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Hot problems
COCI '21 Contest 5 #4 Radio
APIO '15 P3 - Palembang Bridges
CCC '26 S2 - Beams of Light
CCC '26 S1 - Baby Hop, Giant Hop
COCI '22 Contest 4 #2 Zrinka
Longest Increasing Subsequence
COCI '07 Regional #2 Nikola
Problem
Category
Points
AC %
Users
IOI '03 P5 - Amazing Robots
IOI
20
11.9%
42
IOI '03 P6 - Seeing the Boundary
IOI
20p
16.7%
108
IOI '03 Practice Task 1 - Balancing Act
IOI
15
43.6%
130
IOI '04 P1 - Artemis
IOI
15p
7.3%
77
IOI '04 P2 - Hermes
IOI
15p
23.8%
199
IOI '04 P2 - Hermes (Hard)
IOI
20p
8.3%
15
IOI '04 P3 - Polygon
IOI
20p
10.5%
2
IOI '04 P4 - Phidias
IOI
10p
54.7%
1348
IOI '04 P5 - Farmer
IOI
15p
13.1%
239
IOI '04 P6 - Empodia
IOI
30p
16.9%
177
IOI '05 P1 - Garden
IOI
20p
22.1%
292
IOI '05 P2 - Mountain
IOI
20p
13.3%
399
IOI '05 P3 - Mean Sequence
IOI
12p
20.9%
310
IOI '05 P4 - Birthday
IOI
12p
15.1%
150
IOI '05 P6 - Rivers
IOI
20p
30.4%
335
IOI '05 Practice Task 3 - Polish Flag
IOI
20p
8.1%
5
IOI '06 P1 - Deciphering the Mayan Writing
IOI
7p
39.0%
473
IOI '06 P2 - Pyramid
IOI
17p
22.5%
253
IOI '06 P4 - The Valley of Mexico
IOI
15p
22.6%
233
IOI '07 P1 - Aliens
IOI
12p
15.4%
36
IOI '07 P2 - Flood
IOI
25p
39.0%
145
IOI '07 P3 - Sails
IOI
25p
21.6%
238
IOI '07 P4 - Miners
IOI
15p
21.8%
472
IOI '07 P5 - Pairs
IOI
25p
10.6%
131
IOI '07 P6 - Training
IOI
40p
28.6%
77
IOI '08 P1 - Type Printer
IOI
12p
18.6%
478
IOI '08 P2 - Islands
IOI
25p
12.7%
135
IOI '08 P3 - Fish
IOI
35p
10.5%
70
IOI '08 P4 - Teleporters
IOI
25p
31.9%
24
IOI '08 P6 - Pyramid Base
IOI
40p
9.6%
13
IOI '09 P1 - Archery
IOI
45p
13.9%
43
IOI '09 P2 - Hiring
IOI
12p
31.9%
275
IOI '09 P3 - POI
IOI
7
29.2%
573
IOI '09 P4 - Raisins
IOI
10p
53.4%
593
IOI '09 P5 - Garage
IOI
7
46.9%
583
IOI '09 P6 - Mecho
IOI
10
14.7%
362
IOI '09 P7 - Regions
IOI
20p
10.4%
88
IOI '09 P8 - Salesman
IOI
25p
16.8%
140
IOI '09 Practice Task 3 - Museum
IOI
15p
48.5%
87
IOI '10 P1 - Cluedo
IOI
5p
34.3%
184
IOI '10 P2 - Hotter Colder
IOI
20
0.7%
4
IOI '10 P3 - Quality of Living
IOI
15p
28.6%
188
IOI '10 P3 - Quality of Living (Standard I/O)
IOI
15p
28.5%
372
IOI '10 P5 - Memory
IOI
5p
20.3%
179
IOI '10 P6 - Traffic Congestion
IOI
10p
20.6%
122
IOI '10 P6 - Traffic Congestion (Standard I/O)
IOI
10p
34.1%
444
IOI '10 P7 - Maze
IOI
25p
0.0%
0
IOI '11 P1 - Tropical Garden
IOI
25p
16.6%
55
IOI '11 P1 - Tropical Garden (Standard I/O)
IOI
25p
11.7%
175
IOI '11 P2 - Race
IOI
17p
19.1%
280
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