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Hot problems
CCC '16 S4 - Combining Riceballs
Appleby Contest '19 P5 - Matrix Operation
Cheerio Contest 1 S2 - School Expansion
WC '96 P6 - Bases Multiplication
CCCHK '15 J4 - Where to build my house?
DMOPC '23 Contest 1 P1 - Peak Grid
EGOI '23 P4 - Bikes vs Cars
Problem
Category
Points ▾
AC %
Users
SAC '22 Code Challenge 5 P2 - Querying Extensions
SAC Coding Challenge
5p
73.8%
310
COCI '21 Contest 2 #1 Kaučuk
COCI
5p
73.9%
91
Peculiar Paints
Uncategorized
5
29.3%
21
An Animal Contest 5 P2 - Permutations & Products
AAC
5p
15.5%
283
WOSS Dual Olympiad 2021 J3: Frisbee Golf
Seasonal
5p
27.1%
221
GFSS Christmas Challenge P3 - Candy Distribution
GFSSOC
5p
29.1%
79
COCI '21 Contest 3 #1 Lampice
COCI
5p
31.4%
71
SAC '22 Code Challenge 3 Junior P4 - Normal Conversions
SAC Coding Challenge
5p
28.2%
174
Mock CCC '22 2 S1 - Kaguya Wants to Let Ishigami Pass
Mock CCC
5p
25.5%
177
DMOPC '21 Contest 5 P1 - Permutations & Primes
DMOPC
5p
22.2%
401
Mock CCC '22 Contest 1 J4 - Snowball Fight
Mock CCC
5p
16.7%
239
Mock CCC '22 Contest 2 J3 - Figure Skating Fun
Mock CCC
5p
30.1%
470
COCI '21 Contest 4 #1 Autići
COCI
5p
28.5%
100
An Animal Contest 6 P1 - Workout Routine
AAC
5p
15.9%
307
Baltic OI '11 P2 - Ice Cream
Baltic OI
5p
35.7%
53
Cheerio Contest 2 P3 - Digits
Uncategorized
5p
20.4%
38
CCC '22 S1 - Good Fours and Good Fives
CCC
5p
39.4%
2130
CCC '22 S2 - Good Groups
CCC
5p
26.1%
1560
CCC '22 J3 - Harp Tuning
CCC
5p
33.2%
1497
SAC '22 Code Challenge 4 Junior P3 - Obligatory Triangle Problem
SAC Coding Challenge
5p
26.6%
171
Yet Another Contest 2 P1 - Betting
YAC
5p
22.6%
259
DMOPC '21 Contest 7 P1 - Chika Grids
DMOPC
5p
26.6%
285
BPC 1 J3 - Group Project
Uncategorized
5
43.7%
219
BPC 1 S1 - Homework Questions
Uncategorized
5
17.1%
157
Cheerio Contest 1 S1/J4 - Going to School
Uncategorized
5p
45.2%
142
Another Random Contest 1 P1 - Chessgame
Uncategorized
5p
29.3%
75
COCI '21 Contest 6 #1 Med
COCI
5p
40.1%
58
Cheerio Contest 1 J3 - Festival
Uncategorized
5
45.5%
188
Yet Another Contest 3 P1 - Shell Swap Scam
YAC
5p
24.1%
174
SAC '22 Code Challenge 5 Junior P3 - Media List
SAC Coding Challenge
5p
38.8%
286
Yet Another Contest 4 P1 - Snap
YAC
5p
47.2%
263
Stacking Boxes
Uncategorized
5
34.9%
81
Age Demographic
Uncategorized
5
18.9%
112
NOIP '99 Junior P1 - Cantor Table
China NOI
5p
42.9%
15
A Math Contest P2 - Subsequence Sum
Uncategorized
5
29.2%
343
A Math Contest P1 - Arrays
Uncategorized
5
32.1%
249
Fair Competition
Olympiads School
5
32.7%
121
DMOPC '21 Contest 10 P1 - Japaneasy
DMOPC
5
36.4%
238
Yet Another Contest 6 P1 - No More Separation
YAC
5p
32.7%
312
DMOPC '22 Contest 1 P1 - Up-down Sequence
DMOPC
5p
24.9%
263
MCIPC Contest 1 P1 - Cypher
Uncategorized
5p
37.2%
49
BSSPC '22 P4 - Exec Pieing
Uncategorized
5p
15.5%
221
Waterloo 2022 Fall D - Course Selection
Waterloo Local
5
63.5%
51
Max's Anger Contest Series 1 P2 - Wesley's Anger Contest 7 P1 - Enraged
Seasonal
5
51.2%
223
BSSPC '22 P3 - Searching for Seats
Uncategorized
5
40.3%
283
MCIPC Contest 2 P3 - Snowy Streets
Uncategorized
5p
28.6%
46
Yet Another Contest 8 P1 - Permutation Sorting
YAC
5p
31.2%
338
DMOPC '22 Contest 2 P1 - DMOPC Crisis
DMOPC
5p
15.5%
313
COCI '22 Contest 1 #1 Desni Klik
COCI
5p
68.9%
141
COCI '22 Contest 2 #1 Tramvaji
COCI
5p
47.7%
84
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