Tag: combinations

Teaching Kids Programming: Videos on Data Structures and Algorithms You are given two positive integers startPos and endPos. Initially, you are standing at position startPos on an infinite number …

Teaching Kids Programming: Videos on Data Structures and Algorithms Given a grid with n*m squares (m horizontal squares and n vertical squares), and suppose you are at the top-left …

Return the number of permutations of 1 to n so that prime numbers are at prime indices (1-indexed.) (Recall that an integer is prime if and only if it …

Given an index k, return the k-th row of the Pascal’s triangle. For example, given k = 3, Return . Could you optimize your algorithm to use only O(k) …

The full permutation of a list can be easily programmed using recursive algorithms. The number of the full permutation results is where is the number of elements to permutate. …