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Random
Hot problems
CCC '24 S2 - Heavy-Light Composition
APIO '09 P3 - The Great ATM Robbery
COCI '11 Contest 5 #2 Eko
String Finding
ICPC PACNW 2016 A - Alphabet
Appleby Contest '19 P5 - Matrix Operation
CCO '07 P2 - Snowflakes
Problem
Category
Points
AC % ▾
Users
WC '18 Contest 3 J2 - Net Weight
Woburn Challenge
5p
45.9%
257
COCI '17 Contest 3 #2 Programiranje
COCI
7p
45.9%
37
CCC '16 J3 - Hidden Palindrome
CCC
5
45.9%
2551
ACSL '09 Practice P4 - Rank
Uncategorized
7
45.9%
850
Another Contest 4 Problem 4 - Another Isosceles Right Triangle
ACC
0
45.8%
118
DMOPC '13 Contest 3 P5 - A Romantic Dinner
DMOPC
10p
45.8%
388
CCC '13 S1 - From 1987 to 2013
CCC
5
45.8%
3922
ECOO '20 P1 - Music with Mimi
ECOO
3p
45.7%
188
CCC '20 J4 - Cyclic Shifts
CCC
5p
45.7%
2283
COCI '06 Contest 3 #2 N-puzzle
COCI
5
45.7%
408
DWITE '11 R4 #3 - Breaking Bonds
DWITE
7
45.7%
20
An Extraordinarily Coordinated Christmas
Uncategorized
10p
45.7%
104
Valentine's Day '18 S4 - Coastal California Cities
Mock CCC
7p
45.6%
43
COCI '06 Contest 2 #2 ABC
COCI
3
45.6%
867
DMOPC '16 Contest 2 P1 - Seed Strategy
DMOPC
3
45.6%
335
CCC '12 S5 - Mouse Journey
CCC
7
45.6%
1816
K-th Minimum Number
Uncategorized
17
45.5%
32
COCI '06 Contest 2 #5 Stol
COCI
12p
45.5%
383
CTU Open Contest 2018 - Escalators
ICPC
15
45.5%
8
WC '98 P2 - The Hutts Strike Back
Woburn Challenge
10
45.5%
8
Counting Problem
Uncategorized
17
45.5%
5
Cheerio Contest 1 J3 - Festival
Uncategorized
5
45.4%
187
ICPC NAQ 2016 C - Big Truck
ICPC
10
45.4%
73
UHCC1 P2 - String
Uncategorized
5
45.4%
106
TSOC '16 Contest 1 #1 - Vasile and Haircuts
TSOC
3
45.4%
433
COCI '07 Contest 6 #2 Semafori
COCI
7
45.4%
317
HCI '16 - Oversleep
Uncategorized
7p
45.3%
528
COCI '08 Contest 2 #2 Reseto
COCI
5
45.3%
303
IOI '95 P1 - Packing Rectangles
IOI
15p
45.3%
26
XOR Sum
Uncategorized
10
45.3%
234
NOI '17 P2 - Queue
China NOI
20p
45.3%
9
GFSSOC '15 Fall Practice P3 - Bruno and Beads
GFSSOC
5p
45.3%
133
DMOPC '19 Contest 7 P1 - Hydrocarbons
DMOPC
7
45.3%
264
Lyndon's Golf Contest 1 P1 - As Easy As ABC
Uncategorized
0p
45.2%
176
DMOPC '18 Contest 3 P1 - Bob and Music Class
DMOPC
5
45.2%
101
Cheerio Contest 1 S1/J4 - Going to School
Uncategorized
5p
45.2%
142
CEOI '22 P2 - Homework
CEOI
15p
45.2%
70
COCI '07 Contest 3 #1 Cetiri
COCI
3
45.1%
436
BSSPC '22 P2 - Rhyming Numbers
Uncategorized
3
45.1%
403
COCI '09 Contest 1 #3 Dobra
COCI
7
45.1%
113
IOI '16 P2 - Roller Coaster Railroad
IOI
35p
45.1%
35
CCC '13 J2 - Rotating letters
CCC
3
45.0%
4833
ECOO '13 R2 P3 - Last Robot Standing
ECOO
7p
45.0%
7
COCI '13 Contest 4 #6 Utrka
COCI
20p
45.0%
4
DMOPC '18 Contest 6 P3 - Wish Upon a Star
DMOPC
10p
45.0%
386
VPEX P1 - War on Two Fronts
Uncategorized
3p
45.0%
349
Creating a Sequence
Uncategorized
3p
45.0%
99
IOI '07 P2 - Flood
IOI
25p
45.0%
135
DMPG '18 B1 - Pizza Orders
DMOPC
3
45.0%
556
Mock CCC '18 Contest 1 J1 - A String Problem
Mock CCC
3p
45.0%
497
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