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Asia-Pacific Informatics Olympiad
Atcoder
Bedao Contest
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Duyên Hải Bắc Bộ
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Educational Codeforces
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International Olympiad in Informatics
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Problem types
2 con trỏ
2-satisfiability
Ad hoc (không thuộc thể loại nào)
Aho Corasick
Balanced BST (cây nhị phân cân bằng)
Bao lồi
Bitwise
C++ STL (Heap, Set, Map, ..)
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Cặp ghép có trọng số
Cặp ghép trên đồ thị thường
Cây khung nhỏ nhất
Chia đôi tập
Chu trình Euler
Chưa phân loại
DFS / BFS
Disjoint set (DSU)
Divide & Conquer (Chia để trị)
Duyệt
Fast Fourier Transform (FFT)
Fenwick Tree (Binary Indexed Tree)
Fenwick Tree 2D
Hashing
Heavy Light Decomposition
Hình học
Interactive
Khử Gauss
KMP
Knuth Optimization
LCA
Luồng
Luồng mincost
Lý thuyết trò chơi - Adhoc
Lý thuyết trò chơi - Grundy
Lý thuyết trò chơi - Nim
Manacher
Mảng cộng dồn
Monotonic Queue
Nhân ma trận
Output Only
Quy hoạch động
Quy hoạch động bao lồi
Quy hoạch động bitmask
Quy hoạch động chữ số
Quy hoạch động thứ tự từ điển
Quy hoạch động trên cây
Rời rạc hóa
Segment Tree (Interval Tree)
Số học
String (xâu nói chung)
Suffix Array / Suffix Automaton / Suffix Tree
Sweep line
Tham lam
Tìm kiếm nhị phân (Binary search)
Tổ hợp
Toán - adhoc
Trie
Xử lý số lớn
Z-function
Đồ thị
Đường đi ngắn nhất - Dijkstra
Đường đi ngắn nhất - Floyd
Point range
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Random
Hot problems
Free Contest 10 - CHARM
Free Contest 59 - DICE
Free Contest 98 - REWARD
Free Contest Testing Round 42 - KEYLOGGER
A cộng B
ID
Problem
Category
Points
% AC
# AC
▴
bedao_r01_zstring
Bedao Regular Contest 01 - ZSTRING
Bedao Contest
0.30
10.0%
46
atcoder_dp_v
Atcoder Educational DP Contest V - Subtree
Atcoder
0.60
49.6%
114
bedao_r01_gcdmax
Bedao Regular Contest 01 - GCDMAX
Bedao Contest
0.20
14.6%
245
bedao_r01_exp
Bedao Regular Contest 01 - EXP
Bedao Contest
0.10
4.8%
127
bedao_r01_grade
Bedao Regular Contest 01 - GRADE
Bedao Contest
0.40
43.5%
229
bedao_r01_hgraph
Bedao Regular Contest 01 - HGRAPH
Bedao Contest
0.50
23.2%
93
bedao_r02_leaves
Bedao Regular Contest 02 - LEAVES
Bedao Contest
0.15
22.9%
161
bedao_r01_hogwarts
Bedao Regular Contest 01 - HOGWARTS
Bedao Contest
0.60
27.1%
56
bedao_r02_8rooks
Bedao Regular Contest 02 - 8ROOKS
Bedao Contest
0.50
14.2%
31
bedao_r02_sister
Bedao Regular Contest 02 - SISTER
Bedao Contest
0.20
37.0%
321
errichto_matexp_cntpath2
Matrix Exponentiation - Count paths queries
Educational
1.30
28.4%
80
bedao_r02_pxor
Bedao Regular Contest 02 - PXOR
Bedao Contest
0.60
17.4%
53
bedao_r02_geometry2
Bedao Regular Contest 02 - GEOMETRY2
Bedao Contest
0.30
29.1%
69
bedao_r02_tourist
Bedao Regular Contest 02 - TOURIST
Bedao Contest
0.80
14.8%
65
errichto_matexp_fibonacci
Matrix Exponentiation - Fibonacci
Educational
0.40
27.6%
457
errichto_matexp_hstringupd
Matrix Exponentiation - String Mood Updates
Educational
1.20
47.8%
72
errichto_matexp_knightpaths
Matrix Exponentiation - Knight Paths
Educational
0.80
42.2%
112
secondthread_tree_circumference
Circumference of a Tree
Educational
0.30
54.7%
169
secondthread_tree_diameter
Dynamic Diameter
Educational
0.50
37.9%
112
errichto_matexp_randmood
Matrix Exponentiation - Random Mood
Educational
0.30
62.4%
199
secondthread_tree_sloth
Sloth Naptime
Educational
0.50
38.1%
80
secondthread_tree_flow
Cycle Free Flow
Educational
0.50
45.3%
61
secondthread_tree_lorax
The Lorax
Educational
0.70
60.0%
43
secondthread_tree_richtree
Filthy Rich Trees
Educational
0.70
33.1%
43
errichto_matexp_minpath
Matrix Exponentiation - Min Path
Educational
0.80
39.5%
99
errichto_matexp_stringmood
Matrix Exponentiation - String Mood
Educational
0.50
64.2%
232
errichto_matexp_linearrecsequenc
Matrix Exponentiation - Recurrence With Square
Educational
0.70
46.7%
60
errichto_matexp_cntpath
Matrix Exponentiation - Count path
Educational
0.40
60.8%
222
bedao_m07_rate
Bedao Mini Contest 07 - RATE
Bedao Contest
0.14
30.8%
213
bedao_m07_puzzle
Bedao Mini Contest 07 - PUZZLE
Bedao Contest
0.80
10.6%
19
bedao_m07_market
Bedao Mini Contest 07 - MARKET
Bedao Contest
0.30
12.3%
115
bedao_m07_architect
Bedao Mini Contest 07 - ARCHITECT
Bedao Contest
0.50
11.2%
22
bedao_m07_loga
Bedao Mini Contest 07 - LOGA
Bedao Contest
0.20
25.1%
159
cf_edu2e
Codeforces Educational 2E - Lomsat gelral
Educational Codeforces
0.60
40.6%
105
cf_edu3d
Codeforces Educational 3D - Gadgets for dollars and pounds
Educational Codeforces
0.40
34.5%
50
cf_edu2c
Codeforces Educational 2C - Make Palindrome
Educational Codeforces
0.20
46.4%
122
cf_edu2f
Codeforces Educational 2F - Edge coloring of bipartite graph
Educational Codeforces
1.00
38.6%
21
icpc21_beta_a
ICPC Practice Contest 2021 - A Classic Problem
ICPC
1.80
6.9%
31
cf_edu1d
Codeforces Educational 1D - Igor In The Museum
Educational Codeforces
0.30
29.7%
187
cf_edu2d
Codeforces Educational 2D - Area of Two Circles' Intersection
Educational Codeforces
0.40
31.4%
42
cf_edu3e
Codeforces Educational 3E- Minimum spanning tree for each edge
Educational Codeforces
0.60
43.5%
95
cf_edu3c
Codeforces Educational 3C - Load Balacing
Educational Codeforces
0.30
32.6%
68
cf_edu1c
Codeforces Educational 1C - Nearest Vectors
Educational Codeforces
0.70
29.4%
94
cf_edu3f
Codeforces Educational 3F - Frogs and mosquitoes
Educational Codeforces
0.70
32.4%
29
bedao_r03_wordgame
Bedao Regular Contest 03 - WORDGAME
Bedao Contest
0.15
22.1%
293
bedao_r03_3numbers
Bedao Regular Contest 03 - 3 NUMBERS
Bedao Contest
0.20
19.9%
103
bedao_r03_protect
Bedao Regular Contest 03 - PROTECT
Bedao Contest
0.80
24.5%
37
bedao_r03_prime
Bedao Regular Contest 03 - PRIME
Bedao Contest
0.40
29.6%
229
bedao_r03_race
Bedao Regular Contest 03 - RACE
Bedao Contest
0.60
28.5%
33
bedao_r03_kindness
Bedao Regular Contest 03 - KINDNESS
Bedao Contest
0.10
13.3%
174
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