I invite you to take part in HackerRank HourRank 19 starting on April 2nd 2017. The contest duration is 1 hours. There will be three algorithmic problems of various difficulty.
The problems will have subtasks to make them interesting for everyone. I strongly recommend to read all the problems.
The contestants are ranked by score. If two contestants get the same score, the person who reached the score first is ranked higher.