# Status Problem video Level Completes Likes 434 Print boundary of given matrix/2D array. Beginner % 1 433 Depth-First Search (DFS) in 2D Matrix/2D-Array - Iterative Solution Beginner % 0 432 Breadth-First Search (BFS) in 2D Matrix/2D-Array Beginner % 1 427 Number of Islands using BFS Medium % 0 422 Print Stack in reverse order Beginner % 0 421 Sort a given stack - Using Recursion Hard % 1 419 Print all subsets of an array with a sum equal to zero Medium % 0 413 ZigZag OR Diagonal traversal in 2d array/Matrix using queue Medium % 0 408 Number of Islands Medium % 1 406 Evaluation of Postfix Expressions (Polish Postfix notation) | Set 2 Medium % 0 399 Round Price Problem Hard % 0 397 Find Third Smallest elements in a given array Beginner % 0 392 Reverse a Stack using recursion - In Place (Without using extra memory) Hard % 1 388 Sort a given stack - Using Temporary Stack Medium % 0 384 Grouping of Anagrams Medium % 0 382 Linear Search vs Binary Search Beginner % 0 370 Find third largest element in a given array Beginner % 0 367 Sum of all Unique elements in a given array Beginner % 0 366 Java program to find the largest element in array Beginner % 0 364 Find three smallest elements in a given array Beginner % 0 Print boundary of given matrix/2D array. Depth-First Search (DFS) in 2D Matrix/2D-Array - Iterative Solution Breadth-First Search (BFS) in 2D Matrix/2D-Array Number of Islands using BFS Print Stack in reverse order Sort a given stack - Using Recursion Print all subsets of an array with a sum equal to zero ZigZag OR Diagonal traversal in 2d array/Matrix using queue Number of Islands Evaluation of Postfix Expressions (Polish Postfix notation) | Set 2 Round Price Problem Find Third Smallest elements in a given array Reverse a Stack using recursion - In Place (Without using extra memory) Sort a given stack - Using Temporary Stack Grouping of Anagrams Linear Search vs Binary Search Find third largest element in a given array Sum of all Unique elements in a given array Java program to find the largest element in array Find three smallest elements in a given array 1 2 3 4 5 6 7 8 9 10 11