an argument to the quicksort method from the lecture notes. CompareCarsByMakeThenModel should return a value that will cause quicksort to sort an array of cars in ascending order (from smallest to largest) by make and, when two cars have the same make, in ascending order by model.b) Implement a comparator called CompareCarsByDescendingMPG that can be passed as an argument to the quicksort method from the lecture notes. CompareCarsByDescendingMPG should return a value that will cause quicksort to sort an array of cars in descending order (from largest to smallest) by mpg.c) Implement a comparator called CompareCarsByMakeThenDescendingMPG that can be passed as an argument to the quicksort method from the lecture notes.…