1

Largest Element in an Array

2

Second Largest Element in an Array without sorting

3

Check if the array is sorted

4

Remove duplicates from Sorted array

5

Left Rotate an array by one place

6

Left rotate an array by D places

7

Move Zeros to end

8

Linear Search

9

Find the Union

10

Find missing number in an array

11

Maximum Consecutive Ones

12

Find the number that appears once, and other numbers twice.

13

Longest subarray with given sum K(positives)

14

Longest subarray with sum K (Positives + Negatives)

1

2Sum Problem

2

Sort an array of 0's 1's and 2's

3

Majority Element (>n/2 times)

4

Kadane's Algorithm, maximum subarray sum

5

Print subarray with maximum subarray sum (extended version of above problem)

6

Stock Buy and Sell

7

Rearrange the array in alternating positive and negative items

8

Next Permutation

9

Leaders in an Array problem

10

Longest Consecutive Sequence in an Array

11

Set Matrix Zeros

12

Rotate Matrix by 90 degrees

13

Print the matrix in spiral manner

14

Count subarrays with given sum

1

Pascal's Triangle

2

Majority Element (n/3 times)

3

3-Sum Problem

4

4-Sum Problem

5

Largest Subarray with 0 Sum

6

Count number of subarrays with given xor K

7

Merge Overlapping Subintervals

8

Merge two sorted arrays without extra space

9

Find the repeating and missing number

10

Count Inversions

11

Reverse Pairs

12

Maximum Product Subarray