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Random
Hot problems
CCC '24 S2 - Heavy-Light Composition
APIO '09 P3 - The Great ATM Robbery
COCI '11 Contest 5 #2 Eko
String Finding
CCC '24 J4 - Troublesome Keys
CCO '07 P2 - Snowflakes
Problem
Category
Points
AC %
Users ▾
WC '18 Contest 3 J1 - An Honest Day's Work
Woburn Challenge
3p
57.6%
3161
CCC '21 J1 - Boiling Water
CCC
3p
53.8%
3156
CCC '19 J3 - Cold Compress
CCC
5
46.2%
3155
CCC '18 J3 - Are we there yet?
CCC
3
55.9%
3108
CCC '03 S1 - Snakes and Ladders
CCC
5
20.5%
3105
CCC '06 J2 - Roll the Dice
CCC
3
27.1%
3035
CCC '13 J4 - Time on task
CCC
5
44.5%
3009
CCC '05 J2 - RSA Numbers
CCC
3
40.8%
2976
CCC '22 J1 - Cupcake Party
CCC
3
55.5%
2923
CCC '12 J3 - Icon Scaling
CCC
3
51.3%
2881
CCC '01 J1 - Dressing Up
CCC
3
48.2%
2873
CCC '11 J3 - Sumac Sequences
CCC
5
43.3%
2871
CCC '14 S2 - Assigning Partners
CCC
5
33.3%
2843
CCC '17 S2 - High Tide, Low Tide
CCC
5
27.9%
2843
CCC '14 S3 - The Geneva Confection
CCC
7p
26.4%
2807
CCC '18 S2 - Sunflowers
CCC
5p
39.5%
2807
DMOPC '16 Contest 1 P0 - C.C. and Cheese-kun
DMOPC
3p
37.7%
2794
CCC '21 J2 - Silent Auction
CCC
3p
51.2%
2745
16 BIT S/W ONLY
Uncategorized
3
36.8%
2691
CCC '22 J2 - Fergusonball Ratings
CCC
3
47.6%
2668
COCI '06 Contest 5 #1 Trik
COCI
3
52.9%
2581
CCC '21 S1 - Crazy Fencing
CCC
5p
47.7%
2557
CCC '16 J3 - Hidden Palindrome
CCC
5
45.9%
2551
CCC '00 S2 - Babbling Brooks
CCC
7
34.1%
2532
CCC '01 J2 - Mod Inverse
CCC
3
42.9%
2531
CCC '21 J3 - Secret Instructions
CCC
5p
36.1%
2514
An Animal Contest 1 P1 - Alpaca Shapes
AAC
3p
39.9%
2405
CCC '10 J5 - Knight Hop
CCC
7
36.6%
2404
COCI '16 Contest 1 #1 Tarifa
COCI
3
58.6%
2402
CCC '12 J4 - Big Bang Secrets
CCC
3
59.2%
2401
WC '17 Contest 3 J3 - Uncrackable
Woburn Challenge
5
28.9%
2381
CCC '17 J3 - Exactly Electrical
CCC
3p
29.9%
2370
CCC '20 J3 - Art
CCC
3p
42.9%
2365
CCC '05 J3 - Returning Home
CCC
5
37.3%
2363
CCC '19 S2 - Pretty Average Primes
CCC
5p
25.9%
2355
Boolean
Uncategorized
3
50.4%
2352
CCC '07 S1 - Federal Voting Age
CCC
3
36.2%
2328
CCC '03 J1 - Trident
CCC
3
28.6%
2324
CCC '00 S4 - Golf
CCC
7
24.4%
2305
CCC '16 S1 - Ragaman
CCC
3p
29.7%
2300
CCC '07 J2 - I Speak TXTMSG
CCC
3
21.7%
2283
CCC '20 J4 - Cyclic Shifts
CCC
5p
45.7%
2283
CCC '05 S1 - Snow Calls
CCC
5
43.3%
2278
CCC '15 J3 - Rövarspråket
CCC
5p
38.5%
2266
CCC '21 S2 - Modern Art
CCC
7p
28.9%
2249
Scroll
Seasonal
0
55.6%
2243
CCC '12 S1 - Don't pass me the ball!
CCC
3
56.4%
2234
Next Prime
Classics
5
19.8%
2182
CCC '08 S1 - It's Cold Here!
CCC
5
37.4%
2177
CCC '22 S1 - Good Fours and Good Fives
CCC
5p
39.4%
2127
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