Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % ▾ Users
ECOO '21 P4 - Chris' Candy ECOO 7p 23.6% 109
Mock CCO '18 Contest 4 Problem 3 - Counterattack Mock CCO 15p 23.6% 284
CCO '19 P2 - Sirtet CCO 20p 23.6% 85
Longest Increasing Subsequence Classics 10 23.6% 545
GlobeX Cup '18 J5 - Errands Uncategorized 10p 23.6% 177
Angie and Functions Uncategorized 20p 23.6% 15
WC '98 P6 - Return of the Plachta Woburn Challenge 5 23.6% 146
Max's Anger Contest Series 1 P3 - Divide and Connor Seasonal 7 23.6% 217
GFSSOC '14 Winter S4 - Stalactites GFSSOC 17p 23.6% 250
VM7WC '16 #6 Gold - Cold War Telecom VM7WC 10 23.6% 139
The Contest Contest 1 P1 - A Typical Codeforces Problem Uncategorized 5 23.6% 314
DMOPC '14 Contest 6 P5 - Planning DMOPC 15p 23.6% 36
Art Academy II: The Grand Escape Uncategorized 7p 23.5% 64
COCI '12 Contest 3 #2 Poredak COCI 5 23.5% 53
COCI '15 Contest 7 #1 Nizovi COCI 5 23.5% 63
COCI '18 Contest 3 #5 Praktični COCI 17p 23.5% 4
WC '99 P7 - The Rock Woburn Challenge 15 23.5% 27
COI '10 #5 Lovci COCI 35p 23.5% 1
Google Code Jam '22 Round 1C Problem A - Letter Blocks Google Code Jam 10p 23.5% 4
Google Code Jam '17 Round 1A Problem C - Play the Dragon Google Code Jam 25p 23.5% 1
IOI '04 P2 - Hermes IOI 15p 23.5% 188
Educational DP Contest AtCoder E - Knapsack 2 Uncategorized 7 23.5% 626
CCO '13 P4 - A Romantic Movie Outing CCO 20p 23.5% 91
WC '02 P10 - The Final Battle Woburn Challenge 10 23.5% 19
LKP '18 Contest 2 P2 - Secret Signal Uncategorized 5 23.5% 134
DMPG '16 S5 - Pizza Bag DMOPC 12p 23.5% 295
DMOPC '17 Contest 3 P5 - Picnic Planning DMOPC 15 23.5% 14
CEOI '17 P1 - One-Way Streets CEOI 25p 23.5% 51
CCC '15 S5 - Greedy For Pies CCC 17p 23.5% 555
CCC '17 J4 - Favourite Times CCC 5p 23.4% 1570
Wesley's Anger Contest 1 Problem 4 (Hard Version) - A Red-Black Tree Problem WAC 17 23.4% 13
Baltic OI '13 P1 - Ball Machine Baltic OI 15p 23.4% 14
DMOPC '21 Contest 2 P4 - Water Mechanics DMOPC 15p 23.4% 56
Baltic OI '14 P5 - Portals Baltic OI 15p 23.4% 16
WC '16 Contest 2 S2 - Away Mission Woburn Challenge 12p 23.4% 31
CCO '23 P1 - Binaria CCO 12p 23.4% 172
DMOPC '19 Contest 6 P4 - Grade 12 Math DMOPC 15p 23.4% 119
COCI '16 Contest 3 #1 Imena COCI 3p 23.4% 121
ICPC PACNW 2016 J - Shopping ICPC 15 23.4% 146
WOSS Dual Olympiad 2023 S3: Flying Uncategorized 15p 23.3% 16
CCO '13 P3 - LHC CCO 12p 23.3% 404
COCI '18 Contest 1 #2 Zamjena COCI 7p 23.3% 41
COCI '21 Contest 2 #3 Hiperkocka COCI 20p 23.3% 16
DWITE '12 R1 #4 - Trick or Tree'ing DWITE 5 23.3% 264
COCI '13 Contest 5 #5 Trokuti COCI 15p 23.3% 26
DWITE '07 R2 #4 - All Is Balanced DWITE 5 23.3% 253
An Animal Contest 3 P7 - Monkey Lasers (Up Version) AAC 25p 23.3% 9
CCO '14 P5 - Early Exam Evacuation CCO 20p 23.3% 87
WC '17 Finals J2 - Redundant Formations Woburn Challenge 7p 23.2% 44
APIO '17 P2 - Travelling Merchant APIO 20p 23.2% 46