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→ Filter Problems
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implementation
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
994B
Knights of a Polygonal Table
greedy
,
implementation
,
sortings
1400
x5738
994A
Fingerprints
implementation
800
x14224
993A
Two Squares
geometry
,
implementation
1600
x4162
992D
Nastya and a Game
brute force
,
implementation
,
math
2100
x1655
992A
Nastya and an Array
implementation
,
sortings
800
x13197
991F
Concise and clear
brute force
,
greedy
,
implementation
,
math
2700
x310
991C
Candies
binary search
,
implementation
1500
x10536
991A
If at first you don't succeed...
implementation
1000
x10649
990D
Graph And Its Complement
constructive algorithms
,
graphs
,
implementation
1700
x3850
990C
Bracket Sequences Concatenation Problem
implementation
1500
x5934
990A
Commentary Boxes
implementation
,
math
1000
x10630
989A
A Blend of Springtime
implementation
,
strings
900
x10391
988C
Equal Sums
implementation
,
sortings
1400
x10274
988A
Diverse Team
brute force
,
implementation
800
x25263
987C
Three displays
brute force
,
dp
,
implementation
1400
x13620
987A
Infinity Gauntlet
implementation
800
x16643
985B
Switches and Lamps
implementation
1200
x7409
985A
Chess Placing
implementation
1100
x8172
984B
Minesweeper
implementation
1100
x7389
983A
Finite or not?
implementation
,
math
1700
x4556
982B
Bus of Characters
data structures
,
greedy
,
implementation
1300
x8320
981C
Useful Decomposition
implementation
,
trees
1400
x5497
981A
Antipalindrome
brute force
,
implementation
,
strings
900
x9435
980A
Links and Pearls
implementation
,
math
900
x10444
978G
Petya's Exams
greedy
,
implementation
,
sortings
1700
x4397
978F
Mentors
binary search
,
data structures
,
implementation
1500
x8361
978D
Almost Arithmetic Progression
brute force
,
implementation
,
math
1500
x8857
978C
Letters
binary search
,
implementation
,
two pointers
1000
x25954
978A
Remove Duplicates
implementation
800
x27377
977B
Two-gram
implementation
,
strings
900
x40143
977A
Wrong Subtraction
implementation
800
x171415
976D
Degree Set
constructive algorithms
,
graphs
,
implementation
2500
x688
976C
Nested Segments
greedy
,
implementation
,
sortings
1500
x7011
976B
Lara Croft and the New Game
implementation
,
math
1300
x5729
976A
Minimum Binary Number
implementation
800
x10562
975B
Mancala
brute force
,
implementation
1100
x6871
975A
Aramic script
implementation
,
strings
900
x9339
967A
Mind the Gap
implementation
1100
x4376
965B
Battleship
implementation
1300
x4578
962D
Merge Equals
data structures
,
implementation
1600
x6912
962C
Make a Square
brute force
,
implementation
,
math
1400
x7888
962B
Students in Railway Carriage
constructive algorithms
,
greedy
,
implementation
1300
x7719
962A
Equator
implementation
1300
x12844
961C
Chessboard
bitmasks
,
brute force
,
implementation
1400
x5317
961B
Lecture Sleep
data structures
,
dp
,
implementation
,
two pointers
1200
x21243
961A
Tetris
implementation
900
x10085
960D
Full Binary Tree Queries
brute force
,
implementation
,
trees
2100
x1885
960C
Subsequence Counting
bitmasks
,
constructive algorithms
,
greedy
,
implementation
1700
x3935
960A
Check the string
implementation
1200
x8227
959E
Mahmoud and Ehab and the xor-MST
bitmasks
,
dp
,
graphs
,
implementation
,
math
1900
x3444
959B
Mahmoud and Ehab and the message
dsu
,
greedy
,
implementation
1200
x9677
958F1
Lightsabers (easy)
implementation
1500
x1684
958B1
Maximum Control (easy)
implementation
1000
x3447
958A1
Death Stars (easy)
implementation
1400
x1668
957A
Tritonic Iridescence
implementation
1300
x5785
955B
Not simply beatiful strings
implementation
1400
x4840
954C
Matrix Walk
implementation
1700
x3795
954B
String Typing
implementation
,
strings
1400
x7287
954A
Diagonal Walking
implementation
800
x10547
952C
Ravioli Sort
implementation
1600
x2914
950B
Intercepted Message
greedy
,
implementation
1100
x7599
950A
Left-handers, Right-handers and Ambidexters
implementation
,
math
800
x15412
948A
Protect Sheep
brute force
,
dfs and similar
,
graphs
,
implementation
900
x13904
946E
Largest Beautiful Number
greedy
,
implementation
2200
x1104
940D
Alena And The Heater
binary search
,
implementation
1600
x3640
940C
Phone Numbers
constructive algorithms
,
implementation
,
strings
1500
x5903
939B
Hamster Farm
implementation
1000
x10631
938A
Word Correction
implementation
800
x11505
937A
Olympiad
implementation
,
sortings
800
x15263
936C
Lock Puzzle
constructive algorithms
,
implementation
,
strings
2300
x1183
936A
Save Energy!
binary search
,
implementation
,
math
1700
x4372
935B
Fafa and the Gates
implementation
900
x11645
935A
Fafa and his Company
brute force
,
implementation
800
x43423
934B
A Prosperous Lot
constructive algorithms
,
implementation
1200
x8711
931C
Laboratory Work
implementation
,
math
1700
x3364
931B
World Cup
constructive algorithms
,
implementation
1200
x7155
931A
Friends Meeting
brute force
,
greedy
,
implementation
,
math
800
x12237
930D
Game with Tokens
data structures
,
games
,
implementation
2500
x414
930B
Game with String
implementation
,
probabilities
,
strings
1600
x2683
929B
Места в самолёте
*special problem
,
implementation
1300
x2045
929A
Прокат велосипедов
*special problem
,
greedy
,
implementation
1400
x2500
928C
Dependency management
*special problem
,
graphs
,
implementation
1900
x888
926C
Is This a Zebra?
implementation
1700
x1887
926A
2-3-numbers
implementation
,
math
1300
x3815
925B
Resource Distribution
binary search
,
implementation
,
sortings
1700
x2208
924A
Mystical Mosaic
greedy
,
implementation
1300
x5051
923D
Picking Strings
constructive algorithms
,
implementation
,
strings
2500
x1199
922A
Cloning Toys
implementation
1300
x11703
920D
Tanks
dp
,
greedy
,
implementation
2400
x730
920B
Tea Queue
implementation
1200
x7392
920A
Water The Garden
implementation
1000
x7792
919C
Seat Arrangements
brute force
,
implementation
1300
x8996
919B
Perfect Number
binary search
,
brute force
,
dp
,
implementation
,
number theory
1100
x28403
919A
Supermarket
brute force
,
greedy
,
implementation
800
x16159
918B
Radio Station
implementation
,
strings
900
x16911
918A
Eleven
brute force
,
implementation
800
x17132
917A
The Monster
dp
,
greedy
,
implementation
,
math
1800
x3528
916A
Jamie and Alarm Snooze
brute force
,
implementation
,
math
900
x8616
915E
Physical Education Lessons
data structures
,
implementation
,
sortings
2300
x4500
915B
Browser
implementation
1300
x7800
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