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Random
Hot problems
CCC '24 J3 - Bronze Count
Educational DP Contest AtCoder A - Frog 1
Knapsack 4
COCI '10 Contest 4 #2 Parket
Baltic OI '05 P3 - Maze
CCC '00 S1 - Slot Machines
WC '99 P3 - The Godfather
Problem
Category
Points
AC %
Users ▾
TLE '16 Contest 1 P1 - Buying Paper
TLE
3p
26.2%
123
COCI '07 Contest 5 #3 Jabuke
COCI
7
45.1%
123
WC '95 P5 - Factorial Power
Woburn Challenge
5
27.9%
123
COCI '20 Contest 5 #2 Po
COCI
7p
29.9%
123
An Animal Contest 6 P2 - G-Pop
AAC
7p
10.7%
123
A Times B
Uncategorized
20p
15.8%
122
Mock CCC '18 Contest 1 J5/S3 - A Simulation Problem
Mock CCC
7p
21.6%
122
Mock CCC '18 Contest 2 J4/S2 - A Geometry Problem
Mock CCC
7p
17.5%
122
COCI '17 Contest 1 #3 Lozinke
COCI
5
22.8%
122
WC '15 Contest 2 S1 - The Phantom Menace
Woburn Challenge
7
46.8%
122
DMOPC '22 Contest 2 P3 - Good Permutations
DMOPC
12p
20.0%
122
The Cosmic Era P5 - GENESIS
Uncategorized
20
34.2%
121
COCI '06 Contest 1 #6 Debug
COCI
20p
14.4%
121
ICPC ECNA 2005 B - Countdown
ICPC
10
21.9%
121
TLE '17 Contest 5 P2 - Delivery Service II
TLE
5p
24.2%
121
DMOPC '19 Contest 4 P2 - Pleasant Present
DMOPC
10p
18.0%
121
IOI '94 P4 - The Clocks
IOI
10
27.2%
121
WC '96 P3 - Hidden Geography
Woburn Challenge
5
32.0%
121
UTS Open '21 P2 - Prime Array
Uncategorized
10
27.0%
121
COCI '16 Contest 3 #1 Imena
COCI
3p
23.4%
121
Fair Competition
Olympiads School
5
32.7%
121
COCI '14 Contest 2 #4 Bob
COCI
20p
29.3%
120
TLE '15 P4 - Olympiads Homework
TLE
12p
17.0%
120
MWC '15 #4 P3: Salt
MWC
5p
28.0%
120
MWC '15 #5 P3: French Words
MWC
5p
30.3%
120
Back From Summer '17 P6: Crowded Cities
Seasonal
20p
11.9%
120
Valentine's Day '18 J2 - Stop the Scammer
Mock CCC
5p
31.2%
120
DMOPC '18 Contest 3 P4 - Bob and English Class
DMOPC
15p
33.5%
120
DMOPC '19 Contest 3 P4 - Same Colour Leaves
DMOPC
15
33.5%
120
DMOPC '19 Contest 5 P3 - Captivating Construction Challenge
DMOPC
12p
44.9%
120
NOI '00 P4 - Trie
China NOI
7
50.3%
120
MALD Contest 1 P2 - Scratch Cat and Examinations
Uncategorized
5p
30.7%
120
HHPC1 P2 - Yuniformity Challenge
Uncategorized
10p
12.6%
120
DMOPC '14 Contest 5 P4 - Kittan's Dilemma
DMOPC
10p
12.0%
119
DMOPC '15 Contest 7 P1 - Kemonomimi Competition
DMOPC
7p
21.7%
119
COCI '13 Contest 1 #1 Trener
COCI
5p
50.2%
119
Favorite Numbers
Uncategorized
5
27.7%
119
Bubble Cup V8 D Tablecity
Bubble Cup
10
39.1%
119
DMOPC '17 Contest 4 P2 - A Heavy Light Decomposition Problem
DMOPC
7p
12.3%
119
DMOPC '19 Contest 6 P3 - Grade 11 Math
DMOPC
10p
14.4%
119
DMOPC '19 Contest 6 P4 - Grade 12 Math
DMOPC
15p
23.4%
119
WC '17 Contest 1 J4 - Canuck Detection
Woburn Challenge
5p
38.1%
119
COCI '20 Contest 1 #1 Patkice
COCI
5p
25.2%
119
DMOPC '17 Contest 1 P5 - Intimidating Arrays
DMOPC
15p
33.0%
118
DWITE '09 R6 #5 - Air Travel Planning
DWITE
7
61.0%
118
WC '18 Contest 1 S3 - Reach for the Top
Woburn Challenge
12p
11.7%
118
Diagnostic Test '16 Level 2 P1 - Polan cannot into space
Uncategorized
3
48.8%
118
Wesley's Anger Contest 6 Problem 3 - Difference Sorting
WAC
10p
16.2%
118
DMOPC '20 Contest 6 P2 - Interpretive Art
DMOPC
7p
11.6%
118
SAC '22 Code Challenge 5 P4 - Querying Intervals
SAC Coding Challenge
10p
35.9%
118
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