Find which element and Indices are equal 3.5 marks Problem Statement You are given a function, def ElementsAndIndices(arr): The function takes an integer array 'arr' of size 'n' as its arguments. Implement the function to find and return the number of array elements which are equal to their index value in array i.e. arr[k] = k, 0 <= k < n. Note: Indexing starts from 0. Return -1 if 'arr' is empty or None in case of python Example: Input: 10 1 12 3 5 8 9 7 12 23 Output: 3 Explanation: Index Element 0 10 1 1 2 12 3 3 4 5 5 8 6 9 7 7 8 12 9 23 Elements at index {1, 3, 7} are equal to their index values {1, 3, 7} respectively. Since, these are 3 elements, thus, output is 3. The custom input format for the above case: 10 10 1 12 3 5 8 9 7 12 23 (The first line represents the size of the array, the second line represents the elements of the array) Sample input -3 0 1 3 5 7 Sample Output 1 The custom input format for the above case: 6 -3 0 1 3 5 7 (The first line represents the size of the array, the second line represents the elements of the array) Instructions : This is a template based question, DO NOT write the "main" function. Your code is judged by an automated system, do not write any additional welcome/greeting messages. "Save and Test" only checks for basic test cases, more rigorous cases will be used to judge your code while scoring. Additional score will be given for writing optimized code both in terms of memory and execution time. give java code
Question
Find which element and Indices are equal 3.5 marks Problem Statement You are given a function, def ElementsAndIndices(arr):
The function takes an integer array 'arr' of size 'n' as its arguments. Implement the function to find and return the number of array elements which are equal to their index value in array i.e. arr[k] = k, 0 <= k < n. Note: Indexing starts from 0. Return -1 if 'arr' is empty or None in case of python
Example: Input: 10 1 12 3 5 8 9 7 12 23 Output: 3 Explanation: Index Element 0 10 1 1 2 12 3 3 4 5 5 8 6 9 7 7 8 12 9 23 Elements at index {1, 3, 7} are equal to their index values {1, 3, 7} respectively. Since, these are 3 elements, thus, output is 3.
The custom input format for the above case: 10 10 1 12 3 5 8 9 7 12 23 (The first line represents the size of the array, the second line represents the elements of the array) Sample input -3 0 1 3 5 7 Sample Output 1 The custom input format for the above case: 6 -3 0 1 3 5 7 (The first line represents the size of the array, the second line represents the elements of the array) Instructions : This is a template based question, DO NOT write the "main" function. Your code is judged by an automated system, do not write any additional welcome/greeting messages. "Save and Test" only checks for basic test cases, more rigorous cases will be used to judge your code while scoring. Additional score will be given for writing optimized code both in terms of memory and execution time. give java code
Solution
Here is the Java code to solve the problem:
public class Main {
public static int ElementsAndIndices(int[] arr) {
if (arr == null || arr.length == 0) {
return -1;
}
int count = 0;
for (int i = 0; i < arr.length; i++) {
if (arr[i] == i) {
count++;
}
}
return count;
}
public static void main(String[] args) {
int[] arr = {10, 1, 12, 3, 5, 8, 9, 7, 12, 23};
System.out.println(ElementsAndIndices(arr)); // Output: 3
int[] arr2 = {-3, 0, 1, 3, 5, 7};
System.out.println(ElementsAndIndices(arr2)); // Output: 1
}
}
This code defines a function ElementsAndIndices that takes an array of integers as input. If the array is null or empty, the function returns -1. Otherwise, it iterates over the array, comparing each element with its index. If they are equal, it increments a counter. Finally, it returns the counter, which represents the number of elements equal to their indices. The main function tests this function with two example arrays.
Similar Questions
Problem Statement You are given a function, static int ElementsAndIndices(int[] arr){} The function takes an integer array 'arr' of size 'n' as its arguments. Implement the function to find and return the number of array elements which are equal to their index value in array i.e. arr[k] = k, 0 <= k < n. Note: Indexing starts from 0. Return -1 if 'arr' is empty or None in case of python Example: Input: 10 1 12 3 5 8 9 7 12 23 Output: 3 Explanation: Index Element 0 10 1 1 2 12 3 3 4 5 5 8 6 9 7 7 8 12 9 23 Elements at index {1, 3, 7} are equal to their index values {1, 3, 7} respectively. Since, these are 3 elements, thus, output is 3. The custom input format for the above case: 10 10 1 12 3 5 8 9 7 12 23 (The first line represents the size of the array, the second line represents the elements of the array) Sample input -3 0 1 3 5 7 Sample Output 1 The custom input format for the above case: 6 -3 0 1 3 5 7 (The first line represents the size of the array, the second line represents the elements of the array) Instructions : This is a template based question, DO NOT write the "main" function. Your code is judged by an automated system, do not write any additional welcome/greeting messages. "Save and Test" only checks for basic test cases, more rigorous cases will be used to judge your code while scoring. Additional score will be given for writing optimized code both in terms of memory and execution time. Now let's start coding : Language: Java 17.0 Day Mode Read-only code below . . . 1 class SolutionClass { 2 public static void main(String[] args) throws java.lang.Exception { 3 //Input read from STDIN 4 int result = ElementsAndIndices(arr); 5 //Value in result printed to STDOUT 6 } 7 } 8 Write your code below . . . 9 static int ElementsAndIndices(int[] arr) throws java.lang.Exception 10 { 11 /* Write your code here. */ 12 } 13 14 15
Given an array Arr of N positive integers. Your task is to find the elements whose value is equal to that of its index value ( Consider 1-based indexing ).
What is the result of arr.index(5) if arr = [1, 3, 5, 7, 9]?Options204ValueError: 5 is not in list
You are given an integer array and an integer K. You have to tell if there exists a pair of integers in the given array such that ar[i]-ar[j]=K and i≠j.Input FormatThe first line of input contains T - the number of test cases. It's followed by 2T lines, the first line contains N and K - the size of the array and the number K. The second line contains the elements of the array.Output FormatFor each test case, print "true" if the arrays contains such elements, "false" otherwise, separated by new line.Constraints40 points2 <= N <= 100060 points2 <= N <= 100000General Constraints1 <= T <= 100-105 <= ar[i], K <= 105ExampleInput25 601 20 40 100 8010 1112 45 52 65 21 645 234 14 575 112Outputtruefalse
Given a one dimensional array arr, what is the correct way of getting the number of elements in arr is
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