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Random
Hot problems
Educational DP Contest AtCoder C - Vacation
CCCHK '15 J3 - Queens can't attack me!
COCI '14 Contest 5 #3 Traktor
IOI '04 P4 - Phidias
DMOPC '18 Contest 1 P2 - Sorting
CCC '24 J5 - Harvest Waterloo
CCC '19 J3 - Cold Compress
Problem
Category ▴
Points
AC %
Users
Baltic OI '14 P3 - Sequence
Baltic OI
30p
30.0%
4
Baltic OI '14 P4 - Demarcation
Baltic OI
40p
5.3%
1
Baltic OI '14 P5 - Portals
Baltic OI
15p
23.4%
16
Baltic OI '14 P6 - Senior Postmen
Baltic OI
15p
19.8%
14
Baltic OI '06 P6 - Jump
Baltic OI
7p
15.3%
22
Baltic OI '12 P1 - Brackets
Baltic OI
15p
32.7%
12
Baltic OI '12 P2 - Mobile
Baltic OI
15p
15.2%
8
Baltic OI '12 P3 - Peaks
Baltic OI
17p
31.3%
5
Baltic OI '12 P4 - Fireworks in RightAngleles
Baltic OI
25p
70.0%
5
Baltic OI '12 P5 - Melody
Baltic OI
17p
18.9%
7
Baltic OI '04 P1 - Ships
Baltic OI
7p
14.3%
11
Baltic OI '04 P2 - Scales
Baltic OI
10p
44.4%
4
Baltic OI '04 P3 - Sequence
Baltic OI
30p
30.8%
7
Baltic OI '04 P4 - Repeats
Baltic OI
30p
50.0%
3
Baltic OI '12 P6 - Tiny
Baltic OI
30p
0.0%
0
Baltic OI '04 P5 - Rectangles
Baltic OI
10p
10.0%
5
Baltic OI '04 P6 - Car Park
Baltic OI
25p
20.0%
1
Baltic OI '02 P1 - Speed Limits
Baltic OI
12p
26.3%
16
Baltic OI '02 P2 - Tennis Club
Baltic OI
12p
34.0%
13
Baltic OI '02 P3 - Triangles
Baltic OI
12p
18.0%
8
Baltic OI '02 P4 - Bicriterial Routing
Baltic OI
12
40.9%
8
Baltic OI '03 P3 - Table
Baltic OI
10p
9.1%
2
Baltic OI '01 P1 - Postman
Baltic OI
10p
18.7%
25
Baltic OI '01 P3 - Box of Mirrors
Baltic OI
20p
12.5%
7
Baltic OI '01 P2 - Crack the Code
Baltic OI
20p
8.3%
1
Baltic OI '01 P4 - Knights
Baltic OI
17p
14.8%
8
Baltic OI '01 P5 - Mars Maps
Baltic OI
15p
14.7%
29
Baltic OI '01 P6 - Teleports
Baltic OI
10p
37.8%
24
CCC '14 J1 - Triangle Times
CCC
3
32.9%
7453
CCC '14 J2 - Vote Count
CCC
3
44.6%
5335
CCC '14 J3 - Double Dice
CCC
3
56.4%
4471
CCC '96 S1 - Deficient, Perfect, and Abundant
CCC
5
32.3%
1891
CCC '09 J1 - ISBN
CCC
3
47.4%
3678
CCC '13 J1 - Next in line
CCC
3
62.3%
12001
CCC '13 S1 - From 1987 to 2013
CCC
5
45.7%
3906
CCC '13 J2 - Rotating letters
CCC
3
45.0%
4809
CCC '05 S5 - Pinball Ranking
CCC
12p
19.5%
737
CCC '14 S1 - Party Invitation
CCC
5
47.1%
3516
CCC '14 S2 - Assigning Partners
CCC
5
33.2%
2838
CCC '13 J4 - Time on task
CCC
5
44.5%
3001
CCC '14 S3 - The Geneva Confection
CCC
7p
26.4%
2800
CCC '12 J1 - Speed fines are not fine!
CCC
3
30.8%
5766
CCC '12 J2 - Sounds fishy!
CCC
3
33.8%
4569
CCC '12 J3 - Icon Scaling
CCC
3
51.2%
2875
CCC '13 S3 - Chances of Winning
CCC
10
41.1%
1358
CCC '12 J4 - Big Bang Secrets
CCC
3
59.2%
2393
CCC '98 S1 - Censor
CCC
5
37.5%
1467
CCC '11 J1 - Which Alien?
CCC
3
35.6%
6364
CCC '05 J1 - The Cell Sell
CCC
3
8.0%
1445
CCC '05 J2 - RSA Numbers
CCC
3
40.8%
2970
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