Second largest element in binary search tree

Replace all occurrences of a pattern in a text by another string

Reverse a stack in place using recursion

Reverse the given Array without using built in function

Reverse a string in C using as little additional memory as possible

Print all sub sequences of a given array

Pain Fence

Number of elements less than or equal to a given number in a given subarray

Minimum Number of Deletions Of a String

Minimum Distance Between Two Elements in an Array