Count the number of sub-arrays with at least k pairs of indices (i, j) such that i < j and arr[i] == arr[j] in a given array.Mar 5, 2023·10 min read
What is Recursion ?Recursion is basically a technique of problem-solving in which a function calls itself again and again till a particular base case. The function calls itself with the help of parameters and at each call, the value of the parameter decreases or increa...Mar 5, 2023·4 min read