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Codeforces and Polygon may be unavailable from
May 23, 4:00 (UTC)
to
May 23, 8:00 (UTC)
due to technical maintenance.
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Problems
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Status
Standings
Custom test
Problems
#
Name
645E
Intellectual Inquiry
dp
,
greedy
,
strings
2200
x1221
643C
Levels and Regions
dp
2400
x1316
641D
Little Artem and Random Variable
dp
,
implementation
,
math
,
probabilities
2400
x1047
632E
Thief in a Shop
divide and conquer
,
dp
,
fft
,
math
2400
x2585
629E
Famil Door and Roads
combinatorics
,
data structures
,
dfs and similar
,
dp
,
probabilities
,
trees
2300
x969
628D
Magic Numbers
dp
2200
x5420
626F
Group Projects
dp
2400
x2680
623B
Array GCD
dp
,
greedy
,
number theory
2300
x2046
618D
Hamiltonian Spanning Tree
dfs and similar
,
dp
,
graph matchings
,
greedy
,
trees
2200
x1692
601C
Kleofáš and the n-thlon
dp
,
math
,
probabilities
2300
x1290
596E
Wilbur and Strings
dfs and similar
,
dp
,
graphs
,
strings
2500
x388
596D
Wilbur and Trees
dp
,
math
,
probabilities
,
sortings
2300
x675
593E
Strange Calculation and Cats
dp
,
matrices
2400
x399
592D
Super M
dfs and similar
,
dp
,
graphs
,
trees
2200
x2357
590D
Top Secret Task
dp
2300
x1147
587B
Duff in Beach
dp
2100
x1377
581F
Zublicanes and Mumocrates
dp
,
trees
,
two pointers
2400
x851
575F
Bulbo
dp
,
greedy
2100
x985
570E
Pig and Palindromes
combinatorics
,
dp
2300
x1810
567F
Mausoleum
dp
2400
x567
559C
Gerald and Giant Chess
combinatorics
,
dp
,
math
,
number theory
2200
x6166
557E
Ann and Half-Palindrome
data structures
,
dp
,
graphs
,
string suffix structures
,
strings
,
trees
2300
x1058
552E
Vanya and Brackets
brute force
,
dp
,
expression parsing
,
greedy
,
implementation
,
strings
2100
x1410
547C
Mike and Foam
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
2300
x2713
543D
Road Improvement
dp
,
trees
2300
x2541
543C
Remembering Strings
bitmasks
,
dp
2500
x1358
542F
Quest
dp
,
greedy
2100
x743
538E
Demiurges Play Again
dfs and similar
,
dp
,
math
,
trees
2200
x1500
534F
Simplified Nonogram
bitmasks
,
dp
,
hashing
,
meet-in-the-middle
2400
x444
526E
Transmitting Levels
dp
,
implementation
2400
x1056
525E
Anya and Cubes
binary search
,
bitmasks
,
brute force
,
dp
,
math
,
meet-in-the-middle
2100
x2764
520E
Pluses everywhere
combinatorics
,
dp
,
math
,
number theory
2200
x1810
519E
A and B and Lecture Rooms
binary search
,
data structures
,
dfs and similar
,
dp
,
trees
2100
x6222
518F
Pasha and Pipe
binary search
,
brute force
,
combinatorics
,
dp
,
implementation
2300
x352
514E
Darth Vader and Tree
dp
,
matrices
2200
x1370
513G2
Inversions problem
dp
,
probabilities
2400
x628
509F
Progress Monitoring
dp
,
trees
2300
x863
508E
Arthur and Brackets
dp
,
greedy
2200
x1535
507E
Breaking Good
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2595
507D
The Maths Lecture
dp
,
implementation
2200
x1696
500E
New Year Domino
data structures
,
dp
,
dsu
2300
x1399
498D
Traffic Jams in the Land
data structures
,
dp
,
number theory
2400
x1064
498B
Name That Tune
dp
,
probabilities
,
two pointers
2400
x1149
490F
Treeland Tour
data structures
,
dfs and similar
,
dp
,
trees
2200
x1561
489F
Special Matrices
combinatorics
,
dp
2100
x1597
489E
Hiking
binary search
,
dp
2300
x999
486E
LIS of Sequence
data structures
,
dp
,
greedy
,
hashing
,
math
2200
x2076
486D
Valid Sets
dfs and similar
,
dp
,
math
,
trees
2100
x3858
484D
Kindergarten
data structures
,
dp
,
greedy
2400
x2420
476E
Dreamoon and Strings
dp
,
strings
2200
x1760
467E
Alex and Complicated Task
data structures
,
dp
,
greedy
2300
x767
467D
Fedor and Essay
dfs and similar
,
dp
,
graphs
,
hashing
,
strings
2400
x1769
466D
Increase Sequence
combinatorics
,
dp
2100
x2845
464C
Substitutes in Number
dp
2100
x1652
455C
Civilization
dfs and similar
,
dp
,
dsu
,
ternary search
,
trees
2100
x5162
449D
Jzzhu and Numbers
bitmasks
,
combinatorics
,
dp
2400
x4099
441E
Valera and Number
bitmasks
,
dp
,
math
,
probabilities
2400
x676
440D
Berland Federalization
dp
,
trees
2200
x628
439E
Devu and Birthday Celebration
combinatorics
,
dp
,
math
2100
x1483
437E
The Child and Polygon
dp
,
geometry
2500
x690
433E
Tachibana Kanade's Tofu
dp
2500
x472
431D
Random Task
binary search
,
bitmasks
,
combinatorics
,
dp
,
math
2100
x2106
429C
Guess the Tree
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
trees
2300
x902
427D
Match & Catch
dp
,
string suffix structures
,
strings
2200
x2103
425E
Sereja and Sets
dp
2500
x547
425C
Sereja and Two Sequences
data structures
,
dp
2300
x882
424E
Colored Jenga
dfs and similar
,
dp
,
probabilities
2500
x128
424D
Biathlon Track
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
2300
x557
416E
President's Path
dp
,
graphs
,
shortest paths
2500
x1391
403D
Beautiful Pairs of Numbers
combinatorics
,
dp
2300
x1067
386D
Game with Points
dp
,
graphs
,
implementation
,
shortest paths
2100
x413
385D
Bear and Floodlight
bitmasks
,
dp
,
geometry
2200
x798
383D
Antimatter
dp
2300
x2897
377C
Captains Mode
bitmasks
,
dp
,
games
2200
x1107
372C
Watching Fireworks is Fun
data structures
,
dp
,
math
2100
x3647
370E
Summer Reading
dp
,
greedy
2500
x230
369D
Valera and Fools
dfs and similar
,
dp
,
graphs
,
shortest paths
2200
x1095
364B
Free Market
dp
,
greedy
2200
x1150
360C
Levko and Strings
combinatorics
,
dp
2500
x1064
354E
Lucky Number Representation
constructive algorithms
,
dfs and similar
,
dp
2200
x872
354C
Vasya and Beautiful Arrays
brute force
,
dp
,
number theory
2100
x2983
354B
Game with Strings
bitmasks
,
dp
,
games
2400
x448
353E
Antichain
dp
,
graph matchings
,
greedy
2200
x569
351C
Jeff and Brackets
dp
,
matrices
2500
x539
348D
Turtles
dp
,
matrices
2500
x1576
342D
Xenia and Dominoes
bitmasks
,
dfs and similar
,
dp
2100
x488
335D
Rectangles and Square
brute force
,
dp
2400
x305
332E
Binary Key
dp
,
greedy
,
implementation
2400
x297
331C3
The Great Julya Calendar
dp
2500
x461
331C2
The Great Julya Calendar
dp
2400
x364
327E
Axis Walking
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
meet-in-the-middle
2300
x1352
319C
Kalila and Dimna in the Logging Industry
dp
,
geometry
2100
x4758
317D
Game with Powers
dp
,
games
2300
x975
316D3
PE Lesson
dp
,
math
2400
x535
316D2
PE Lesson
dp
2300
x419
316D1
PE Lesson
brute force
,
dp
2300
x481
313D
Ilya and Roads
dp
2100
x1425
311B
Cats Transport
data structures
,
dp
2400
x3235
309B
Context Advertising
dp
,
two pointers
2100
x499
300D
Painting Square
dp
,
fft
2300
x738
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dp
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expression parsing
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graphs
greedy
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number theory
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string suffix structures
strings
ternary search
trees
two pointers
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