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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
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shortest paths
sortings
string suffix structures
strings
ternary search
trees
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Problems
#
Name
978A
Remove Duplicates
implementation
800
x27377
977B
Two-gram
implementation
,
strings
900
x40138
977A
Wrong Subtraction
implementation
800
x171403
976A
Minimum Binary Number
implementation
800
x10562
975A
Aramic script
implementation
,
strings
900
x9338
967B
Watering System
math
,
sortings
1000
x7195
965A
Paper Airplanes
math
800
x9583
964A
Splits
math
800
x9715
961A
Tetris
implementation
900
x10085
959A
Mahmoud and Ehab and the even-odd game
games
,
math
800
x47914
958B1
Maximum Control (easy)
implementation
1000
x3447
954A
Diagonal Walking
implementation
800
x10547
952A
Quirky Quantifiers
math
800
x11293
950A
Left-handers, Right-handers and Ambidexters
implementation
,
math
800
x15412
948A
Protect Sheep
brute force
,
dfs and similar
,
graphs
,
implementation
900
x13904
946A
Partition
greedy
800
x16602
939B
Hamster Farm
implementation
1000
x10631
939A
Love Triangle
graphs
800
x25524
938A
Word Correction
implementation
800
x11505
937A
Olympiad
implementation
,
sortings
800
x15263
935B
Fafa and the Gates
implementation
900
x11645
935A
Fafa and his Company
brute force
,
implementation
800
x43423
932A
Palindromic Supersequence
constructive algorithms
800
x10312
931A
Friends Meeting
brute force
,
greedy
,
implementation
,
math
800
x12237
920A
Water The Garden
implementation
1000
x7792
919A
Supermarket
brute force
,
greedy
,
implementation
800
x16158
918B
Radio Station
implementation
,
strings
900
x16909
918A
Eleven
brute force
,
implementation
800
x17130
916A
Jamie and Alarm Snooze
brute force
,
implementation
,
math
900
x8616
915A
Garden
implementation
900
x14820
914A
Perfect Squares
brute force
,
implementation
,
math
900
x14201
913A
Modular Exponentiation
implementation
,
math
900
x21403
912A
Tricky Alchemy
implementation
800
x13539
910A
The Way to Home
dfs and similar
,
dp
,
greedy
,
implementation
800
x12122
909A
Generate Login
brute force
,
greedy
,
sortings
1000
x9340
908A
New Year and Counting Cards
brute force
,
implementation
800
x14831
903A
Hungry Student Problem
greedy
,
implementation
900
x14659
900A
Find Extra One
geometry
,
implementation
800
x13670
899A
Splitting in Teams
constructive algorithms
,
greedy
,
math
800
x10265
898A
Rounding
implementation
,
math
800
x16296
897A
Scarborough Fair
implementation
800
x14295
894A
QAQ
brute force
,
dp
800
x35025
893B
Beautiful Divisors
brute force
,
implementation
1000
x11495
893A
Chess For Three
implementation
900
x10278
892A
Greed
greedy
,
implementation
900
x13613
888B
Buggy Robot
greedy
1000
x9806
888A
Local Extrema
brute force
,
implementation
800
x11054
887A
Div. 64
implementation
1000
x11293
886B
Vlad and Cafes
1000
x7930
886A
ACM ICPC
brute force
1000
x10347
884A
Book Reading
implementation
800
x10507
879A
Borya's Diagnosis
implementation
900
x9095
876A
Trip For Meal
math
900
x9404
873A
Chores
implementation
800
x8336
870A
Search for Pretty Integers
brute force
,
implementation
900
x10211
868A
Bark to Unlock
brute force
,
implementation
,
strings
900
x8723
867A
Between the Offices
implementation
800
x19380
864B
Polycarp and Letters
brute force
,
implementation
,
strings
1000
x9169
864A
Fair Game
implementation
,
sortings
1000
x11679
863A
Quasi-palindrome
brute force
,
implementation
900
x10259
862A
Mahmoud and Ehab and the MEX
greedy
,
implementation
1000
x9564
859B
Lazy Security Guard
brute force
,
geometry
,
math
1000
x7066
859A
Declined Finalists
greedy
,
implementation
800
x7788
855A
Tom Riddle's Diary
brute force
,
implementation
,
strings
800
x22078
854A
Fraction
brute force
,
constructive algorithms
,
math
800
x13678
851A
Arpa and a research in Mexican wave
implementation
,
math
800
x9793
849A
Odds and Ends
implementation
1000
x9110
847M
Weather Tomorrow
implementation
,
math
1000
x6309
847G
University Classes
implementation
900
x6851
844A
Diversity
greedy
,
implementation
,
strings
1000
x11026
841A
Generous Kefa
brute force
,
implementation
900
x13252
839A
Arya and Bran
implementation
900
x14209
837A
Text Volume
implementation
800
x9484
835A
Key races
math
800
x20346
834A
The Useless Toy
implementation
900
x8693
832A
Sasha and Sticks
games
,
math
800
x20868
831B
Keyboard Layouts
implementation
,
strings
800
x14527
831A
Unimodal Array
implementation
1000
x10307
822B
Crossword solving
brute force
,
implementation
,
strings
1000
x9549
822A
I'm bored with life
implementation
,
math
,
number theory
800
x33424
821A
Okabe and Future Gadget Laboratory
implementation
800
x8318
820A
Mister B and Book Reading
implementation
900
x8183
818A
Diplomas and Certificates
implementation
,
math
800
x7027
816A
Karen and Morning
brute force
,
implementation
1000
x9150
814A
An abandoned sentiment from past
constructive algorithms
,
greedy
,
implementation
,
sortings
900
x10447
811A
Vladik and Courtesy
brute force
,
implementation
800
x11932
810A
Straight <<A>>
implementation
,
math
900
x8852
808A
Lucky Year
implementation
900
x9382
807A
Is it rated?
implementation
,
sortings
900
x20847
805B
3-palindrome
constructive algorithms
1000
x17030
805A
Fake NP
greedy
,
math
1000
x18095
804A
Find Amir
constructive algorithms
,
greedy
,
math
1000
x15520
802G
Fake News (easy)
implementation
,
strings
800
x7072
801B
Valued Keys
constructive algorithms
,
greedy
,
strings
900
x10394
798A
Mike and palindrome
brute force
,
constructive algorithms
,
strings
1000
x21881
796A
Buying A House
brute force
,
implementation
800
x13071
794A
Bank Robbery
brute force
,
implementation
800
x7105
793A
Oleg and shares
implementation
,
math
900
x6852
791A
Bear and Big Brother
implementation
800
x199301
785A
Anton and Polyhedrons
implementation
,
strings
800
x90446
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