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Hot problems
CCC '19 S2 - Pretty Average Primes
IOI '94 P1 - The Triangle
CCC '24 S2 - Heavy-Light Composition
CCC '24 J3 - Bronze Count
DMOPC '20 Contest 4 P1 - Missing Numbers
SAC '22 Code Challenge 4 Junior P4 - Obligatory Permutation Problem
Problem
Category
Points
AC %
Users ▾
DMOPC '21 Contest 3 P3 - Hopping Frogs
DMOPC
15p
21.9%
53
Baltic OI '11 P2 - Ice Cream
Baltic OI
5p
35.7%
53
Yet Another Contest 6 P4 - No More Nails!
YAC
12p
11.3%
53
CCO '23 P4 - Flip it and Stick it
CCO
17p
6.8%
53
New Year's '15 P5 - Message to Mars
Seasonal
20p
14.4%
52
CCO '10 P5 - Space Miner
CCO
15
31.5%
52
JOI '13 Open P2 - Synchronization
JOI
35p
29.3%
52
MEC '16 P2 - Conveyor Belt
Seasonal
5p
20.3%
52
DMOPC '15 Contest 7 P6 - A Very Very Original Problem
DMOPC
20p
27.8%
52
DMPG '16 B5 - Bank Burning
DMOPC
5p
12.1%
52
ICPC NAQ 2016 H - Nine Packs
ICPC
10p
22.8%
52
GFSSOC '17 J5 - Choosing Extracurriculars
GFSSOC
7
29.5%
52
TLE '16 Contest 7 P3 - NOR
TLE
10p
31.2%
52
Mock CCO '17 Problem 4 - Guards
Mock CCO
15p
17.2%
52
TLE '17 Contest 1 P4 - Tempest
TLE
12p
12.3%
52
DWITE '10 R3 #2 - Unit rectangles
DWITE
5
54.5%
52
DMOPC '17 Contest 5 P5 - XOR Bridges
DMOPC
15p
18.7%
52
Dynamic Tree Test (Easy)
Data Structure Tests
25p
34.0%
52
Triway Cup '18 Summer A - Arranged Marriage
Seasonal
7
9.5%
52
VMSS Pre-Pre-Windsor P5 - Productive Math Class
Uncategorized
5
13.5%
52
Please Help Me
Uncategorized
15
18.1%
52
NOI '14 P5 - Random Number Generator
China NOI
12p
24.3%
52
NOI '09 P5 - Pipe Marbles
China NOI
25p
14.8%
52
Mock CCC '14 J4 - Selecting Shifts
Mock CCC
7p
11.5%
52
Mock DWITE '09 P3 - Trailing Bears!
Uncategorized
7
53.7%
52
Cheerio Contest 1 S3 - Stock Trading
Uncategorized
7p
26.0%
52
Yet Another Contest 4 P3 - Canadian Cactus Competition
YAC
12p
10.2%
52
NOIP '18 Junior P1 - Title Statistics
China NOI
3p
66.7%
52
UACC 1 P5 - A Lab Report
Uncategorized
10
14.3%
52
MNYC '16: Moore's Law
Seasonal
5p
11.6%
51
ECOO '16 R2 P2 - CC+
ECOO
7p
30.6%
51
Decoding
Uncategorized
20
5.7%
51
New Year's '17 P5 - The Christmas Swap
Seasonal
15
20.8%
51
COCI '06 Contest 6 #5 V
COCI
15p
20.3%
51
COCI '07 Contest 6 #5 Princeza
COCI
15
30.4%
51
APIO '16 P1 - Boat
APIO
20p
19.7%
51
LKP '18 Contest 1 P5 - The Treaty of Wellacotia
Uncategorized
17p
11.8%
51
LKP '18 Contest 1 P3 - Polynomial Madness
Uncategorized
7p
12.2%
51
CEOI '17 P1 - One-Way Streets
CEOI
25p
23.5%
51
DMOPC '19 Contest 7 P6 - Bob Equilibrium
DMOPC
30p
18.6%
51
COCI '19 Contest 4 #2 Spiderman
COCI
7p
19.7%
51
QCC P4 - Genetic Sequencing
Uncategorized
5p
54.4%
51
NOI '19 P1 - Route
China NOI
25p
12.1%
51
IOI '98 P5 - Camelot
IOI
15p
40.6%
51
WC '99 P3 - The Godfather
Woburn Challenge
5
28.9%
51
WC '17 Contest 2 S1 - Keeping Score
Woburn Challenge
5p
33.3%
51
WC '17 Finals S2 - Cowmmunication Network
Woburn Challenge
12p
27.3%
51
WC '17 Contest 3 S2 - GleamingProudChickenFunRun
Woburn Challenge
12p
17.1%
51
COCI '10 Contest 4 #2 Parket
COCI
5p
52.3%
51
COCI '11 Contest 5 #3 Dna
COCI
10p
48.0%
51
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