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 largest and second largest number in an array C ++?

Iterate though all array elements, run a loop from 0 to size – 1 . Loop structure should look like for(i=0; imax2 = max1 and max1 = arr[i] .

How would you find the second largest element in an array using minimum No of comparisons?

In short, the Minimum Comparisons to find Second Largest Element or Second Smallest Element is N + logN – 2 comparisons . Hence, if there are 1024 elements, then we need at least 1024 + 10 – 2 = 1032 comparisons.

How do you find the second largest number?

Find 2nd Largest Number in Array using Collections

1. import java.util.*;
2. public class SecondLargestInArrayExample2{
3. public static int getSecondLargest(Integer[] a, int total){
4. List list=Arrays.asList(a);
5. Collections.sort(list);
6. int element=list.get(total-2);
7. return element;
8. }

How do you find the second largest number in a tree?

Related Articles. Inorder Tree Traversal without recursion and without stack!

How do you find the second largest number in an array Excel?

Strategy: Use the LARGE or SMALL functions. These functions take a range of values, then a k value. If you use a k value of 1, the LARGE function is exactly like a MAX: =LARGE(B2:B100,1). The real value in LARGE is the ability to ask for the second largest value using =LARGE(B2:B100,2).

How to find the second largest number in an array?

Enter the array element 1: 45.67 Enter the array element 1: 65.32 89.67 is the largest number 76.32 is the second largest number

How to find largest and second largest elements from float array?

Find largest and second largest elements from float Array. 1 #include . 2 #include . int main() {. int size,i; float arr[50];//variable declaration for size of array. float large=0.0, secondLarge=0.0;//declare and

How do you get the second largest element of an inputarray?

Let current element be inputArray [i]. Else if inputArray [i] is between max and secondMax (inputArray [i] > secondMax and inputArray [i] < max) then set secondMax = inputArray [i]; At the end of the loop, max and secondMax will hold the largest and second largest element of inputArray.

How to find the largest and second largest number in C++?

C++ program to find the largest and second largest numbers present in an array along with their location index on the array. This program first find the largest number by going through all the numbers in the array. It stores the index of largest number on the variable pos1and largest number is largestvariable.