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Hot problems
DWITE '10 R3 #3 - Dominos Tiling
APIO '10 P1 - Commando
Counting Subsequences
A Math Contest P5 - Good Arrays
ECOO '13 R1 P1 - Take a Number
CCC '24 J3 - Bronze Count
An Animal Contest 2 P3 - Koala Balloons
Problem
Category ▴
Points
AC %
Users
CCC '14 J1 - Triangle Times
CCC
3
32.9%
7482
CCC '14 J2 - Vote Count
CCC
3
44.5%
5375
CCC '14 J3 - Double Dice
CCC
3
56.3%
4489
CCC '96 S1 - Deficient, Perfect, and Abundant
CCC
5
32.3%
1894
CCC '09 J1 - ISBN
CCC
3
47.3%
3696
CCC '13 J1 - Next in line
CCC
3
62.3%
12087
CCC '13 S1 - From 1987 to 2013
CCC
5
45.8%
3925
CCC '13 J2 - Rotating letters
CCC
3
45.0%
4841
CCC '05 S5 - Pinball Ranking
CCC
12p
19.5%
741
CCC '14 S1 - Party Invitation
CCC
5
47.1%
3528
CCC '14 S2 - Assigning Partners
CCC
5
33.3%
2846
CCC '13 J4 - Time on task
CCC
5
44.5%
3017
CCC '14 S3 - The Geneva Confection
CCC
7p
26.4%
2812
CCC '12 J1 - Speed fines are not fine!
CCC
3
30.8%
5790
CCC '12 J2 - Sounds fishy!
CCC
3
33.8%
4595
CCC '12 J3 - Icon Scaling
CCC
3
51.3%
2882
CCC '13 S3 - Chances of Winning
CCC
10
41.2%
1365
CCC '12 J4 - Big Bang Secrets
CCC
3
59.2%
2409
CCC '98 S1 - Censor
CCC
5
37.5%
1476
CCC '11 J1 - Which Alien?
CCC
3
35.6%
6392
CCC '05 J1 - The Cell Sell
CCC
3
8.0%
1454
CCC '05 J2 - RSA Numbers
CCC
3
40.8%
2980
CCC '05 J3 - Returning Home
CCC
5
37.2%
2364
CCC '05 J5 - Bananas
CCC
10
21.6%
1470
CCC '06 J2 - Roll the Dice
CCC
3
27.2%
3042
CCC '06 S5 - Origin of Life
CCC
15
18.6%
119
CCC '06 J3 - Cell-Phone Messaging
CCC
3
41.4%
1467
CCC '06 J1 - Canadian Calorie Counting
CCC
3
27.4%
7229
CCC '11 J2 - Who Has Seen The Wind
CCC
5
25.7%
1867
CCC '11 J3 - Sumac Sequences
CCC
5
43.3%
2877
CCC '06 J4 - It's tough being a teen!
CCC
7
41.5%
1242
CCC '11 J4 - Boring Business
CCC
7
27.8%
1509
CCC '06 S1 - Maternity
CCC
5
37.5%
1147
CCC '06 S2 - Attack of the CipherTexts
CCC
5
5.2%
239
CCC '06 S3 - Tin Can Telephone
CCC
12
20.8%
528
CCC '06 S4 - Groups
CCC
10
46.5%
328
CCC '11 S1 - English or French?
CCC
5
35.6%
5780
CCC '11 S2 - Multiple Choice
CCC
3
55.1%
6284
CCC '08 S3 - Maze
CCC
7
29.3%
1564
CCC '03 S4 - Substrings
CCC
15p
7.7%
372
CCC '04 J1 - Squares
CCC
3
32.5%
6136
CCC '04 J2 - Terms of Office
CCC
3
37.4%
3514
CCC '04 J3 - Smile with Similes
CCC
3
57.8%
3974
CCC '04 J4 - Simple Encryption
CCC
5
51.0%
1711
CCC '04 J5 - Fractals
CCC
10
35.7%
220
CCC '07 J1 - Who is in the Middle?
CCC
3
47.0%
9183
CCC '07 J2 - I Speak TXTMSG
CCC
3
21.7%
2290
CCC '07 J3 - Deal or No Deal Calculator
CCC
3
33.0%
3259
CCC '07 J5 - Keep on Truckin'
CCC
7
19.7%
1073
CCC '07 S5 - Bowling for Numbers
CCC
10p
29.9%
868
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