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European Championship 2025 - Online Mirror (Unrated, ICPC Rules, Teams Preferred)
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combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Problems
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Status
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Custom test
Problems
#
Name
1017A
The Rank
implementation
800
x20789
1016A
Death Note
greedy
,
implementation
,
math
900
x15061
1015A
Points in Segments
implementation
800
x21317
1013A
Piles With Stones
math
800
x11116
1011A
Stages
greedy
,
implementation
,
sortings
900
x12418
1009A
Game Shopping
implementation
800
x11907
1008A
Romaji
implementation
,
strings
900
x15466
1006A
Adjacent Replacements
implementation
800
x21882
1005B
Delete from the Left
brute force
,
implementation
,
strings
900
x24486
1005A
Tanya and Stairways
implementation
800
x24326
1004A
Sonya and Hotels
implementation
900
x11473
1003A
Polycarp's Pockets
implementation
800
x27754
1002A1
Generate superposition of all basis states
*special problem
800
x864
999B
Reversing Encryption
implementation
900
x18165
999A
Mishka and Contest
brute force
,
implementation
800
x23732
996A
Hit the Lottery
dp
,
greedy
800
x97206
994A
Fingerprints
implementation
800
x14397
992A
Nastya and an Array
implementation
,
sortings
800
x13447
991B
Getting an A
greedy
,
sortings
900
x12857
989A
A Blend of Springtime
implementation
,
strings
900
x10615
988A
Diverse Team
brute force
,
implementation
800
x25984
987A
Infinity Gauntlet
implementation
800
x16873
984A
Game
sortings
800
x19751
981A
Antipalindrome
brute force
,
implementation
,
strings
900
x9675
980A
Links and Pearls
implementation
,
math
900
x10525
978B
File Name
greedy
,
strings
800
x37579
978A
Remove Duplicates
implementation
800
x27981
977B
Two-gram
implementation
,
strings
900
x41960
977A
Wrong Subtraction
implementation
800
x180944
976A
Minimum Binary Number
implementation
800
x10620
975A
Aramic script
implementation
,
strings
900
x9485
965A
Paper Airplanes
math
800
x9773
964A
Splits
math
800
x9806
961A
Tetris
implementation
900
x10228
959A
Mahmoud and Ehab and the even-odd game
games
,
math
800
x49521
954A
Diagonal Walking
implementation
800
x10672
952A
Quirky Quantifiers
math
800
x11454
950A
Left-handers, Right-handers and Ambidexters
implementation
,
math
800
x15571
948A
Protect Sheep
brute force
,
dfs and similar
,
graphs
,
implementation
900
x14170
946A
Partition
greedy
800
x16908
939A
Love Triangle
graphs
800
x26274
938A
Word Correction
implementation
800
x11599
937A
Olympiad
implementation
,
sortings
800
x15428
935B
Fafa and the Gates
implementation
900
x11802
935A
Fafa and his Company
brute force
,
implementation
800
x44274
932A
Palindromic Supersequence
constructive algorithms
800
x10397
931A
Friends Meeting
brute force
,
greedy
,
implementation
,
math
800
x12405
919A
Supermarket
brute force
,
greedy
,
implementation
800
x16288
918B
Radio Station
implementation
,
strings
900
x17333
918A
Eleven
brute force
,
implementation
800
x17428
916A
Jamie and Alarm Snooze
brute force
,
implementation
,
math
900
x8714
915A
Garden
implementation
900
x15095
914A
Perfect Squares
brute force
,
implementation
,
math
900
x14445
913A
Modular Exponentiation
implementation
,
math
900
x21772
912A
Tricky Alchemy
implementation
800
x13636
910A
The Way to Home
dfs and similar
,
dp
,
greedy
,
implementation
800
x12423
908A
New Year and Counting Cards
brute force
,
implementation
800
x14948
903A
Hungry Student Problem
greedy
,
implementation
900
x14837
900A
Find Extra One
geometry
,
implementation
800
x13821
899A
Splitting in Teams
constructive algorithms
,
greedy
,
math
800
x10377
898A
Rounding
implementation
,
math
800
x16582
897A
Scarborough Fair
implementation
800
x14467
894A
QAQ
brute force
,
dp
800
x35869
893A
Chess For Three
implementation
900
x10411
892A
Greed
greedy
,
implementation
900
x13863
888A
Local Extrema
brute force
,
implementation
800
x11214
884A
Book Reading
implementation
800
x10601
879A
Borya's Diagnosis
implementation
900
x9164
876A
Trip For Meal
math
900
x9499
873A
Chores
implementation
800
x8469
870A
Search for Pretty Integers
brute force
,
implementation
900
x10295
868A
Bark to Unlock
brute force
,
implementation
,
strings
900
x9114
867A
Between the Offices
implementation
800
x19625
863A
Quasi-palindrome
brute force
,
implementation
900
x10386
859A
Declined Finalists
greedy
,
implementation
800
x7847
855A
Tom Riddle's Diary
brute force
,
implementation
,
strings
800
x22849
854A
Fraction
brute force
,
constructive algorithms
,
math
800
x13820
851A
Arpa and a research in Mexican wave
implementation
,
math
800
x9900
847G
University Classes
implementation
900
x7009
841A
Generous Kefa
brute force
,
implementation
900
x13386
839A
Arya and Bran
implementation
900
x14328
837A
Text Volume
implementation
800
x9604
835A
Key races
math
800
x20606
834A
The Useless Toy
implementation
900
x8777
832A
Sasha and Sticks
games
,
math
800
x21142
831B
Keyboard Layouts
implementation
,
strings
800
x14762
822A
I'm bored with life
implementation
,
math
,
number theory
800
x34026
821A
Okabe and Future Gadget Laboratory
implementation
800
x8372
820A
Mister B and Book Reading
implementation
900
x8254
818A
Diplomas and Certificates
implementation
,
math
800
x7136
814A
An abandoned sentiment from past
constructive algorithms
,
greedy
,
implementation
,
sortings
900
x10679
811A
Vladik and Courtesy
brute force
,
implementation
800
x12021
810A
Straight <<A>>
implementation
,
math
900
x8916
808A
Lucky Year
implementation
900
x9642
807A
Is it rated?
implementation
,
sortings
900
x21377
802G
Fake News (easy)
implementation
,
strings
800
x7284
801B
Valued Keys
constructive algorithms
,
greedy
,
strings
900
x10553
796A
Buying A House
brute force
,
implementation
800
x13238
794A
Bank Robbery
brute force
,
implementation
800
x7201
793A
Oleg and shares
implementation
,
math
900
x7089
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