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Random
Hot problems
COCI '08 Contest 4 #6 Periodni
CCC '24 J4 - Troublesome Keys
CCC '24 S2 - Heavy-Light Composition
APIO '09 P1 - Digging for Oil
CCC '19 J3 - Cold Compress
COCI '22 Contest 4 #1 7Krokods
CCC '24 J5 - Harvest Waterloo
Problem
Category ▴
Points
AC %
Users
CCO '08 P2 - King & Weber
CCO
10p
17.8%
68
CCO '03 P6 - Cheap Gas
CCO
20p
13.1%
79
CCO '21 P1 - Swap Swap Sort
CCO
17p
17.6%
150
CCO '21 P2 - Weird Numeral System
CCO
17p
12.2%
83
CCO '21 P3 - Through Another Maze Darkly
CCO
25p
20.3%
48
CCO '21 P4 - Travelling Merchant
CCO
25p
19.8%
50
CCO '21 P5 - Bread First Search
CCO
20p
23.0%
62
CCO '21 P6 - Loop Town
CCO
50p
4.7%
13
CCO '01 P4 - Breaking Level (Standard I/O)
CCO
12
7.8%
35
CCO '05 P3 - That's News To Me
CCO
20
0.0%
0
CCO '22 P1 - Alternating Heights
CCO
12p
27.2%
131
CCO '22 P2 - Rainy Markets
CCO
17p
18.4%
99
CCO '22 P3 - Double Attendance
CCO
25p
7.4%
27
CCO '22 P4 - Bi-ing Lottery Treekets
CCO
20p
22.4%
28
CCO '22 P5 - Phone Plans
CCO
20p
12.1%
30
CCO '22 P6 - Good Game
CCO
35p
19.6%
12
CCO '23 P1 - Binaria
CCO
12p
23.8%
161
CCO '23 P3 - Line Town
CCO
30p
10.7%
21
CCO '23 P2 - Real Mountains
CCO
17p
14.1%
62
CCO '23 P4 - Flip it and Stick it
CCO
17p
7.0%
48
CCO '23 P5 - Travelling Trader
CCO
30p
7.0%
14
CCO '23 P6 - Triangle Collection
CCO
25p
16.2%
17
DMPG '16 B3 - CCO
DMOPC
5
41.8%
102
CCO Preparation Test 1 P1 - Double Cross
Mock CCO
20p
12.1%
10
CCO Preparation Test 1 P2 - Escape Maze
Mock CCO
20p
12.0%
39
CCO Preparation Test 1 P3 - K-th Rank Student
Mock CCO
17p
35.4%
149
CCO Preparation Test 2 P1 - Concatenation
Mock CCO
17p
13.1%
32
CCO Preparation Test 2 P2 - Forest Area
Mock CCO
25p
3.8%
5
CCO Preparation Test 2 P3 - Subsets
Mock CCO
20p
16.7%
39
CCO Preparation Test 3 P1 - Primitive Pythagorean Pairs
Mock CCO
25p
13.7%
20
CCO Preparation Test 3 P2 - Packing Up
Mock CCO
25p
14.9%
117
CCO Preparation Test 3 P3 - Arrow
Mock CCO
30p
18.0%
57
CCO Preparation Test 4 P3 - Dynamic MST
Mock CCO
25p
22.4%
49
CCO Preparation Test 5 P1 - City Game
Mock CCO
15
26.4%
202
CCO Preparation Test 5 P2 - Corporative Network
Mock CCO
15
7.0%
13
CCO Preparation Test 5 P3 - Minimum Cycle
Mock CCO
15p
9.4%
9
CCO Preparation Test 5 P4 - Toys
Mock CCO
15p
3.1%
2
CCO Preparation Test 6 P1 - Bus Routes
Mock CCO
20p
24.2%
6
CCO Preparation Test 6 P2 - An Easy Problem
Mock CCO
12p
33.0%
205
CCO Preparation Test 6 P3 - HopScotch
Mock CCO
20p
23.1%
140
CCO Preparation Test 7 P1 - Game of Stone
Mock CCO
20p
6.4%
3
CCO Preparation Test 7 P2 - XOR Path
Mock CCO
20p
13.5%
16
Mock CCO '17 Problem 1 - Fast Fuhrer Transform
Mock CCO
10p
25.4%
60
Mock CCO '17 Problem 2 - Penetrating Power
Mock CCO
17p
25.5%
168
Mock CCO '17 Problem 3 - Connection
Mock CCO
20p
12.5%
38
Mock CCO '17 Problem 4 - Guards
Mock CCO
15p
17.2%
52
Mock CCO '17 Problem 5 - Blitzkrieg
Mock CCO
17p
12.4%
13
Mock CCO '17 Problem 6 - Dire Consequences
Mock CCO
20
24.2%
25
Mock CCO '18 Contest 1 Problem 4 - A Rectangle Problem
Mock CCO
25p
17.4%
7
Mock CCO '18 Contest 1 Problem 5 - A Counting Problem
Mock CCO
20p
24.5%
9
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