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Random
Hot problems
COCI '08 Contest 3 #2 Kemija
CCC '24 S2 - Heavy-Light Composition
CCCHK '15 J4 - Where to build my house?
Yet Another Contest 8 P2 - No More Modern Art
2spooky4me
Problem
Category
Points
AC %
Users ▾
A Math Contest P9 - Buy Some Get Some
Uncategorized
12
27.1%
55
NOIP '07 P1 - Counting Numbers
China NOI
3p
48.1%
55
UHCC1 P3 - Busy Elevator
Uncategorized
5
10.3%
55
Mock ECOO '14 P1 - Do You Want to Build a Snowman?
ECOO
12
8.5%
54
Halloween '14 P4 - Fox Girls
Seasonal
20p
7.0%
54
More German Nouns
Uncategorized
7
9.2%
54
COCI '14 Contest 2 #6 Norma
COCI
25p
16.7%
54
STNBD P6 - Terminus Est
Uncategorized
35p
11.9%
54
MWC '15 #4 P1: Love Guru 2
MWC
3
31.7%
54
MWC '15 #4 P2: Data Formatting
MWC
5
51.7%
54
Back To School '16: Times Table
Seasonal
17p
9.6%
54
IOI '16 P4 - Paint by Numbers
IOI
15p
12.4%
54
COCI '08 Contest 5 #4 Lubenica
COCI
12p
19.7%
54
DWITE '08 R1 #1 - LaNDscAPE ii
DWITE
3
64.1%
54
DWITE '08 R4 #3 - Secret party
DWITE
7
37.9%
54
TLE '17 Contest 5 P3 - Willson and Factorization
TLE
7p
36.8%
54
Another Contest 3 Problem 4 - Range Updates and Range Queries
ACC
15
14.2%
54
Mock CCC '19 Contest 1 S3 - Pusheen Eats Tuna Sashimi and Tuna Nigiri
Mock CCC
12p
5.2%
54
COCI '18 Contest 1 #4 Strah
COCI
15p
58.3%
54
DMOPC '20 Contest 7 P4 - Mimi and Carrots II
DMOPC
17p
24.1%
54
CCO '97 P2 - Alien Invasion
CCO
10
43.4%
54
VPEX P5 - Points Redistribution
Uncategorized
20p
24.4%
54
CCO '00 P5 - Millikan's Oil Droplet Experiment
CCO
7
22.3%
54
COCI '19 Contest 1 #1 Trol
COCI
5p
21.9%
54
COCI '19 Contest 4 #4 Klasika
COCI
17p
12.9%
54
IOI '95 Practice Task 2 - Word Chains
IOI
12
43.9%
54
WC '95 P1 - Coded Message
Woburn Challenge
7
8.9%
54
WC '18 Finals J2 - Script Doctor
Woburn Challenge
5p
29.1%
54
IOI '20 P2 - Connecting Supertrees
IOI
15p
13.8%
54
Segment Tree Practice 1
Uncategorized
12
33.5%
54
COCI '16 Contest 6 #1 H-indeks
COCI
5p
38.7%
54
COCI '11 Contest 5 #1 Križaljka
COCI
3p
46.7%
54
Multiplication Madness
Uncategorized
7p
30.8%
54
CCO '21 P4 - Travelling Merchant
CCO
25p
19.0%
54
SGS Programming Challenge P2 - Vending Machine in Lunch
Uncategorized
10p
12.2%
54
DMOPC '22 Contest 5 P6 - Threes and Twos
DMOPC
20p
20.0%
54
CCO '23 P4 - Flip it and Stick it
CCO
17p
6.8%
54
DMOPC '23 Contest 1 P4 - Wandering Walk
DMOPC
17p
6.4%
54
COCI '14 Contest 5 #5 Jabuke
COCI
15p
22.6%
53
MWC '15 #2 P5: Watchmeblink1
MWC
7
36.1%
53
TLE '16 Contest 8 P3 - Fool's Sequence
TLE
12p
20.5%
53
LKP '18 Contest 1 P6 - The Great Fire of Köres
Uncategorized
20p
16.6%
53
DMOPC '18 Contest 4 P5 - Dr. Henri and Wormholes
DMOPC
25p
18.5%
53
Another Contest 4 Problem 8 - DMOJ!
ACC
0
27.3%
53
Another Contest 4 Problem 11 - Three Rectangles
ACC
0
36.1%
53
GlobeX Cup '19 J3 - Codex
Uncategorized
5p
16.4%
53
COCI '19 Contest 3 #2 Grudanje
COCI
7p
50.0%
53
IOI '96 P2 - Job Processing
IOI
20p
29.5%
53
IOI '00 P2 - Car Parking
IOI
15p
17.7%
53
IOI '02 P5 - Bus Terminals
IOI
30p
14.8%
53
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