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Hot problems
CCC '19 S2 - Pretty Average Primes
IOI '94 P1 - The Triangle
CCC '24 S2 - Heavy-Light Composition
UHCC1 P2 - String
DMOPC '20 Contest 4 P1 - Missing Numbers
SAC '22 Code Challenge 4 Junior P4 - Obligatory Permutation Problem
Problem
Category ▾
Points
AC %
Users
SAC '22 Code Challenge 3 Junior P4 - Normal Conversions
SAC Coding Challenge
5p
28.2%
174
SAC '22 Code Challenge 3 Junior P5 - Normal Encoding
SAC Coding Challenge
10p
17.8%
33
SAC '22 Code Challenge 4 Junior P1 - Obligatory DeMello Problem
SAC Coding Challenge
3
62.9%
255
SAC '22 Code Challenge 4 Junior P2 - Obligatory Geometry Problem
SAC Coding Challenge
3p
51.6%
209
SAC '22 Code Challenge 4 Junior P3 - Obligatory Triangle Problem
SAC Coding Challenge
5p
26.6%
171
SAC '22 Code Challenge 4 Junior P4 - Obligatory Permutation Problem
SAC Coding Challenge
7p
18.8%
93
SAC '22 Code Challenge 4 Junior P5 - Obligatory Output Only Problem
SAC Coding Challenge
10
24.9%
38
SAC '22 Code Challenge 5 Junior P1 - Monkey, Type!
SAC Coding Challenge
3
68.3%
252
SAC '22 Code Challenge 5 Junior P5 - English Summative
SAC Coding Challenge
10p
26.5%
79
SAC '22 Code Challenge 5 Junior P2 - Badminton Scoring
SAC Coding Challenge
3
72.8%
289
SAC '22 Code Challenge 5 Junior P4 - Course Requirements
SAC Coding Challenge
7p
52.8%
239
SAC '22 Code Challenge 5 Junior P3 - Media List
SAC Coding Challenge
5p
38.7%
285
Longest Up-Down Subsequence
POI
12p
29.6%
126
XIV POI Stage I - Queries
POI
15p
0.5%
1
Matchings
POI
30p
15.6%
3
Mynerva
Olympiads School
7p
18.4%
79
OCC '19 B6 - Fiji water
Olympiads School
10p
16.6%
19
OCC '19 B2 - Cinematic
Olympiads School
5
16.2%
75
OCC '19 B1 - Darcy_Liu
Olympiads School
3
15.2%
159
OCC '19 B5 - Gold
Olympiads School
7
12.0%
20
OCC '19 B4 - Bussing
Olympiads School
5
22.1%
15
OCC '19 B3 - Difference
Olympiads School
5
22.5%
81
OCC '19 S3 - NAN Language
Olympiads School
7p
14.4%
31
OCC '19 S6 - City Tolls
Olympiads School
17p
26.1%
4
OCC '19 G4 - Willson and Fighting
Olympiads School
30p
3.5%
3
OCC '19 G3 - Binary Game
Olympiads School
25p
14.3%
5
OCC '19 G1 - Top Coder
Olympiads School
10p
34.1%
43
OCC '19 G5 - King kobortor's Infrastructure
Olympiads School
17p
24.7%
23
OCC '19 S5 - Partitioning
Olympiads School
12p
8.2%
12
OCC '19 G2 - A Guessing Game
Olympiads School
25p
7.3%
6
OCC '19 G6 - Monkeys in a Tree
Olympiads School
30p
10.0%
9
DMOJLand Series: Fake Judges
Olympiads School
7p
38.6%
160
A Fenwick Tree Question
Olympiads School
15
30.0%
46
Palindrome Path
Olympiads School
20p
12.8%
9
A Sum Problem
Olympiads School
12p
13.0%
76
Athena on Zanzibar Island
Olympiads School
12p
6.7%
31
Magic Sequence
Olympiads School
7p
64.9%
92
Maximum Deviation Spanning Tree
Olympiads School
25p
4.0%
4
Least Multiple
Olympiads School
10p
7.9%
29
Fair Competition
Olympiads School
5
32.7%
121
Lemon Game
Olympiads School
7
28.6%
43
Permutation Sorting
Olympiads School
20p
16.2%
13
Tree Journey
Olympiads School
12p
50.0%
27
Infinity Card Decks
Olympiads School
15p
16.9%
12
City Travel
Olympiads School
15p
16.8%
21
MWC '15 #1 P5: Love Guru
MWC
7p
25.6%
369
MWC '15 #1 P1: Playlist Panic
MWC
5
29.6%
312
MWC '15 #1 P4: Genetic Probability
MWC
5p
29.2%
30
MWC '15 #1 P3: Dolls
MWC
3
25.1%
184
MWC '15 #1 P2: Postcard
MWC
3p
30.9%
142
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