Given a non-empty string s and a dictionary wordDict containing a list of non-empty words, determine if s can be segmented into a space-separated sequence of on...

Given an unsorted array of integers, find the length of the longest consecutive elements sequence.

A sequence of numbers is called a wiggle sequence if the differences between successive numbers strictly alternate between positive and negative. The first diff...

Nearly prime number is an integer positive number for which it is possible to find such primes P1 and P2 that given number is equal to P1*P2. There is given a s...

There is sequence 1, 12, 123, 1234, …, 12345678910, … . Given first N elements of that sequence. You must determine amount of numbers in it that are divisible b...

Find the nth digit of the infinite integer sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, …

The sequence of non-negative integers A1, A2, …, AN is given. You are to find some subsequence Ai1, Ai2, …, Aik (1 <= i1 < i2 < … < ik <= N) such, that Ai1 XOR ...

Find amount of numbers for given sequence of integer numbers such that after raising them to the M-th power they will be divided by K.

The set [1,2,3,…,n] contains a total of n! unique permutations.

The count-and-say sequence is the sequence of integers with the first five terms as following: