Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % ▾ Users
CCO '10 P4 - Computer Purchase Return CCO 10 39.0% 363
COCI '10 Contest 4 #3 Astro COCI 7p 39.0% 20
COCI '21 Contest 5 #1 Kemija COCI 7p 39.0% 97
WC '18 Finals S1 - Behind the Scenes Woburn Challenge 7p 38.9% 46
DWITE '02 R2 #5 - Now I know my ABCs DWITE 5 38.9% 132
COCI '09 Contest 7 #4 Svemir COCI 12p 38.9% 114
NOI '17 P3 - Pool China NOI 30p 38.9% 3
COCI '23 Contest 5 #3 Piratski Kod COCI 15p 38.9% 12
TSOC '16 Contest 1 #4 - Alex and Animal Rights TSOC 7p 38.9% 419
MCIPC Contest 2 P2 - Icicles Uncategorized 3 38.8% 58
BlueBook - Find the Character BlueBook 3 38.8% 585
SAC '22 Code Challenge 5 Junior P3 - Media List SAC Coding Challenge 5p 38.8% 284
JSB '19 - P3 CTF 7 38.8% 15
WC '95 P3 - Smallest Latin Square Woburn Challenge 10 38.8% 46
DMOPC '19 Contest 2 P3 - Selection DMOPC 12 38.7% 163
COCI '16 Contest 6 #1 H-indeks COCI 5p 38.7% 54
COCI '08 Contest 4 #1 Mjehuric COCI 3 38.7% 472
HCI '16 - Cheese Uncategorized 5p 38.7% 22
LKP '18 Contest 1 P1 - World Trade Foundation Uncategorized 3p 38.7% 220
COCI '16 Contest 6 #3 Turnir COCI 7 38.7% 48
CCC '01 S3 - Strategic Bombing CCC 7 38.6% 1454
DMOJLand Series: Fake Judges Olympiads School 7p 38.6% 160
Educational DP Contest AtCoder D - Knapsack 1 Uncategorized 7 38.6% 1034
Binary Search Tree Test Data Structure Tests 15 38.6% 196
NOIP '15 P5 - Substring China NOI 12p 38.6% 11
DMPG '15 S1 - Collecting Dust DMOPC 5 38.5% 272
DWITE '08 R2 #1 - My shiny digital key DWITE 3 38.5% 61
Grid 3 Uncategorized 20 38.5% 16
SAC '22 Code Challenge 4 P3 - Obligatory Math Problem SAC Coding Challenge 5 38.5% 205
CCO '17 P1 - Vera and Trail Building CCO 7p 38.5% 412
CCC '15 J3 - Rövarspråket CCC 5p 38.5% 2260
DWITE '09 R5 #5 - Weak Passwords DWITE 5 38.5% 26
DWITE '10 R4 #4 - Mountain Hiking DWITE 7 38.5% 72
CTU Open Contest 2018 - Moving Furniture ICPC 20 38.5% 4
WC '01 P2 - The Island Of Dr. Strangelove Woburn Challenge 10 38.5% 8
Baltic OI '17 P5 - Plus Minus Baltic OI 15p 38.5% 27
TTC Uncategorized 3 38.5% 104
COCI '11 Contest 2 #6 Raspored COCI 15p 38.5% 5
QCC P6 - Freedom! Uncategorized 7p 38.4% 70
VM7WC '15 #1 Bronze - Goon VM7WC 3 38.4% 532
DMOPC '14 Contest 2 P2 - Cutting Logs DMOPC 5p 38.4% 546
ECOO '13 R2 P1 - Upsetris ECOO 5p 38.4% 32
NOIP '08 P1 - Silly Monkey China NOI 5p 38.4% 29
Cheerio Contest 1 J1 - Pronounceable Words Uncategorized 3 38.3% 198
Educational DP Contest AtCoder Z - Frog 3 Uncategorized 20 38.3% 158
Mock CCC '23 Contest 1 J2 - Healthy Schedule Mock CCC 3 38.3% 560
MWC '15 #7 P2: Thief in the Night MWC 5p 38.3% 187
ECOO '14 R1 P4 - Fischer Random Chess ECOO 5p 38.3% 35
COCI '11 Contest 3 #2 D'hondt COCI 5p 38.3% 12
COCI '17 Contest 1 #2 Tetris COCI 5 38.3% 27