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Random
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
Max's Anger Contest Series 2 P3 - Array Anger
Problem
Category
Points ▴
AC %
Users
UHCC1 P2 - String
Uncategorized
5
46.2%
106
The Contest Contest 1 P1 - A Typical Codeforces Problem
Uncategorized
5
23.6%
314
COCI '23 Contest 3 #1 Eurokod
COCI
5p
60.0%
39
COCI '23 Contest 4 #1 Bingo
COCI
5p
67.0%
65
CCC '24 S2 - Heavy-Light Composition
CCC
5p
54.8%
439
CCC '24 J3 - Bronze Count
CCC
5p
47.3%
476
CCC '24 J4 - Troublesome Keys
CCC
5p
22.0%
303
Guessing Game
Uncategorized
5p
37.8%
9
COCI '23 Contest 5 #1 Zlagalica
COCI
5p
53.2%
28
Capture The Flag
Uncategorized
5
29.7%
71
Troubling Triangles
Uncategorized
7
28.4%
433
ECOO '13 R1 P3 - Hexudoku
ECOO
7p
52.7%
88
Postfix Notation
Uncategorized
7
18.9%
685
CCC '14 S3 - The Geneva Confection
CCC
7p
26.4%
2809
Find Dates
Uncategorized
7
8.5%
57
Better Censor
Uncategorized
7
22.4%
114
Bubble Sort
Uncategorized
7
33.9%
789
CCC '06 J4 - It's tough being a teen!
CCC
7
41.5%
1242
CCC '11 J4 - Boring Business
CCC
7
27.8%
1508
CCC '08 S3 - Maze
CCC
7
29.3%
1563
CCC '07 J5 - Keep on Truckin'
CCC
7
19.7%
1071
CCC '08 J4 - From Prefix to Postfix
CCC
7
42.8%
888
CCC '13 S4 - Who is Taller?
CCC
7
16.8%
1233
CCC '10 J5 - Knight Hop
CCC
7
36.6%
2405
CCC '09 J4 - Signage
CCC
7
29.1%
685
Breaking the Friend Chain
Uncategorized
7
28.9%
185
XOR
Uncategorized
7
41.6%
350
DMOPC '14 Contest 1 P5 - Surprise Teleport
DMOPC
7p
20.5%
533
CCC '12 S3 - Absolutely Acidic
CCC
7
26.6%
1861
CCC '12 S5 - Mouse Journey
CCC
7
45.6%
1818
Python Infinite Loop
Uncategorized
7p
17.3%
1879
CCC '11 J5 - Unfriend
CCC
7
46.8%
1003
The Cosmic Era P4 - Freedom Appears!
Uncategorized
7
18.2%
143
The Cosmic Era P3 - Battle Positions
Uncategorized
7
30.5%
987
DMOPC '13 Contest 1 P4 - AFK
DMOPC
7p
26.0%
802
More German Nouns
Uncategorized
7
9.2%
54
DMOPC '14 Contest 2 P3 - Sawmill
DMOPC
7p
36.8%
602
DMOPC '13 Contest 3 P3 - Crossing Field
DMOPC
7p
21.8%
475
DMOPC '13 Contest 3 P2 - Phone Microwave
DMOPC
7p
27.2%
194
Longest Common Subsequence
Classics
7
40.5%
837
Single Source Shortest Path
Classics
7
41.6%
1139
Modular Multiplicative Inverse
Classics
7
25.7%
234
DMOPC '14 Contest 3 P3 - Not Enough Personnel!
DMOPC
7p
31.4%
387
COCI '14 Contest 3 #2 Dom
COCI
7p
29.0%
150
CCC '03 S3 - Floor Plan
CCC
7
27.8%
1953
CCC '07 S3 - Friends
CCC
7
37.5%
1703
CCC '07 S4 - Waterpark
CCC
7
30.9%
1502
COCI '14 Contest 4 #2 Pšenica
COCI
7p
16.4%
109
Is it a Tree?
Seasonal
7p
33.4%
737
COCI '14 Contest 5 #2 Zmija
COCI
7p
38.1%
46
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