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Random
Hot problems
CCC '19 S2 - Pretty Average Primes
Lil' Jami
Knapsack 4
UACC 1 P3 - Cheeky Checkers
IOI '06 P2 - Pyramid
COCI '10 Contest 2 #2 Napor
CCC '24 J5 - Harvest Waterloo
Problem
Category
Points
AC %
Users ▴
Another Contest 7 Problem 4 - Team Assignments
ACC
12p
20.0%
31
Wesley's Anger Contest 6 Problem 6 (Easy Version) - Santa's Candy Factory
WAC
20p
9.1%
31
DMOPC '20 Contest 4 P5 - Cyclic Cypher
DMOPC
17p
10.0%
31
Segment Tree Practice 2
Uncategorized
12
41.0%
31
COCI '16 Contest 2 #4 Prosječni
COCI
10p
42.2%
31
COCI '10 Contest 5 #4 Honi
COCI
10p
33.9%
31
SAC '22 Code Challenge 1 P5 - That Wall
SAC Coding Challenge
12
26.9%
31
Mock CCC '22 1 S4 - Berkeley Math Tournament Statistics
Mock CCC
20p
8.7%
31
Baltic OI '15 P3 - Network
Baltic OI
15p
26.0%
31
COCI '21 Contest 5 #4 Radio
COCI
17p
13.9%
31
COCI '23 Contest 2 #5 Zatopljenje
COCI
15p
39.6%
31
CCO Preparation Test 2 P1 - Concatenation
Mock CCO
17p
13.1%
32
COCI '14 Contest 7 #6 Police
COCI
30p
12.9%
32
DMOPC '15 Contest 7 P4 - Magic
DMOPC
10p
10.3%
32
New Year's '17 P4 - Christmas Cozonac
Seasonal
12p
16.8%
32
TC
Uncategorized
15p
10.8%
32
ECOO '13 R2 P1 - Upsetris
ECOO
5p
38.4%
32
DWITE '07 R4 #1 - Curve-shot
DWITE
5
56.1%
32
DWITE '08 R2 #5 - Water damage
DWITE
7
22.4%
32
DWITE '12 R5 #1 - Travel Time
DWITE
5
43.8%
32
New Year's '18 P7 - Tree of Life
Seasonal
20p
13.5%
32
Dynamic Tree Test
Data Structure Tests
45
30.0%
32
Double Doors Regional P6 - Tudor Learns More DDR
Uncategorized
17
17.7%
32
DMOPC '18 Contest 1 P5 - Sorting
DMOPC
12p
24.7%
32
Back To School '18: Function Maximization
Seasonal
25p
13.6%
32
Back To School '19: Unstable Books
Seasonal
15p
29.9%
32
APIO '08 P3 - DNA
APIO
15p
30.8%
32
IOI '19 P5 - Vision Program
IOI
20p
8.0%
32
Back From Summer '19 P5: ABC123E
Seasonal
17p
30.1%
32
DMOPC '19 Contest 1 P5 - Broken String
DMOPC
17
9.0%
32
COCI '19 Contest 6 #1 Datum
COCI
5p
36.4%
32
ACM U of T Tryouts C2 E - MVP
ICPC
15
27.2%
32
IOI '03 P2 - Comparing Code
IOI
25p
17.6%
32
COCI '09 Contest 5 #3 Kletva
COCI
7
21.5%
32
WC '18 Contest 4 J3 - Inventory
Woburn Challenge
5p
27.2%
32
WC '16 Contest 4 S3 - Night Howlers
Woburn Challenge
15p
20.6%
32
WC '18 Contest 4 S3 - Dance Royale
Woburn Challenge
15p
19.2%
32
WC '07 P5 - BitStrings
Woburn Challenge
10p
26.1%
32
DMOPC '20 Contest 1 P6 - Victor Identifies Software
DMOPC
25p
16.1%
32
Advanced Battleships
Uncategorized
15p
11.1%
32
Word Wrap Cypher
Uncategorized
7
35.8%
32
CCC '02 S4 - Bridge Crossing (Hard)
CCC
20
8.6%
32
James' XOR Update
Uncategorized
12p
27.9%
32
COCI '12 Contest 1 #4 Ljubomora
COCI
7p
41.7%
32
COCI '11 Contest 6 #3 Zagrade
COCI
7
28.5%
32
COCI '12 Contest 6 #2 Sume
COCI
7
60.3%
32
COCI '17 Contest 6 #2 Alkemija
COCI
10p
8.3%
32
DMOPC '20 Contest 5 P5 - Slacking Off Again
DMOPC
20p
17.6%
32
Subarray Search
Uncategorized
7
26.4%
32
K-th Minimum Number
Uncategorized
17
45.5%
32
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