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3 days
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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
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Custom test
Problems
#
Name
567C
Geometric Progression
binary search
,
data structures
,
dp
1700
x9653
566F
Clique in the Divisibility Graph
dp
,
math
,
number theory
1500
x3708
559B
Equivalent Strings
divide and conquer
,
hashing
,
sortings
,
strings
1700
x10741
559A
Gerald's Hexagon
brute force
,
geometry
,
math
1600
x10493
557B
Pasha and Tea
constructive algorithms
,
implementation
,
math
,
sortings
1500
x7220
555A
Case of Matryoshkas
implementation
1500
x6560
553A
Kyoya and Colored Balls
combinatorics
,
dp
,
math
1500
x8773
551B
ZgukistringZ
brute force
,
constructive algorithms
,
implementation
,
strings
1800
x3866
550C
Divisibility by Eight
brute force
,
dp
,
math
1500
x29148
550B
Preparing Olympiad
bitmasks
,
brute force
1400
x21985
550A
Two Substrings
brute force
,
dp
,
greedy
,
implementation
,
strings
1500
x38665
548B
Mike and Fun
brute force
,
dp
,
greedy
,
implementation
1400
x8505
546D
Soldier and Number Game
constructive algorithms
,
dp
,
math
,
number theory
1700
x12092
546C
Soldier and Cards
brute force
,
dfs and similar
,
games
1400
x17812
545C
Woodcutters
dp
,
greedy
1500
x28598
544B
Sea and Islands
constructive algorithms
,
implementation
1400
x8084
543A
Writing Code
dp
1800
x8060
540B
School Marks
greedy
,
implementation
1700
x4718
538D
Weird Chess
brute force
,
constructive algorithms
,
implementation
1800
x2456
538C
Tourist's Notes
binary search
,
brute force
,
greedy
,
implementation
,
math
1600
x5856
538B
Quasi Binary
constructive algorithms
,
dp
,
greedy
,
implementation
1400
x18237
538A
Cutting Banner
brute force
,
implementation
1400
x7156
534C
Polycarpus' Dice
math
1600
x5048
534B
Covered Path
dp
,
greedy
,
math
1400
x10396
533E
Correcting Mistakes
constructive algorithms
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x2285
533C
Board Game
games
,
greedy
,
implementation
,
math
1700
x2214
530E
Sum and product
*special problem
1700
x308
530D
Set subtraction
*special problem
1600
x453
530C
Diophantine equation
*special problem
1500
x557
530B
String inside out
*special problem
1600
x543
530A
Quadratic equation
*special problem
1500
x678
527D
Clique Problem
data structures
,
dp
,
greedy
,
implementation
,
sortings
1800
x4821
527C
Glass Carving
binary search
,
data structures
,
implementation
1500
x6991
527B
Error Correct System
greedy
1500
x3897
526B
Om Nom and Dark Park
dfs and similar
,
greedy
,
implementation
1400
x4516
525C
Ilya and Sticks
greedy
,
math
,
sortings
1600
x5838
525B
Pasha and String
constructive algorithms
,
greedy
,
math
,
strings
1400
x9483
524B
Фото на память - 2 (round version)
dp
,
greedy
1700
x1469
524A
Возможно, вы знаете этих людей?
implementation
1600
x1418
523D
Statistics of Recompressing Videos
*special problem
,
data structures
,
implementation
1600
x2361
523C
Name Quest
*special problem
,
greedy
1400
x2509
523B
Mean Requests
*special problem
,
implementation
1500
x953
520C
DNA Alignment
math
,
strings
1500
x4179
520B
Two Buttons
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
,
shortest paths
1400
x52282
519D
A and B and Interesting Substrings
data structures
,
dp
,
two pointers
1800
x6418
518D
Ilya and Escalator
combinatorics
,
dp
,
math
,
probabilities
1700
x7105
518C
Anya and Smartphone
constructive algorithms
,
data structures
,
implementation
1600
x6070
518B
Tanya and Postcard
greedy
,
implementation
,
strings
1400
x8018
518A
Vitaly and Strings
constructive algorithms
,
strings
1600
x9256
515C
Drazil and Factorial
greedy
,
math
,
sortings
1400
x26331
514B
Han Solo and Lazer Gun
brute force
,
data structures
,
geometry
,
implementation
,
math
1400
x21043
513G1
Inversions problem
brute force
,
dfs and similar
,
dp
,
meet-in-the-middle
1800
x1795
513B2
Permutations
bitmasks
,
divide and conquer
,
math
1800
x2808
513B1
Permutations
brute force
1400
x3716
510C
Fox And Names
dfs and similar
,
graphs
,
sortings
1600
x16759
510B
Fox And Two Dots
dfs and similar
1500
x14194
508C
Anya and Ghosts
constructive algorithms
,
greedy
1600
x4486
507C
Guess Your Way Out!
implementation
,
math
,
trees
1700
x4391
507B
Amr and Pins
geometry
,
math
1400
x24974
505B
Mr. Kitayuta's Colorful Graph
dfs and similar
,
dp
,
dsu
,
graphs
1400
x13286
501C
Misha and Forest
constructive algorithms
,
data structures
,
greedy
,
sortings
,
trees
1500
x5685
500C
New Year Book Reading
constructive algorithms
,
greedy
,
implementation
,
math
1600
x5842
500B
New Year Permutation
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
1600
x8944
498A
Crazy Town
geometry
1700
x6511
496C
Removing Columns
brute force
,
constructive algorithms
,
implementation
1500
x7783
496B
Secret Combination
brute force
,
constructive algorithms
,
implementation
1500
x5961
495B
Modular Equations
math
,
number theory
1600
x7089
494A
Treasure
greedy
1500
x6274
493D
Vasya and Chess
constructive algorithms
,
games
,
math
1700
x9754
493C
Vasya and Basketball
binary search
,
brute force
,
data structures
,
implementation
,
sortings
,
two pointers
1600
x6863
493B
Vasya and Wrestling
implementation
1400
x13427
492D
Vanya and Computer Game
binary search
,
implementation
,
math
,
sortings
1800
x3184
492C
Vanya and Exams
greedy
,
sortings
1400
x14272
490C
Hacking Cypher
brute force
,
math
,
number theory
,
strings
1700
x9134
490B
Queue
dsu
,
implementation
1500
x6073
489D
Unbearable Controversy of Being
brute force
,
combinatorics
,
dfs and similar
,
graphs
1700
x6723
489C
Given Length and Sum of Digits...
dp
,
greedy
,
implementation
1400
x46941
487A
Fight the Monster
binary search
,
brute force
,
implementation
1800
x3779
486C
Palindrome Transformation
brute force
,
greedy
,
implementation
1700
x11819
485A
Factory
implementation
,
math
,
matrices
1400
x8364
484A
Bits
bitmasks
,
constructive algorithms
1700
x11597
483B
Friends and Presents
binary search
,
math
1800
x4108
482B
Interesting Array
constructive algorithms
,
data structures
,
trees
1800
x6644
479D
Long Jumps
binary search
,
greedy
,
implementation
1700
x4849
479C
Exams
greedy
,
sortings
1400
x30093
479B
Towers
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x7954
478C
Table Decorations
greedy
1800
x18524
476C
Dreamoon and Sums
math
1600
x5765
475B
Strongly Connected City
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x8603
474D
Flowers
dp
1700
x26062
472C
Design Tutorial: Make It Nondeterministic
greedy
1400
x6377
471D
MUH and Cube Walls
string suffix structures
,
strings
1800
x8429
471C
MUH and House of Cards
binary search
,
brute force
,
greedy
,
math
1700
x3581
470B
Hexakosioihexekontahexaphobia
*special problem
1800
x260
470A
Crystal Ball Sequence
*special problem
,
implementation
1400
x680
468A
24 Game
constructive algorithms
,
greedy
,
math
1500
x8026
467C
George and Job
dp
,
implementation
1700
x14885
466C
Number of Ways
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x36868
464A
No to Palindromes!
greedy
,
strings
1700
x5936
460C
Present
binary search
,
data structures
,
greedy
1700
x6277
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