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2023 Post World Finals Online ICPC Challenge powered by Huawei
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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
290A
Mysterious strings
*special problem
,
implementation
1400
x2943
1046C
Space Formula
greedy
1400
x3035
436B
Om Nom and Spiders
implementation
,
math
1400
x3041
286A
Lucky Permutation
constructive algorithms
,
math
1400
x3103
245E
Mishap in Club
greedy
,
implementation
1400
x3221
30A
Accounting
brute force
,
math
1400
x3311
228B
Two Tables
brute force
,
implementation
1400
x3430
630L
Cracking the Code
implementation
,
math
1400
x3446
665B
Shopping
brute force
1400
x3477
120F
Spiders
dp
,
greedy
,
trees
1400
x3508
334B
Eight Point Sets
sortings
1400
x3542
513B1
Permutations
brute force
1400
x3575
430B
Balls Game
brute force
,
two pointers
1400
x3627
868B
Race Against Time
implementation
1400
x3629
402B
Trees in a Row
brute force
,
implementation
1400
x3686
745B
Hongcow Solves A Puzzle
implementation
1400
x3702
641B
Little Artem and Matrix
implementation
1400
x3733
124B
Permutations
brute force
,
combinatorics
,
implementation
1400
x3751
1600J
Robot Factory
bitmasks
,
dfs and similar
1400
x3771
41B
Martian Dollar
brute force
1400
x3862
632B
Alice, Bob, Two Teams
brute force
,
constructive algorithms
1400
x3896
226A
Flying Saucer Segments
math
1400
x3902
272B
Dima and Sequence
implementation
,
math
1400
x3912
907B
Tic-Tac-Toe
implementation
1400
x4006
1250A
Berstagram
implementation
1400
x4022
8B
Obsession with Robots
constructive algorithms
,
graphs
,
implementation
1400
x4071
270B
Multithreading
data structures
,
greedy
,
implementation
1400
x4083
198B
Jumping on Walls
shortest paths
1400
x4093
865A
Save the problem!
constructive algorithms
1400
x4139
802J
Send the Fool Further! (easy)
dfs and similar
,
graphs
,
trees
1400
x4276
60B
Serial Time!
dfs and similar
,
dsu
1400
x4436
526B
Om Nom and Dark Park
dfs and similar
,
greedy
,
implementation
1400
x4467
197B
Limit
math
1400
x4536
748C
Santa Claus and Robot
constructive algorithms
,
math
1400
x4539
652A
Gabriel and Caterpillar
implementation
,
math
1400
x4553
417C
Football
constructive algorithms
,
graphs
,
implementation
1400
x4606
111A
Petya and Inequiations
greedy
1400
x4620
1773E
Easy Assembly
greedy
,
sortings
1400
x4641
955B
Not simply beatiful strings
implementation
1400
x4733
803A
Maximal Binary Matrix
constructive algorithms
1400
x4739
630H
Benches
combinatorics
,
math
1400
x4739
24A
Ring road
graphs
1400
x4761
44E
Anfisa the Monkey
dp
1400
x4809
107A
Dorm Water Supply
dfs and similar
,
graphs
1400
x4928
261A
Maxim and Discounts
greedy
,
sortings
1400
x5088
1184B1
The Doctor Meets Vader (Easy)
binary search
,
sortings
1400
x5104
981C
Useful Decomposition
implementation
,
trees
1400
x5115
141B
Hopscotch
geometry
,
math
1400
x5131
898C
Phone Numbers
implementation
,
strings
1400
x5135
689A
Mike and Cellphone
brute force
,
constructive algorithms
,
implementation
1400
x5187
248B
Chilly Willy
math
,
number theory
1400
x5189
1425F
Flamingoes of Mystery
interactive
1400
x5209
961C
Chessboard
bitmasks
,
brute force
,
implementation
1400
x5218
851B
Arpa and an exam about geometry
geometry
,
math
1400
x5430
279A
Point on Spiral
brute force
,
geometry
,
implementation
1400
x5469
313C
Ilya and Matrix
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x5521
994B
Knights of a Polygonal Table
greedy
,
implementation
,
sortings
1400
x5534
843A
Sorting by Subsequences
dfs and similar
,
dsu
,
implementation
,
math
,
sortings
1400
x5543
203C
Photographer
greedy
,
sortings
1400
x5577
703B
Mishka and trip
implementation
,
math
1400
x5629
697B
Barnicle
brute force
,
implementation
,
math
,
strings
1400
x5664
219B
Special Offer! Super Price 999 Bourles!
implementation
1400
x5696
1162B
Double Matrix
brute force
,
greedy
1400
x5760
205B
Little Elephant and Sorting
brute force
,
greedy
1400
x5933
808C
Tea Party
constructive algorithms
,
greedy
,
sortings
1400
x5957
369B
Valera and Contest
constructive algorithms
,
implementation
,
math
1400
x6288
1505C
Fibonacci Words
*special problem
,
implementation
1400
x6297
472C
Design Tutorial: Make It Nondeterministic
greedy
1400
x6314
1425A
Arena of Greed
games
,
greedy
1400
x6349
284A
Cows and Primitive Roots
implementation
,
math
,
number theory
1400
x6366
379C
New Year Ratings Change
greedy
,
sortings
1400
x6493
1068A
Birthday
math
1400
x6627
934A
A Compatible Pair
brute force
,
games
1400
x6699
435B
Pasha Maximizes
greedy
1400
x6746
614B
Gena's Code
implementation
,
math
1400
x6764
937B
Vile Grasshoppers
brute force
,
math
,
number theory
1400
x6790
79B
Colorful Field
implementation
,
sortings
1400
x6790
727C
Guess the Array
constructive algorithms
,
interactive
,
math
1400
x6899
441B
Valera and Fruits
greedy
,
implementation
1400
x6934
911C
Three Garlands
brute force
,
constructive algorithms
1400
x6958
995B
Suit and Tie
greedy
,
implementation
,
math
1400
x7015
538A
Cutting Banner
brute force
,
implementation
1400
x7047
180C
Letter
dp
1400
x7048
954B
String Typing
implementation
,
strings
1400
x7096
1866B
Battling with Numbers
combinatorics
,
math
,
number theory
1400
x7172
1061B
Views Matter
greedy
,
implementation
,
sortings
1400
x7214
581C
Developing Skills
implementation
,
math
,
sortings
1400
x7242
675B
Restoring Painting
brute force
,
constructive algorithms
,
math
1400
x7283
233B
Non-square Equation
binary search
,
brute force
,
math
1400
x7304
1468C
Berpizza
data structures
,
implementation
1400
x7416
1004C
Sonya and Robots
constructive algorithms
,
implementation
1400
x7428
762B
USB vs. PS/2
greedy
,
implementation
,
sortings
,
two pointers
1400
x7495
699B
One Bomb
implementation
1400
x7507
677B
Vanya and Food Processor
implementation
,
math
1400
x7531
479B
Towers
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x7544
612C
Replace To Make Regular Bracket Sequence
data structures
,
expression parsing
,
math
1400
x7566
150A
Win or Freeze
games
,
math
,
number theory
1400
x7569
358A
Dima and Continuous Line
brute force
,
implementation
1400
x7602
359B
Permutation
constructive algorithms
,
dp
,
math
1400
x7711
962C
Make a Square
brute force
,
implementation
,
math
1400
x7744
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