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Random
Hot problems
CCC '16 S4 - Combining Riceballs
Appleby Contest '19 P5 - Matrix Operation
Cheerio Contest 1 S2 - School Expansion
WC '96 P6 - Bases Multiplication
DMOPC '23 Contest 1 P1 - Peak Grid
Max's Anger Contest Series 2 P3 - Array Anger
CCCHK '15 J4 - Where to build my house?
Problem
Category ▾
Points
AC %
Users
APIO '12 P3 - Kunai
APIO
40p
12.4%
27
APIO '10 P1 - Commando
APIO
20p
25.7%
548
APIO '10 P2 - Patrol
APIO
20p
17.3%
206
APIO '10 P3 - Signaling
APIO
25p
19.6%
45
APIO '07 P1 - Mobiles
APIO
12p
30.4%
67
APIO '14 P1 - Palindromes
APIO
25p
18.2%
59
APIO '14 P2 - Split the Sequence
APIO
25p
11.5%
142
APIO '13 P1 - Robots
APIO
20p
9.4%
11
APIO '11 P1 - Table Coloring
APIO
25p
22.5%
97
APIO '18 P1 - New Home
APIO
25
6.3%
9
APIO '18 P3 - Duathlon
APIO
30
28.4%
44
APIO '13 P2 - Toll
APIO
35p
20.6%
13
APIO '11 P2 - Find the Path
APIO
20p
25.3%
44
APIO '07 P2 - Backup
APIO
25p
16.0%
69
APIO '07 P3 - Zoo
APIO
20p
32.3%
60
APIO '09 P1 - Digging for Oil
APIO
20p
17.0%
134
APIO '09 P2 - The Siruseri Convention Centre
APIO
25p
18.4%
65
APIO '09 P3 - The Great ATM Robbery
APIO
20p
7.4%
128
APIO '18 P2 - Circle Selection
APIO
40p
12.4%
6
APIO '14 P3 - Beads and Wires
APIO
25p
24.1%
24
APIO '11 P3 - Guess My Word!
APIO
30p
23.9%
8
APIO '19 P1 - Strange Device
APIO
20
21.1%
50
APIO '19 P2 - Bridges
APIO
30p
11.2%
49
APIO '19 P3 - Street Lamps
APIO
35p
10.9%
30
APIO '17 P2 - Travelling Merchant
APIO
20p
23.2%
46
APIO '08 P2 - Roads
APIO
20p
16.1%
82
APIO '08 P3 - DNA
APIO
15p
30.8%
32
APIO '17 P1 - Land of the Rainbow Gold
APIO
30p
15.5%
14
APIO '22 P3 - Permutation
APIO
20p
9.8%
12
APIO '22 P2 - Game
APIO
25p
1.9%
3
APIO '23 P1 - Cyberland
APIO
17p
8.8%
33
APIO '23 P2 - Sequence
APIO
25p
7.8%
17
APIO '23 P3 - Alice, Bob, and Circuit
APIO
45p
0.0%
0
Another Contest 1 Problem 1 - Binary String Operations
ACC
25
12.1%
44
Another Contest 1 Problem 2 - Graphs
ACC
15
6.5%
76
Another Contest 1 Problem 3 - Poutine
ACC
10
4.1%
58
Another Contest 2 Problem 1 - Poutine
ACC
15
14.6%
106
Another Contest 2 Problem 2 - Poutine
ACC
10
28.7%
143
Another Contest 2 Problem 3 - Poutine
ACC
15
26.9%
133
Another Contest 3 Problem 1 - Diverse Arrays
ACC
7
17.2%
335
Another Contest 3 Problem 2 - Camelot
ACC
15
16.3%
75
Another Contest 3 Problem 3 - Lexicographically Largest Common Subsequence
ACC
7
17.9%
168
Another Contest 3 Problem 4 - Range Updates and Range Queries
ACC
15
14.2%
54
Another Contest 4 Problem 1 - Identity Crisis
ACC
0
34.9%
339
Another Contest 5 Problem 2 - Great Graffiti
ACC
5p
18.4%
217
Another Contest 4 Problem 2 - The Deutsch-Jozsa Algorithm
ACC
0
73.5%
261
Another Contest 4 Problem 3 - An Isosceles Right Triangle
ACC
0
71.6%
192
Another Contest 4 Problem 4 - Another Isosceles Right Triangle
ACC
0
45.8%
118
Another Contest 4 Problem 0 - The April Fools Warmup Problem
ACC
0
27.8%
466
Another Contest 4 Problem 5 - Prime Time Television
ACC
0
62.6%
158
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