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Hot problems
CCC '21 S2 - Modern Art
Baltic OI '17 P5 - Plus Minus
IOI '11 P4 - Crocodile's Underground City
COCI '08 Contest 3 #2 Kemija
IOI '06 P4 - The Valley of Mexico
CCC '00 S1 - Slot Machines
Please Help Me
Problem
Category
Points
AC %
Users
CCC '15 J4 - Wait Time
CCC
5
39.4%
1384
CCC '15 J5 - π-day
CCC
10p
27.5%
1542
CCC '15 S1 - Zero That Out
CCC
3
51.0%
4007
CCC '15 S2 - Jerseys
CCC
5p
26.8%
2019
CCC '15 S3 - Gates
CCC
10p
19.0%
1866
CCC '15 S4 - Convex Hull
CCC
15p
27.4%
1197
CCC '15 S5 - Greedy For Pies
CCC
17p
23.7%
573
CCC '16 J1 - Tournament Selection
CCC
3
41.3%
4954
CCC '16 J2 - Magic Squares
CCC
3
34.5%
3460
CCC '16 J3 - Hidden Palindrome
CCC
5
46.4%
2718
CCC '16 J4 - Arrival Time
CCC
5
28.9%
1755
CCC '16 S1 - Ragaman
CCC
3p
29.9%
2416
CCC '16 S2 - Tandem Bicycle
CCC
5p
53.2%
3653
CCC '16 S3 - Phonomenal Reviews
CCC
12p
26.0%
1174
CCC '16 S4 - Combining Riceballs
CCC
15p
28.9%
1008
CCC '16 S5 - Circle of Life
CCC
20p
22.1%
624
CCC '17 J1 - Quadrant Selection
CCC
3
61.0%
5880
CCC '17 J2 - Shifty Sum
CCC
3
54.3%
4830
CCC '17 J3 - Exactly Electrical
CCC
3p
30.1%
2506
CCC '17 J4 - Favourite Times
CCC
5p
23.4%
1659
CCC '17 S1 - Sum Game
CCC
3
47.5%
3320
CCC '17 S2 - High Tide, Low Tide
CCC
5
27.9%
2965
CCC '17 S3 - Nailed It!
CCC
7p
30.6%
1802
CCC '17 S4 - Minimum Cost Flow
CCC
17p
14.0%
792
CCC '17 S5 - RMT
CCC
20p
19.5%
255
CCC '18 J1 - Telemarketer or not?
CCC
3
39.9%
7464
CCC '18 J2 - Occupy parking
CCC
3
53.4%
6154
CCC '18 J3 - Are we there yet?
CCC
3
56.0%
3328
CCC '18 J5 - Choose your own path
CCC
7p
24.4%
1679
CCC '18 S1 - Voronoi Villages
CCC
3p
33.9%
3766
CCC '18 S2 - Sunflowers
CCC
5p
39.5%
2959
CCC '18 S3 - RoboThieves
CCC
12p
14.2%
1176
CCC '18 S4 - Balanced Trees
CCC
15p
17.1%
605
CCC '18 S5 - Maximum Strategic Savings
CCC
20p
26.9%
419
CCC '19 J1 - Winning Score
CCC
3
50.7%
7599
CCC '19 J2 - Time to Decompress
CCC
3
52.7%
3558
CCC '19 J3 - Cold Compress
CCC
5
46.1%
3414
CCC '19 J5 - Rule of Three
CCC
20p
0.7%
7
CCC '19 S1 - Flipper
CCC
3p
46.4%
4147
CCC '19 S2 - Pretty Average Primes
CCC
5p
26.2%
2486
CCC '19 S3 - Arithmetic Square
CCC
12p
13.8%
533
CCC '19 S4 - Tourism
CCC
20p
7.8%
266
CCC '19 S5 - Triangle: The Data Structure
CCC
20p
18.3%
387
CCC '20 J1 - Dog Treats
CCC
3
56.3%
4315
CCC '20 J2 - Epidemiology
CCC
3
27.1%
4060
CCC '20 J3 - Art
CCC
3p
42.9%
2517
CCC '20 J4 - Cyclic Shifts
CCC
5p
45.6%
2438
CCC '20 J4 - Cyclic Shifts (Hard)
CCC
12p
3.7%
45
CCC '20 S1 - Surmising a Sprinter's Speed
CCC
5p
43.3%
2184
CCC '20 S2 - Escape Room
CCC
10p
12.7%
1786
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