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→ Filter Problems
Difficulty:
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math
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
996B
World Cup
binary search
,
math
1300
x9072
995F
Cowmpany Cowmpensation
combinatorics
,
dp
,
math
,
trees
2700
x1267
995D
Game
math
2500
x769
995C
Leaving the Bar
brute force
,
data structures
,
geometry
,
greedy
,
math
,
sortings
2300
x1910
995B
Suit and Tie
greedy
,
implementation
,
math
1400
x7112
993E
Nikita and Order Statistics
chinese remainder theorem
,
fft
,
math
2300
x1437
992D
Nastya and a Game
brute force
,
implementation
,
math
2100
x1655
992C
Nastya and a Wardrobe
math
1600
x4620
992B
Nastya Studies Informatics
math
,
number theory
1600
x6292
991F
Concise and clear
brute force
,
greedy
,
implementation
,
math
2700
x310
991E
Bus Number
brute force
,
combinatorics
,
math
1800
x3509
990A
Commentary Boxes
implementation
,
math
1000
x10630
989D
A Shade of Moonlight
binary search
,
geometry
,
math
,
sortings
,
two pointers
2500
x517
988D
Points and Powers of Two
brute force
,
math
1800
x7350
987B
High School: Become Human
math
1100
x11654
986F
Oppa Funcan Style Remastered
graphs
,
math
,
number theory
,
shortest paths
3300
x642
986E
Prince's Problem
brute force
,
data structures
,
math
,
number theory
,
trees
2800
x799
986D
Perfect Encoding
fft
,
math
3100
x332
986B
Petr and Permutations
combinatorics
,
math
1800
x4688
985D
Sand Fortress
binary search
,
constructive algorithms
,
math
2100
x2568
983A
Finite or not?
implementation
,
math
1700
x4556
981H
K Paths
combinatorics
,
data structures
,
dp
,
fft
,
math
3100
x271
980D
Perfect Groups
dp
,
math
,
number theory
2100
x2726
980A
Links and Pearls
implementation
,
math
900
x10444
979D
Kuro and GCD and XOR and SUM
binary search
,
bitmasks
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
number theory
,
strings
,
trees
2200
x1849
979A
Pizza, Pizza, Pizza!!!
math
1000
x13851
978E
Bus Video System
combinatorics
,
math
1400
x9629
978D
Almost Arithmetic Progression
brute force
,
implementation
,
math
1500
x8857
977D
Divide by three, multiply by two
dfs and similar
,
math
,
sortings
1400
x18512
976B
Lara Croft and the New Game
implementation
,
math
1300
x5729
975D
Ghosts
geometry
,
math
2000
x2224
967B
Watering System
math
,
sortings
1000
x7196
965C
Greedy Arkady
math
2000
x2116
965A
Paper Airplanes
math
800
x9583
964B
Messages
math
1300
x4370
964A
Splits
math
800
x9715
963E
Circles of Waiting
math
3100
x551
963C
Cutting Rectangle
brute force
,
math
,
number theory
2600
x592
963A
Alternating Sum
math
,
number theory
1800
x3334
962C
Make a Square
brute force
,
implementation
,
math
1400
x7888
961G
Partitions
combinatorics
,
math
,
number theory
2700
x1367
960G
Bandit Blues
combinatorics
,
dp
,
fft
,
math
2900
x1073
959F
Mahmoud and Ehab and yet another xor task
bitmasks
,
dp
,
math
,
matrices
2400
x2152
959E
Mahmoud and Ehab and the xor-MST
bitmasks
,
dp
,
graphs
,
implementation
,
math
1900
x3444
959D
Mahmoud and Ehab and another array construction task
constructive algorithms
,
greedy
,
math
,
number theory
1900
x3101
959A
Mahmoud and Ehab and the even-odd game
games
,
math
800
x47914
958E1
Guard Duty (easy)
brute force
,
geometry
,
greedy
,
math
1600
x1544
958D1
Hyperspace Jump (easy)
expression parsing
,
math
1400
x2076
955C
Sad powers
binary search
,
math
,
number theory
2100
x2717
955A
Feed the cat
greedy
,
math
1100
x6677
954I
Yet Another String Matching Problem
fft
,
math
2200
x1032
952A
Quirky Quantifiers
math
800
x11293
950A
Left-handers, Right-handers and Ambidexters
implementation
,
math
800
x15412
949B
A Leapfrog in the Array
constructive algorithms
,
math
1700
x3732
946B
Weird Subtraction Process
math
,
number theory
1100
x10903
940E
Cashback
data structures
,
dp
,
greedy
,
math
2000
x3788
938E
Max History
combinatorics
,
math
2300
x1332
937B
Vile Grasshoppers
brute force
,
math
,
number theory
1400
x6918
936A
Save Energy!
binary search
,
implementation
,
math
1700
x4372
935D
Fafa and Ancient Alphabet
math
,
probabilities
1900
x2641
933D
A Creative Cutout
brute force
,
combinatorics
,
math
2900
x333
933B
A Determined Cleanup
math
2000
x1924
932E
Team Work
combinatorics
,
dp
,
math
2400
x2899
931C
Laboratory Work
implementation
,
math
1700
x3364
931A
Friends Meeting
brute force
,
greedy
,
implementation
,
math
800
x12237
930E
Coins Exhibition
data structures
,
dp
,
math
2900
x437
929C
Красивая команда
*special problem
,
combinatorics
,
math
1700
x1162
926B
Add Points
math
,
number theory
1800
x1715
926A
2-3-numbers
implementation
,
math
1300
x3815
925C
Big Secret
constructive algorithms
,
math
2200
x1321
923E
Perpetual Subtraction
fft
,
math
,
matrices
3100
x455
923A
Primal Sport
math
,
number theory
1700
x5039
920G
List Of Integers
binary search
,
bitmasks
,
brute force
,
combinatorics
,
math
,
number theory
2200
x1761
920C
Swap Adjacent Elements
dfs and similar
,
greedy
,
math
,
sortings
,
two pointers
1400
x9244
919E
Congruence Equation
chinese remainder theorem
,
math
,
number theory
2100
x2142
917D
Stranger Trees
dp
,
math
,
matrices
,
trees
2600
x1162
917A
The Monster
dp
,
greedy
,
implementation
,
math
1800
x3528
916B
Jamie and Binary Sequence (changed after round)
bitmasks
,
greedy
,
math
2000
x1919
916A
Jamie and Alarm Snooze
brute force
,
implementation
,
math
900
x8616
915G
Coprime Arrays
math
,
number theory
2300
x1293
914G
Sum the Fibonacci
bitmasks
,
divide and conquer
,
dp
,
fft
,
math
2600
x936
914A
Perfect Squares
brute force
,
implementation
,
math
900
x14201
913H
Don't Exceed
math
,
probabilities
3400
x127
913G
Power Substring
math
,
number theory
3200
x209
913F
Strongly Connected Tournament
dp
,
graphs
,
math
,
probabilities
2800
x659
913A
Modular Exponentiation
implementation
,
math
900
x21404
912E
Prime Gift
binary search
,
dfs and similar
,
math
,
meet-in-the-middle
,
number theory
,
two pointers
2400
x1631
911D
Inversion Counting
brute force
,
math
1800
x4617
910C
Minimum Sum
constructive algorithms
,
greedy
,
math
1700
x1812
909B
Segments
constructive algorithms
,
math
1300
x6426
908G
New Year and Original Order
dp
,
math
2800
x1376
908E
New Year and Entity Enumeration
bitmasks
,
combinatorics
,
dp
,
math
2500
x760
908D
New Year and Arbitrary Arrangement
dp
,
math
,
probabilities
2200
x2392
908C
New Year and Curling
brute force
,
geometry
,
implementation
,
math
1500
x6935
906D
Power Tower
chinese remainder theorem
,
math
,
number theory
2700
x2144
906B
Seating of Students
brute force
,
constructive algorithms
,
math
2200
x1143
903D
Almost Difference
data structures
,
math
2200
x3889
901E
Cyclic Cipher
fft
,
math
3300
x88
901B
GCD of Polynomials
constructive algorithms
,
math
2200
x1586
900D
Unusual Sequences
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
2000
x3271
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