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Random
Hot problems
CCC '16 J3 - Hidden Palindrome
CCC '21 S2 - Modern Art
CCC '19 S5 - Triangle: The Data Structure
CCC '16 S2 - Tandem Bicycle
CCC '24 J3 - Bronze Count
CCC '13 S1 - From 1987 to 2013
CCC '22 J3 - Harp Tuning
Problem
Category
Points
AC %
Users
CCC '11 J2 - Who Has Seen The Wind
CCC
5
25.8%
2013
CCC '11 J3 - Sumac Sequences
CCC
5
43.4%
3031
CCC '11 J4 - Boring Business
CCC
7
27.8%
1582
CCC '11 J5 - Unfriend
CCC
7
46.9%
1038
CCC '11 S1 - English or French?
CCC
5
35.4%
6174
CCC '11 S2 - Multiple Choice
CCC
3
54.8%
6652
CCC '11 S3 - Alice Through the Looking Glass
CCC
10p
36.2%
1243
CCC '11 S4 - Blood Distribution
CCC
15p
8.1%
170
CCC '11 S5 - Switch
CCC
12p
17.7%
429
CCC '12 J1 - Speed fines are not fine!
CCC
3p
28.3%
5594
CCC '12 J2 - Sounds fishy!
CCC
3
34.3%
4853
CCC '12 J3 - Icon Scaling
CCC
3
50.8%
3015
CCC '12 J4 - Big Bang Secrets
CCC
3
59.2%
2509
CCC '12 S1 - Don't pass me the ball!
CCC
3
56.3%
2317
CCC '12 S2 - Aromatic Numbers
CCC
5
53.3%
1778
CCC '12 S3 - Absolutely Acidic
CCC
7
26.7%
1935
CCC '12 S4 - A Coin Game
CCC
15
27.0%
475
CCC '12 S5 - Mouse Journey
CCC
7
45.7%
1876
CCC '13 J1 - Next in line
CCC
3
62.4%
12933
CCC '13 J2 - Rotating letters
CCC
3
45.1%
5077
CCC '13 J4 - Time on task
CCC
5
44.7%
3170
CCC '13 S1 - From 1987 to 2013
CCC
5
46.3%
4159
CCC '13 S2 - Bridge Transport
CCC
5
26.8%
2123
CCC '13 S3 - Chances of Winning
CCC
10
41.5%
1418
CCC '13 S4 - Who is Taller?
CCC
7
16.8%
1284
CCC '13 S5 - Factor Solitaire
CCC
15p
42.1%
766
CCC '14 J1 - Triangle Times
CCC
3
32.8%
7911
CCC '14 J2 - Vote Count
CCC
3
44.8%
5670
CCC '14 J3 - Double Dice
CCC
3
56.1%
4736
CCC '14 S1 - Party Invitation
CCC
5
47.1%
3674
CCC '14 S2 - Assigning Partners
CCC
5
33.4%
2964
CCC '14 S3 - The Geneva Confection
CCC
7p
26.3%
2903
CCC '14 S4 - Tinted Glass Window
CCC
15p
29.4%
701
CCC '14 S5 - Lazy Fox
CCC
20p
18.0%
476
CCC '15 J1 - Special Day
CCC
3
36.7%
9074
CCC '15 J2 - Happy or Sad
CCC
3
37.4%
7627
CCC '15 J3 - Rövarspråket
CCC
5p
39.0%
2413
CCC '15 J4 - Wait Time
CCC
5
39.3%
1391
CCC '15 J5 - π-day
CCC
10p
27.5%
1547
CCC '15 S1 - Zero That Out
CCC
3
51.1%
4018
CCC '15 S2 - Jerseys
CCC
5p
26.8%
2024
CCC '15 S3 - Gates
CCC
10p
18.9%
1875
CCC '15 S4 - Convex Hull
CCC
15p
27.5%
1201
CCC '15 S5 - Greedy For Pies
CCC
17p
23.7%
577
CCC '16 J1 - Tournament Selection
CCC
3
41.3%
4979
CCC '16 J2 - Magic Squares
CCC
3
34.5%
3478
CCC '16 J3 - Hidden Palindrome
CCC
5
46.5%
2743
CCC '16 J4 - Arrival Time
CCC
5
29.0%
1766
CCC '16 S1 - Ragaman
CCC
3p
30.0%
2450
CCC '16 S2 - Tandem Bicycle
CCC
5p
53.3%
3675
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