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Contest is running
Codeforces Round 937 (Div. 4)
00:47:29
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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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Status
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Custom test
Problems
#
Name
915B
Browser
implementation
1300
x7628
1284C
New Year and Permutation
combinatorics
,
math
1600
x7623
303A
Lucky Permutation Triple
constructive algorithms
,
implementation
,
math
1300
x7618
558B
Amr and The Large Array
implementation
1300
x7612
617E
XOR and Favorite Number
data structures
2200
x7608
1165E
Two Arrays and Sum of Functions
greedy
,
math
,
sortings
1600
x7601
900B
Position in Fraction
math
,
number theory
1300
x7598
1740D
Knowledge Cards
constructive algorithms
,
data structures
1500
x7592
1157C2
Increasing Subsequence (hard version)
greedy
1700
x7592
835C
Star sky
dp
,
implementation
1600
x7591
1560E
Polycarp and String Transformation
binary search
,
implementation
,
sortings
,
strings
1800
x7589
845A
Chess Tourney
implementation
,
sortings
1100
x7589
358A
Dima and Continuous Line
brute force
,
implementation
1400
x7585
686B
Little Robber Girl's Zoo
constructive algorithms
,
implementation
,
sortings
1100
x7583
416C
Booking System
binary search
,
dp
,
greedy
,
implementation
1600
x7571
962B
Students in Railway Carriage
constructive algorithms
,
greedy
,
implementation
1300
x7570
1849D
Array Painting
constructive algorithms
,
greedy
,
two pointers
1700
x7560
908B
New Year and Buggy Bot
brute force
,
implementation
1200
x7560
920A
Water The Garden
implementation
1000
x7559
859A
Declined Finalists
greedy
,
implementation
800
x7553
1340B
Nastya and Scoreboard
bitmasks
,
dp
,
graphs
,
greedy
1700
x7551
574B
Bear and Three Musketeers
brute force
,
dfs and similar
,
graphs
,
hashing
1500
x7551
739A
Alyona and mex
constructive algorithms
,
greedy
1700
x7543
496C
Removing Columns
brute force
,
constructive algorithms
,
implementation
1500
x7536
1777C
Quiz Master
binary search
,
math
,
number theory
,
sortings
,
two pointers
1700
x7534
474F
Ant colony
data structures
,
math
,
number theory
2100
x7529
1278C
Berry Jam
data structures
,
dp
,
greedy
,
implementation
1700
x7526
150A
Win or Freeze
games
,
math
,
number theory
1400
x7524
1778C
Flexible String
bitmasks
,
brute force
,
strings
1600
x7518
903B
The Modcrab
greedy
,
implementation
1200
x7512
479B
Towers
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x7512
825A
Binary Protocol
implementation
1100
x7507
603A
Alternative Thinking
dp
,
greedy
,
math
1600
x7503
1096D
Easy Problem
dp
1800
x7498
1065C
Make It Equal
greedy
1600
x7494
888D
Almost Identity Permutations
combinatorics
,
dp
,
math
1600
x7493
1409E
Two Platforms
binary search
,
dp
,
sortings
,
two pointers
1800
x7491
582A
GCD Table
constructive algorithms
,
greedy
,
number theory
1700
x7490
1101C
Division and Union
sortings
1500
x7478
1592C
Bakry and Partitioning
bitmasks
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
trees
1700
x7475
1136C
Nastya Is Transposing Matrices
constructive algorithms
,
sortings
1500
x7470
208D
Prizes, Prizes, more Prizes
implementation
1200
x7469
342E
Xenia and Tree
data structures
,
divide and conquer
,
trees
2400
x7467
1527B2
Palindrome Game (hard version)
constructive algorithms
,
games
1900
x7465
1446B
Catching Cheaters
dp
,
strings
1800
x7462
1365E
Maximum Subsequence Value
brute force
,
constructive algorithms
1900
x7454
1003D
Coins and Queries
greedy
1600
x7452
863B
Kayaking
brute force
,
greedy
,
sortings
1500
x7452
1013B
And
greedy
1200
x7438
612C
Replace To Make Regular Bracket Sequence
data structures
,
expression parsing
,
math
1400
x7437
596A
Wilbur and Swimming Pool
geometry
,
implementation
1100
x7435
1535D
Playoff Tournament
data structures
,
dfs and similar
,
dp
,
implementation
,
trees
1800
x7430
1064B
Equations of Mathematical Magic
math
1200
x7421
1084C
The Fair Nut and String
combinatorics
,
dp
,
implementation
1500
x7417
1543D1
RPD and Rap Sheet (Easy Version)
bitmasks
,
constructive algorithms
,
interactive
,
math
1700
x7401
1852A
Ntarsis' Set
binary search
,
math
,
number theory
1800
x7391
1004C
Sonya and Robots
constructive algorithms
,
implementation
1400
x7391
292B
Network Topology
graphs
,
implementation
1200
x7391
614A
Link/Cut Tree
brute force
,
implementation
1500
x7386
1082B
Vova and Trophies
greedy
1600
x7385
1840E
Character Blocking
data structures
,
hashing
,
implementation
1600
x7379
157A
Game Outcome
brute force
800
x7377
1779D
Boris and His Amazing Haircut
constructive algorithms
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1700
x7372
677B
Vanya and Food Processor
implementation
,
math
1400
x7372
135A
Replacement
greedy
,
implementation
,
sortings
1300
x7372
340A
The Wall
math
1200
x7367
106A
Card Game
implementation
1000
x7366
873B
Balanced Substring
dp
,
implementation
1500
x7362
472B
Design Tutorial: Learn from Life
1300
x7358
1244C
The Football Season
brute force
,
math
,
number theory
2000
x7356
762B
USB vs. PS/2
greedy
,
implementation
,
sortings
,
two pointers
1400
x7356
699B
One Bomb
implementation
1400
x7353
1468C
Berpizza
data structures
,
implementation
1400
x7348
515B
Drazil and His Happy Friends
brute force
,
dsu
,
meet-in-the-middle
,
number theory
1300
x7344
1360G
A/B Matrix
constructive algorithms
,
greedy
,
math
1900
x7343
587A
Duff and Weight Lifting
greedy
1500
x7336
318B
Strings of Power
implementation
,
strings
,
two pointers
1300
x7334
1878D
Reverse Madness
data structures
,
greedy
1600
x7332
1850H
The Third Letter
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
1700
x7317
1283D
Christmas Trees
graphs
,
greedy
,
shortest paths
1800
x7316
1774D
Same Count One
brute force
,
constructive algorithms
,
greedy
,
implementation
,
two pointers
1600
x7304
735C
Tennis Championship
combinatorics
,
constructive algorithms
,
greedy
,
math
1600
x7303
1225D
Power Products
hashing
,
math
,
number theory
1800
x7299
1835A
k-th equality
brute force
,
implementation
,
math
1700
x7296
424B
Megacity
binary search
,
greedy
,
implementation
,
sortings
1200
x7295
471D
MUH and Cube Walls
string suffix structures
,
strings
1800
x7287
985B
Switches and Lamps
implementation
1200
x7286
1941E
Rudolf and k Bridges
binary search
,
data structures
,
dp
,
two pointers
1600
x7279
950B
Intercepted Message
greedy
,
implementation
1100
x7277
1637D
Yet Another Minimization Problem
dp
,
greedy
,
math
1800
x7265
233B
Non-square Equation
binary search
,
brute force
,
math
1400
x7264
1420D
Rescue Nibel!
combinatorics
,
data structures
,
sortings
1800
x7263
1876B
Effects of Anti Pimples
combinatorics
,
number theory
,
sortings
1500
x7259
1187E
Tree Painting
dfs and similar
,
dp
,
trees
2100
x7259
675B
Restoring Painting
brute force
,
constructive algorithms
,
math
1400
x7259
400B
Inna and New Matrix of Candies
brute force
,
implementation
,
schedules
1200
x7257
659E
New Reform
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
1600
x7254
368A
Sereja and Coat Rack
implementation
1000
x7243
984B
Minesweeper
implementation
1100
x7240
1517D
Explorer Space
dp
,
graphs
,
shortest paths
1800
x7237
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