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Hot problems
DWITE '10 R3 #3 - Dominos Tiling
Counting Subsequences
A Math Contest P5 - Good Arrays
ECOO '13 R1 P1 - Take a Number
CCC '24 J3 - Bronze Count
CCC '24 J5 - Harvest Waterloo
WC '96 P6 - Bases Multiplication
Problem
Category
Points
AC % ▾
Users
IOI '14 P5 - Friend
IOI
30p
26.2%
99
IOI '22 P4 - Digital Circuit
IOI
25p
25.2%
25
IOI '18 P2 - Seats
IOI
40p
25.0%
7
IOI '14 P2 - Wall
IOI
20p
24.7%
211
IOI '02 P2 - Utopia Divided
IOI
20p
24.5%
91
IOI '95 P5 - Street Race
IOI
15p
24.1%
39
IOI '18 P3 - Werewolf
IOI
30p
24.0%
57
IOI '96 P3 - Network of Schools
IOI
12p
23.7%
83
IOI '04 P2 - Hermes
IOI
15p
23.5%
188
IOI '10 P5 - Memory
IOI
5p
23.0%
136
IOI '13 P1 - Dreaming
IOI
15p
22.9%
229
IOI '18 P4 - Mechanical Doll
IOI
20p
22.6%
13
IOI '06 P2 - Pyramid
IOI
17p
22.5%
218
IOI '06 P4 - The Valley of Mexico
IOI
15p
22.0%
214
IOI '12 P5 - Last Supper
IOI
30p
21.9%
6
IOI '99 P5 - Flatten
IOI
15p
21.8%
16
IOI '15 P5 - Sorting
IOI
25p
21.8%
71
IOI '95 Practice Task 1 - Fence Factory
IOI
15p
21.7%
10
IOI '05 P1 - Garden
IOI
20p
21.7%
252
IOI '07 P3 - Sails
IOI
25p
21.4%
210
IOI '07 P4 - Miners
IOI
15p
21.2%
444
IOI '05 P2 - Mean Sequence
IOI
12p
20.9%
271
IOI '96 P5 - Longest Prefix
IOI
12
20.8%
112
IOI '08 P1 - Type Printer
IOI
12p
20.0%
410
IOI '11 P3 - Rice Hub (Standard I/O)
IOI
15p
19.4%
496
IOI '11 P4 - Crocodile's Underground City (Standard I/O)
IOI
17p
19.1%
374
IOI '94 P2 - The Castle
IOI
10
18.8%
127
IOI '13 P4 - Cave
IOI
10p
18.6%
311
IOI '15 P5 - Sorting (Standard I/O)
IOI
25p
18.6%
186
IOI '11 P2 - Race
IOI
17p
18.6%
212
IOI '00 P1 - Palindrome
IOI
10p
18.5%
830
IOI '13 P1 - Dreaming (Standard I/O)
IOI
15p
18.4%
532
IOI '13 P5 - Robots
IOI
20p
18.3%
90
IOI '11 P3 - Rice Hub
IOI
15p
18.2%
125
IOI '10 P6 - Traffic Congestion
IOI
10p
18.2%
94
IOI '14 P5 - Friend (Standard I/O)
IOI
30p
18.2%
189
IOI '00 P2 - Car Parking
IOI
15p
17.7%
53
IOI '16 P5 - Unscrambling a Messy Bug
IOI
20p
17.7%
65
IOI '03 P2 - Comparing Code
IOI
25p
17.6%
32
IOI '17 P3 - Toy Train
IOI
30p
17.3%
40
IOI '04 P6 - Empodia
IOI
30p
16.9%
140
IOI '12 P3 - Crayfish Scrivener (Standard I/O)
IOI
15p
16.8%
276
IOI '09 P8 - Salesman
IOI
25p
16.8%
133
IOI '01 P3 - Twofive
IOI
25p
16.8%
64
IOI '12 P6 - Jousting Tournament (Standard I/O)
IOI
17p
16.7%
12
IOI '02 P1 - The Troublesome Frog
IOI
15p
16.5%
78
IOI '19 P1 - Arranging Shoes
IOI
15p
16.4%
136
IOI '12 P6 - Jousting Tournament
IOI
17p
16.4%
16
IOI '03 P6 - Seeing the Boundary
IOI
20p
16.1%
63
IOI '14 P6 - Holiday
IOI
30p
15.9%
84
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