POJ Tools
We use the Peking University Online Judge for training.
We try to build a classification to ease our problem selection.

We rank difficulty by: (1) trivial, (2) easy, (3) normal, (4) difficult, or (5) insane.

We rank whether it is interesting by: (1) bad, (2) poor, (3) standard, (4) nice, or (5) excellent.

Some common classifications include (1) ad hoc, (2) greedy, (3) recursive,
(4) dynamic programming, (5) math, (6) simulation, and (7) graph.
Feel free to add your own opinion on any problem.
We encourage you to set your school name to HKU, so that we can
see our progress together.
ID 
Title 
Classification 
1000 
A+B Problem 
trivial, nice (because easy to accept XD), ad hoc  Ho Leung

1003 
Hangover 
trivial, standard, ad hoc  Ho Leung

1004 
Financial Management 
trivial, standard, ad hoc  Ho Leung

1005 
I Think I Need a Houseboat 
trivial, standard, ad hoc  Ho Leung

1007 
DNA Sorting 
trivial, standard, ad hoc  Ho Leung

1012 
Joseph 
normal, nice, ad hoc, simulation  Ho Leung

1014 
Dividing 
normal, nice, dynamic programming  Ho Leung

1163 
The Triangle 
easy, standard, dynamic programming  Ho Leung

1207 
The 3n + 1 problem 
easy, standard, simulation  Ho Leung

1316 
Self Numbers 
easy, standard, dynamic programming  Ho Leung

1338 
Ugly Numbers 
easy, standard, STL, math  Ho Leung

2000 
Gold Coins 
trivial, standard, ad hoc, math  Ho Leung

2231 
Moo Volume 
easy, standard, ad hoc, math, big integer  Ho Leung

2247 
Humble Numbers 
easy, poor (need to know how English counts number), STL, math  Ho Leung

2367 
Genealogical tree 
easy, standard, graph, topological sort  Ho Leung

2386 
Lake Counting 
easy, standard, recursive, flood fill  Ho Leung

2390 
Bank Interest 
trivial, standard, ad hoc, math  Ho Leung

2719 
Faulty Odometer 
easy, nice, ad hoc, math  Ho Leung

3032 
Card Trick 
trivial, standard, ad hoc  Ho Leung

3273 
Monthly Expense 
easy, standard, ad hoc, greedy  Ho Leung

3601 
Tower of Hanoi 
insane, nice, recursive, hanoi, math  Ho Leung

3671 
Dining Cows 
easy, standard, ad hoc  Ho Leung

