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Hot problems
CCC '17 S5 - RMT
ECOO '19 R2 P1 - Email
COCI '06 Regional #1 Bard
Tree Tasks
COCI '15 Contest 2 #1 Marko
Summer Institute '17 Contest 1 P8 - Mo' Money
CCC '13 S1 - From 1987 to 2013
Problem
Category
Points
AC %
Users
NOI '19 P5 - Landlords
China NOI
25p
20.9%
17
NOI '19 P6 - Explore
China NOI
25p
2.7%
12
NOI '20 P1 - Delicacy
China NOI
25p
14.5%
40
NOI '20 P2 - Destiny
China NOI
25p
17.3%
18
NOI '20 P3 - Tears
China NOI
40p
11.0%
8
NOI '20 P4 - Dish
China NOI
20p
9.2%
28
NOI '20 P5 - Surreal
China NOI
17p
11.6%
22
NOI '20 P6 - Road
China NOI
45p
4.3%
2
NOI '21 P1 - Light Heavy Edges
China NOI
25p
10.5%
36
NOI '21 P2 - Intersecting Paths
China NOI
25p
25.5%
20
NOI '21 P3 - Celebration
China NOI
25p
10.1%
26
NOI '21 P4 - Quantum Communication
China NOI
25p
9.1%
23
NOI '21 P5 - The Locked Box
China NOI
25p
12.8%
10
NOI '21 P6 - Robot Game
China NOI
25p
18.5%
5
NOI '22 P1 - Major
China NOI
25p
6.4%
16
NOI '22 P2 - Stone
China NOI
30p
25.0%
3
NOI '22 P3 - Count
China NOI
40p
0.0%
0
NOI '22 P4 - Challenge NPC
China NOI
25p
30.6%
8
NOI '22 P5 - Bubble Sort
China NOI
35p
3.7%
3
NOI '22 P6 - Quadratic Integer Program
China NOI
40p
0.0%
0
NOI '23 P1 - Square Coloring
China NOI
17p
24.3%
15
NOI '23 P2 - Osmanthus Tree
China NOI
25p
17.8%
8
NOI '23 P3 - Depth First Search
China NOI
35p
25.0%
2
NOI '23 P4 - Trade
China NOI
20p
33.3%
11
NOI '23 P5 - String
China NOI
25p
16.7%
9
NOI '23 P6 - Merge the Books
China NOI
30p
18.2%
4
NOI '97 P1 - Competition Ranking
China NOI
7
32.1%
42
NOI '97 P2 - Optimal Routing
China NOI
7p
26.9%
64
NOI '97 P3 - File Matching
China NOI
25p
2.6%
2
NOI '97 P4 - Perfect Tour
China NOI
5
31.9%
160
NOI '97 P5 - Building Game
China NOI
15p
27.4%
25
NOI '97 P6 - Satellite Coverage
China NOI
12p
36.7%
28
NOI '98 P1 - Personal Income Tax
China NOI
7
57.1%
28
NOI '98 P2 - Free Pizza
China NOI
15p
17.6%
18
NOI '98 P3 - Software Installation Disk
China NOI
15p
52.2%
6
NOI '98 P4 - Scarf Cutting
China NOI
15p
25.9%
13
NOI '98 P5 - SERNET Simulation
China NOI
12p
10.6%
18
NOI '98 P6 - Parallel Computing
China NOI
25p
0.0%
0
NOI '99 P1 - 01 Sequence
China NOI
20p
28.4%
16
NOI '99 P2 - Nails and Ball
China NOI
15p
20.5%
16
NOI '99 P3 - Birthday Cake
China NOI
20p
13.2%
7
NOI '99 P4 - Chessboard Division
China NOI
15p
19.5%
16
NOI '99 P5 - Optimally Connected Subset
China NOI
15p
53.8%
21
NOI '99 P6 - Memory Allocation
China NOI
20p
6.5%
9
NOI '22 Multi-Provincial Team Selection P1 - Preprocessor
China NOI
10p
8.8%
13
NOI '22 Multi-Provincial Team Selection P2 - Tree
China NOI
25p
11.1%
6
NOI '22 Multi-Provincial Team Selection P3 - Community
China NOI
40p
2.9%
1
NOI '22 Multi-Provincial Team Selection P4 - Card
China NOI
25p
11.7%
6
NOI '22 Multi-Provincial Team Selection P5 - Bracket
China NOI
35p
6.8%
6
NOI '22 Multi-Provincial Team Selection P6 - MIS
China NOI
40p
8.3%
2
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