# Status Problem video Level Completes Likes 243 Find two non-repeating numbers in an array in O(n) time and O(1) space Hard % 1 241 Separate even and odd integers in a given array Beginner % 0 240 All elements appears thrice and one element appears once. Find that element in O(n) time and O(1) space Hard % 1 239 Find local minimum or local maximum in O(1) Medium % 0 238 Separate 0’s and 1’s in a given array Beginner % 0 237 Find three elements in an array that sum to a zero Beginner % 0 236 Find three elements in an array that sum to a given value Beginner % 1 235 Majority Element- Boyer–Moore majority vote algorithm Medium % 0 234 Majority Element – Part 1 Beginner % 0 233 Find the local minima in a given array Medium % 0 231 Check if array is sorted using recursion Beginner % 0 230 Find the Index from which 0 starts Beginner % 0 229 Find the increasing OR decreasing point in an array Beginner % 0 228 Find the only element in array which appears only once Beginner % 1 223 Stock Single Sell Problem - Dynamic Programming - O(n) Medium % 2 222 Maximum Subarray OR Largest Sum Contiguous Subarray Problem – Divide and Conquer Hard % 0 221 Identifying Maximum Gain from Sequential Elements Medium % 0 219 Find the two repeating elements in a given array | 6 Approaches Medium % 1 217 Find two elements whose sum is closest to zero Medium % 1 216 Find the element which appears maximum number of times in the array Medium % 0 215 Find duplicates in an given array in O(n) time and O(1) space Medium % 0 214 Find the last non repeating character in a given string. Beginner % 0 213 Find the last repeating character in a given string Beginner % 0 212 Find the first non repeating character in a given string Beginner % 0 211 Find the first repeating character in a given string Beginner % 0 209 Find longest Snake sequence in a given matrix Medium % 1 208 Dynamic Programming - Count all paths in 2D Matrix with Obstructions in it Medium % 1 207 Dynamic Programming - Count all paths from top left to bottom right of a mXn matrix Medium % 1 206 Reverse the given Array without using built in function Beginner % 0 205 Print All Diagonals of a given matrix Medium % 1 204 Dynamic Programming - Edit Distance Problem Hard % 2 203 Dynamic Programming - Coin In a Line Game Problem Hard % 0 200 Dynamic Programming - Highway Billboard Problem Hard % 0 199 Dynamic Programming - Maximum Subarray Problem Medium % 0 198 Kadane's Algorithm - Maximum Subarray Problem Medium % 1 Find two non-repeating numbers in an array in O(n) time and O(1) space Separate even and odd integers in a given array All elements appears thrice and one element appears once. Find that element in O(n) time and O(1) space Find local minimum or local maximum in O(1) Separate 0’s and 1’s in a given array Find three elements in an array that sum to a zero Find three elements in an array that sum to a given value Majority Element- Boyer–Moore majority vote algorithm Majority Element – Part 1 Find the local minima in a given array Check if array is sorted using recursion Find the Index from which 0 starts Find the increasing OR decreasing point in an array Find the only element in array which appears only once Stock Single Sell Problem - Dynamic Programming - O(n) Maximum Subarray OR Largest Sum Contiguous Subarray Problem – Divide and Conquer Identifying Maximum Gain from Sequential Elements Find the two repeating elements in a given array | 6 Approaches Find two elements whose sum is closest to zero 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) space Find the last non repeating character in a given string. Find the last repeating character in a given string Find the first non repeating character in a given string Find the first repeating character in a given string Find longest Snake sequence in a given matrix Dynamic Programming - Count all paths in 2D Matrix with Obstructions in it Dynamic Programming - Count all paths from top left to bottom right of a mXn matrix Reverse the given Array without using built in function Print All Diagonals of a given matrix Dynamic Programming - Edit Distance Problem Dynamic Programming - Coin In a Line Game Problem Dynamic Programming - Highway Billboard Problem Dynamic Programming - Maximum Subarray Problem Kadane's Algorithm - Maximum Subarray Problem 1 2 3 4 5 6
