Which sorting algorithm can help find the second largest number from an array of integers in least time complexity?

Which sorting algorithm can help find the second largest number from an array of integers in least time complexity?

Use Bubble sort or Selection sort algorithm which sorts the array in descending order. Don’t sort the array completely. Just two passes. First pass gives the largest element and second pass will give you the second largest element.

How do you find the second largest number in an array without sorting?

Let’s see the full example to find the second largest number in java array.

1. public class SecondLargestInArrayExample{
2. public static int getSecondLargest(int[] a, int total){
3. int temp;
4. for (int i = 0; i < total; i++)
5. {
6. for (int j = i + 1; j < total; j++)
7. {
8. if (a[i] > a[j])

How do you find the second highest number?

How do you find the first largest number in an array?

To find the largest element,

1. the first two elements of array are checked and the largest of these two elements are placed in arr[0]
2. the first and third elements are checked and largest of these two elements is placed in arr[0] .
3. this process continues until the first and last elements are checked.

How do you find the second smallest number?

Find 2nd Smallest Number in Array using Arrays

1. import java.util.*;
2. public class SecondSmallestInArrayExample1{
3. public static int getSecondSmallest(int[] a, int total){
4. Arrays.sort(a);
5. return a[1];
6. }
7. public static void main(String args[]){
8. int a[]={1,2,5,6,3,2};

How to find the second largest element in an array?

To find the second largest element of the given array, first of all, sort the array. Sorting an array. If the first element is greater than the second swap them. Then, compare 2nd and 3rd elements if the second element is greater than the 3rd swap them.

How to get the N largest values of an array using NumPy?

Let’s see the program for how to get the n-largest values of an array using NumPy library. For getting n-largest values from a NumPy array we have to first sort the NumPy array using numpy.argsort () function of NumPy then applying slicing concept with negative indexing.

Do you declare largest2 as int or Min?

Although it can be done in one scan but to correct your own code , you must declare largest2 as int.Min as it prevents the largest2 holding the largest value intially.