Rated Contest 1

Welcome to the first-ever MCPT Rated Contest!

The problem setter is pingu.

Special thanks to Trent, marsflat, and JojoTheWarrior for testing and feedback on the problems.

Before writing the contest, please ensure you have read the following:

Duration: 2 hours
Number of problems: 5, full feedback with no clipped output (you will see the results of your submissions instantly).
It is highly recommended to read all the problem statements. Some problems offer partial marks in the form of subtasks, solve these for those extra points!!
Ties will be broken by the maximum submission time that increased score with no penalties.
Scoreboard will be hidden, until your window is over. Divulging the contents of the scoreboard to participants who have not finished their window is an offense, the punishments of which are listed on the registration page.

Before writing the contest, you may wish to check out the faq and tips pages. After joining the contest, proceed to the Problems tab to begin.

Some additional notes you may wish to read:

Remove all extra debugging code and/or input prompts from your code before submitting. The judge is very strict—most of the time, it requires your output to match exactly.
Do not pause program execution at the end. The judging process is automated.
You should use stdin / stdout to perform input / output, respectively.
It is guaranteed that all the problems will be solvable with C++ and Java.
Read carefully, and try to attempt all the problems.

Problems

Problem	Points	AC Rate	Users
Rated Contest 1 P1 - Rhombus or Wrong Bus?	3	68.0%	30
Rated Contest 1 P2 - Circular Motion	5	31.8%	23
Rated Contest 1 P3 - Trap-ezoid	7	66.7%	25
Rated Contest 1 P4 - Difference of Squares	10p	18.9%	17
Rated Contest 1 P5 - Starred	10p	33.3%	13