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Problem Category Points AC % Users ▴
NOI '00 P5 - Frogs Crossing the River China NOI 10p 29.7% 24
Good Code Uncategorized 15 12.3% 24
NOI '06 P1 - Network Charges China NOI 20p 25.8% 24
NOI '11 P3 - Ali's Typewriter China NOI 30p 29.9% 24
COCI '09 Contest 4 #6 Palacinke COCI 15 41.2% 24
WC '01 P1 - The Rock Woburn Challenge 7 77.2% 24
COCI '20 Contest 2 #3 Euklid COCI 17p 19.6% 24
COCI '10 Contest 2 #3 Igra COCI 7p 21.0% 24
COCI '16 Contest 2 #6 Burza COCI 30p 22.0% 24
COCI '13 Contest 3 #2 Okvir COCI 5p 61.4% 24
COCI '12 Contest 2 #3 Lanci COCI 7p 35.3% 24
DMOPC '20 Contest 6 P5 - Jennifer's Math Mystery DMOPC 17p 11.8% 24
COCI '11 Contest 6 #2 Prozori COCI 5 65.8% 24
DMOPC '20 Contest 4 P6 - Petty Children DMOPC 25p 20.8% 24
Monkey Bread Uncategorized 7 27.3% 24
NOI '15 P4 - Homeric Epics China NOI 25p 25.8% 24
Persuasion Uncategorized 12 29.7% 24
Fixing Shirts Uncategorized 15 18.4% 24
Expected Inversions Uncategorized 12p 33.1% 24
DMOPC '21 Contest 5 P5 - Permutations & Primes DMOPC 30p 10.9% 24
COCI '21 Contest 4 #5 Šarenlist COCI 17p 30.0% 24
COI '12 #4 Spijuni COCI 10p 30.4% 24
Yet Another Contest 4 P6 - No More Solitaire YAC 20p 6.7% 24
JOI '20 Open P3 - Power Plant JOI 15p 40.7% 24
NOI '16 P4 - Interval China NOI 20p 20.4% 24
Baltic OI '01 P6 - Teleports Baltic OI 10p 37.8% 24
ETSR '23 Onsite Round 1 Problem 2 - Origami Uncategorized 15p 21.0% 24
Amplitude Hackathon '23 Practice Problem 3 - Demo Day Demos Uncategorized 5p 31.2% 24
The Contest Contest 1 P5 - A Typical CCO Problem Uncategorized 20p 4.2% 24
Mock CCC '24 Contest 1 S3 - Optimal Split Point Mock CCC 10p 3.0% 24
TSOC '15 Contest 1 #2 - Special Store TSOC 7p 10.4% 25
DMPG '17 G1 - FatalWhale and Candies DMOPC 15p 13.1% 25
Mock CCO '17 Problem 6 - Dire Consequences Mock CCO 20 24.2% 25
COCI '08 Contest 2 #6 Cavli COCI 25p 14.1% 25
ECOO '14 R2 P2 - Black and Grey ECOO 5p 44.6% 25
COCI '08 Regional #4 Tablica COCI 15 34.9% 25
COCI '15 Contest 5 #2 Multigram COCI 5 39.8% 25
IOI '19 P3 - Rectangles IOI 30p 6.9% 25
CEOI '19 Practice P3 - Tower Defense CEOI 12p 13.9% 25
VPEX P3 - Coding Club Uncategorized 12p 4.7% 25
QCC P5 - Vaccine Delivery Uncategorized 12 16.2% 25
CCO '20 P3 - Mountains and Valleys CCO 35p 5.8% 25
NOI '07 P4 - Necklace Factory China NOI 20p 10.1% 25
NOI '10 P4 - Flight Control China NOI 20p 21.7% 25
NOI '07 P2 - Cash Exchange China NOI 30p 11.8% 25
MMM '14 B - Benergy Transfer Uncategorized 10 40.5% 25
COCI '10 Contest 1 #4 Ljutnja COCI 12p 7.9% 25
WC '15 Finals S4 - Server Hacking Woburn Challenge 20p 26.8% 25
WC '99 Suicidal P1 - World Woburn Challenge 17p 16.6% 25
WC '15 Contest 3 J3 - Red Sun Simulator Woburn Challenge 10p 9.6% 25