Library /Vijetnam

Vijetnam

21 problems here, rated 4.9 to 7.3 on our scale (AIME to National Olympiad, round 2). 21 of them ask for a proof. Years covered: 2006–2011.

Algebra 11Combinatorics 4Geometry 6

#	Topic	Diff	Type	Year
1	Algebra	4.9	proof	2011	open
2	Geometry	5.2	proof	2006	open
3	Algebra	5.6	proof	2006	open
4	Algebra	5.6	proof	2011	open
5	Algebra	5.8	proof	2006	open
6	Algebra	6.1	proof	2009	open
7	Algebra	6.1	proof	2007	open
8	Algebra	6.3	proof	2006	open
9	Combinatorics	6.3	proof	2006	open
10	Geometry	6.3	proof	2009	open
11	Algebra	6.4	proof	2011	open
12	Algebra	6.4	proof	2007	open
13	Geometry	6.6	proof	2011	open
14	Algebra	6.6	proof	2009	open
15	Algebra	6.6	proof	2009	open
16	Geometry	6.7	proof	2011	open
17	Combinatorics	6.8	proof	2007	open
18	Combinatorics	6.8	proof	2006	open
19	Geometry	6.9	proof	2007	open
20	Combinatorics	7.1	proof	2009	open
21	Geometry	7.3	proof	2011	open

These are sorted by difficulty within the competition, but they aren't a course. The track is the route through, drawn from all the sources at once.