HCI NOI Training 16 Be-a-problem-setter Contest

Attention! This is an unusual contest.

Hi DMOJ!

We are a group of students who are the alumni of Hwa Chong Institution (HCI), Singapore.

Recently, we ran a 8-session competitive programming course to prepare our juniors for the Singapore National Olympiad in Informatics (NOI) 2017.

This contest is part of the course and is held during the final session of the course. All problems in this contest are created by the trainers and participants of the course. Some problems in this contest are rather standard, and you may have seen problems that are similar or even identical to some problems in this contest before. Nevertheless, we hope that you enjoy the problems. Do note that there are around 30 problems that are to be completed in 6 hours (which can be quite challenging), so do team up with a friend to attempt the problems :)

As a result, this contest will be unrated.

Additionally, the only languages that will be allowed to be used in this contest are C and C++.

Good luck and have fun!


Problems

Problem Points AC Rate Users
HelloWorld_ex 100 48.8% 6
Cheese 5p 35.3% 10
Unexpected Factorial 5p 22.7% 21
Ulam Spiral 7p 72.7% 12
Stacker 15p 47.1% 7
Lamppost 5p 35.4% 17
Oversleep 10p 40.2% 25
Moana 15p 0.0% 1
BinaryBomb 10p 33.3% 3
Gifts 17p 57.1% 4
lvm_ex 15p 5.8% 3
Xorpow 12p 56.5% 9
Computation 5 4.3% 1
Danger Room 12p 2.5% 2
Jumping 17 6.6% 10
Penguin Food 15p 30.2% 10
Redstone Repeaters 10p 3.7% 2
Boxception 10p 44.4% 3
Serial Killer 15p 18.2% 12
Foodie 10 4.7% 6
Hearing 15p 60.0% 3
Pi Digits 100 0.0% 0
Poke Problem 7 52.9% 9
Cheapest Operation Ever 20p 23.9% 14
Sentence Checker 3p 15.3% 22
Taxi 10p 29.4% 13
Totient 12p 12.8% 6
Wizardry 7 15.3% 14

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