Problems # Status Problem Level Completes Likes 1 Linear Search vs Binary Search Beginner % 0 2 Longest substring with at most two unique characters Medium % 0 3 Java program to find the largest element in array Beginner % 0 4 Linear Search Algorithm Beginner % 0 5 Find the element which appears maximum number of times in the array. Medium % 0 6 Find duplicates in an given array in O(n) time and O(1) extra space. Medium % 0 7 Track the Maximum Element in a Stack. Medium % 0 8 Search an Element in a Rotated Sorted Array Medium % 0 9 Find a peak element in a Given Array Beginner % 0 10 Binary Search Beginner % 0 Linear Search vs Binary Search Longest substring with at most two unique characters Java program to find the largest element in array Linear Search Algorithm Find the element which appears maximum number of times in the array. Find duplicates in an given array in O(n) time and O(1) extra space. Track the Maximum Element in a Stack. Search an Element in a Rotated Sorted Array Find a peak element in a Given Array Binary Search 1