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2023 Post World Finals Online ICPC Challenge powered by Huawei
35:15:41
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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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Problems
#
Name
1165F1
Microtransactions (easy version)
binary search
,
greedy
2000
x1765
509E
Pretty Song
math
,
strings
2000
x1770
1252K
Addition Robot
data structures
,
math
,
matrices
2100
x1782
549H
Degenerate Matrix
binary search
,
math
2100
x1785
1903E
Geo Game
greedy
,
interactive
,
math
2000
x1790
1900E
Transitive Graph
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
2100
x1794
1510D
Digits
dp
,
math
,
number theory
2100
x1798
1185F
Two Pizzas
bitmasks
,
brute force
2100
x1801
78C
Beaver Game
dp
,
games
,
number theory
2000
x1801
242D
Dispute
dfs and similar
,
graphs
,
greedy
2100
x1806
412D
Giving Awards
dfs and similar
2000
x1807
689E
Mike and Geometry Problem
combinatorics
,
data structures
,
dp
,
geometry
,
implementation
2000
x1808
748D
Santa Claus and a Palindrome
constructive algorithms
,
data structures
,
greedy
2100
x1810
919E
Congruence Equation
chinese remainder theorem
,
math
,
number theory
2100
x1824
676D
Theseus and labyrinth
graphs
,
implementation
,
shortest paths
2000
x1827
954E
Water Taps
binary search
,
greedy
,
sortings
2000
x1828
1083B
The Fair Nut and Strings
greedy
,
strings
2000
x1845
333D
Characteristics of Rectangles
binary search
,
bitmasks
,
brute force
,
implementation
,
sortings
2100
x1846
1027E
Inverse Coloring
combinatorics
,
dp
,
math
2100
x1859
975D
Ghosts
geometry
,
math
2000
x1869
1120C
Compress String
dp
,
strings
2100
x1870
933B
A Determined Cleanup
math
2000
x1873
784E
Twisted Circuit
*special problem
,
brute force
,
implementation
2000
x1877
145C
Lucky Subsequence
combinatorics
,
dp
,
math
2100
x1882
1019B
The hat
binary search
,
interactive
2000
x1891
954G
Castle Defense
binary search
,
data structures
,
greedy
,
two pointers
2000
x1894
761E
Dasha and Puzzle
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2000
x1895
1102F
Elongated Matrix
binary search
,
bitmasks
,
brute force
,
dp
,
graphs
2000
x1903
1811G1
Vlad and the Nice Paths (easy version)
combinatorics
,
dp
,
math
2100
x1906
1413E
Solo mid Oracle
greedy
,
math
,
ternary search
2100
x1907
82D
Two out of Three
dp
2000
x1919
875C
National Property
2-sat
,
dfs and similar
,
graphs
,
implementation
2100
x1921
730I
Olympiad in Programming and Sports
dp
,
flows
,
graphs
,
greedy
2000
x1942
1776G
Another Wine Tasting Event
combinatorics
,
constructive algorithms
,
math
,
strings
2100
x1949
358C
Dima and Containers
constructive algorithms
,
greedy
,
implementation
2000
x1950
912D
Fishes
data structures
,
graphs
,
greedy
,
probabilities
,
shortest paths
2100
x1952
1023E
Down or Right
constructive algorithms
,
interactive
,
matrices
2100
x1955
1525E
Assimilation IV
combinatorics
,
dp
,
math
,
probabilities
,
two pointers
2100
x1963
799D
Field expansion
brute force
,
dp
,
meet-in-the-middle
2100
x1969
990E
Post Lamps
brute force
,
greedy
2100
x1973
850B
Arpa and a list of numbers
implementation
,
number theory
2100
x1973
1056E
Check Transcription
brute force
,
data structures
,
hashing
,
strings
2100
x1976
855C
Helga Hufflepuff's Cup
dp
,
trees
2000
x1977
103D
Time to Raid Cowavans
brute force
,
data structures
,
sortings
2100
x1983
631D
Messenger
data structures
,
hashing
,
implementation
,
string suffix structures
,
strings
2100
x1986
1070C
Cloud Computing
data structures
,
greedy
2000
x1995
601B
Lipshitz Sequence
data structures
,
math
2100
x2002
1896E
Permutation Sorting
data structures
,
sortings
2100
x2003
509C
Sums of Digits
dp
,
greedy
,
implementation
2000
x2004
540E
Infinite Inversions
binary search
,
data structures
,
implementation
,
sortings
,
trees
2100
x2006
571A
Lengthening Sticks
combinatorics
,
implementation
,
math
2100
x2007
1619F
Let's Play the Hat?
brute force
,
constructive algorithms
,
greedy
,
math
2000
x2009
21C
Stripe 2
binary search
,
dp
,
sortings
2000
x2013
1165F2
Microtransactions (hard version)
binary search
,
greedy
,
implementation
2000
x2021
340B
Maximal Area Quadrilateral
brute force
,
geometry
2100
x2023
1801D
The way home
binary search
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x2037
348B
Apple Tree
dfs and similar
,
number theory
,
trees
2100
x2040
696C
PLEASE
combinatorics
,
dp
,
implementation
,
math
,
matrices
2000
x2048
896B
Ithea Plays With Chtholly
binary search
,
constructive algorithms
,
games
,
greedy
,
interactive
2000
x2049
965C
Greedy Arkady
math
2000
x2053
466E
Information Graph
dfs and similar
,
dsu
,
graphs
,
trees
2100
x2056
1729G
Cut Substrings
combinatorics
,
dp
,
hashing
,
strings
,
two pointers
2100
x2058
666B
World Tour
graphs
,
shortest paths
2000
x2066
296B
Yaroslav and Two Strings
combinatorics
,
dp
2000
x2066
1266E
Spaceship Solitaire
data structures
,
greedy
,
implementation
2100
x2069
803E
Roma and Poker
dp
,
graphs
2000
x2098
776E
The Holmes Children
math
,
number theory
2100
x2100
229D
Towers
dp
,
greedy
,
two pointers
2100
x2100
431D
Random Task
binary search
,
bitmasks
,
combinatorics
,
dp
,
math
2100
x2104
767B
The Queue
brute force
,
greedy
2100
x2106
301B
Yaroslav and Time
binary search
,
graphs
,
shortest paths
2100
x2109
1108E2
Array and Segments (Hard version)
data structures
,
implementation
2100
x2117
196B
Infinite Maze
dfs and similar
,
graphs
2000
x2121
814D
An overnight dance in discotheque
dfs and similar
,
dp
,
geometry
,
greedy
,
trees
2000
x2125
1876C
Autosynthesis
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
sortings
2100
x2133
843B
Interactive LowerBound
brute force
,
interactive
,
probabilities
2000
x2134
754D
Fedor and coupons
binary search
,
data structures
,
greedy
,
sortings
2100
x2135
557D
Vitaly and Cycle
combinatorics
,
dfs and similar
,
graphs
,
math
2000
x2135
894E
Ralph and Mushrooms
dp
,
graphs
2100
x2138
600D
Area of Two Circles' Intersection
geometry
2000
x2139
1129B
Wrong Answer
constructive algorithms
2000
x2150
1201D
Treasure Hunting
binary search
,
dp
,
greedy
,
implementation
2100
x2151
1881G
Anya and the Mysterious String
binary search
,
data structures
2000
x2155
15C
Industrial Nim
games
2000
x2156
166B
Polygons
geometry
,
sortings
2100
x2157
1808D
Petya, Petya, Petr, and Palindromes
binary search
,
brute force
,
data structures
,
two pointers
2100
x2162
1839D
Ball Sorting
data structures
,
dp
,
sortings
2100
x2172
414C
Mashmokh and Reverse Operation
combinatorics
,
divide and conquer
2100
x2173
1787E
The Harmonization of XOR
bitmasks
,
constructive algorithms
,
greedy
,
math
2100
x2175
976E
Well played!
greedy
,
sortings
2100
x2182
1933F
Turtle Mission: Robot and the Earthquake
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2187
767D
Cartons of milk
binary search
,
data structures
,
greedy
,
sortings
,
two pointers
2100
x2193
988F
Rain and Umbrellas
dp
2100
x2196
1190D
Tokitsukaze and Strange Rectangle
data structures
,
divide and conquer
,
sortings
,
two pointers
2000
x2212
1741F
Multi-Colored Segments
binary search
,
data structures
,
math
,
sortings
2000
x2222
1772F
Copy of a Copy of a Copy
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
,
sortings
2000
x2229
1598E
Staircases
brute force
,
combinatorics
,
data structures
,
dfs and similar
,
dp
,
implementation
,
math
2100
x2237
1821E
Rearrange Brackets
brute force
,
dp
,
greedy
,
sortings
,
strings
2100
x2240
840B
Leha and another game about graph
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
graphs
2100
x2241
721D
Maxim and Array
constructive algorithms
,
data structures
,
greedy
,
math
2000
x2252
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