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Random
Hot problems
Educational DP Contest AtCoder K - Stones
Educational DP Contest AtCoder I - Coins
CCC '21 J3 - Secret Instructions
DMOPC '20 Contest 4 P1 - Missing Numbers
CCC '12 S3 - Absolutely Acidic
DWITE '07 R3 #4 - The Convex Fence Company
CCC '24 J5 - Harvest Waterloo
Problem
Category
Points
AC %
▴
Users
JOI '22 Open P1 - Seesaw
JOI
17p
17.1%
6
Baltic OI '04 P5 - Rectangles
Baltic OI
10p
10.0%
5
JOI '22 Open P2 - Giraffes
JOI
35p
0.0%
0
JOI '22 Open P3 - School Road
JOI
17p
17.9%
6
JOI '21 Spring Camp Day 3 P3 - Meetings 2
JOI
30p
18.6%
8
JOI '21 Spring Camp Day 4 P1 - Event Hopping 2
JOI
30p
64.7%
8
Baltic OI '04 P6 - Car Park
Baltic OI
25p
20.0%
1
DMOPC '22 Contest 1 P1 - Up-down Sequence
DMOPC
5p
24.9%
263
JOI '20 Open P1 - Furniture
JOI
20p
35.0%
7
JOI '20 Open P2 - Monochrome Points
JOI
35p
33.3%
8
JOI '20 Open P3 - Power Plant
JOI
15p
39.8%
23
Bit Combinations
Uncategorized
7
33.3%
16
JOI '19 Open P1 - Triple Jump
JOI
30p
21.0%
13
JOI '19 Open P2 - Remittance
JOI
30p
23.8%
12
JOI '19 Open P3 - Virus Experiment
JOI
35p
5.7%
2
Lemon Tree
Uncategorized
20p
10.5%
14
Baltic OI '03 P3 - Table
Baltic OI
10p
9.1%
2
NOIP '18 Junior P1 - Title Statistics
China NOI
3p
66.7%
52
NOIP '18 Junior P2 - The Big Battle
China NOI
7p
33.3%
13
NOIP '18 Junior P3 - Shuttle Bus
China NOI
12p
16.3%
6
IOI '22 P3 - Radio Towers
IOI
30p
7.2%
15
IOI '22 P1 - Catfish Farm
IOI
25p
8.1%
44
IOI '22 P2 - Prisoner Challenge
IOI
25p
8.2%
25
IOI '22 P6 - Thousands Islands
IOI
30p
3.1%
6
IOI '22 P4 - Digital Circuit
IOI
25p
25.2%
25
IOI '22 P5 - Rarest Insects
IOI
30p
5.0%
21
Magic Bits
Uncategorized
10p
13.1%
40
Purple Lemon
Uncategorized
7p
21.4%
17
NOI '16 P1 - Good Partitions
China NOI
20p
7.8%
5
NOI '16 P2 - Grid
China NOI
25p
7.4%
6
NOI '16 P3 - The Beauty of Cycles
China NOI
30p
3.4%
1
NOI '16 P4 - Interval
China NOI
20p
22.9%
20
NOI '16 P5 - Drinking Water
China NOI
20p
0.7%
1
NOI '16 P6 - Computation
China NOI
30p
1.6%
2
NOI '22 P1 - Major
China NOI
25p
5.6%
12
NOI '22 P2 - Stone
China NOI
30p
25.0%
2
NOI '22 P3 - Count
China NOI
40p
0.0%
0
SGS Programming Challenge P5 - Tree After School
Uncategorized
20p
9.0%
7
NOI '22 P4 - Challenge NPC
China NOI
25p
30.6%
4
NOI '22 P5 - Bubble Sort
China NOI
35p
2.4%
1
NOI '22 P6 - Quadratic Integer Program
China NOI
40p
0.0%
0
SGS Programming Challenge P2 - Vending Machine in Lunch
Uncategorized
10p
12.2%
54
MCIPC Contest 1 P1 - Factoring
Uncategorized
3
25.7%
79
MCIPC Contest 1 P2 - Infinite Chessboard
Uncategorized
3
49.1%
74
MCIPC Contest 1 P1 - Cypher
Uncategorized
5p
37.9%
49
MCIPC Contest 1 P5 - Rainwater
Uncategorized
7
20.7%
17
MCIPC Contest 1 P4 - Snack Line
Uncategorized
7p
14.5%
14
Cheerio Contest 2 P5 - Subsequence Queries
Uncategorized
7p
26.5%
23
Cheerio Contest 2 P4 - Modulus Finding
Uncategorized
7p
14.5%
18
Cheerio Contest 2 P1 - Cow Pasture
Uncategorized
3p
36.1%
41
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