Find the largest rectangle in a matrix

easy Is Prime easy Prime Till N easy Reverse Integer easy GCD easy Fibonacci easy Fib Till N easy Exit Point of a matrix easy Placing N Queen in a matrix easy Arranging Vowels And Consonants easy Addition Of Two Linked List easy Circular Linked List easy Sort The Absolute List easy Decimal Number From Binary Linked List easy Count Pairs Having Sum X easy Delete alternate nodes of linked list easy Sum Of Last K Nodes In A Linked List