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Codeforces Round 943 (Div. 3)
05:19:05
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flows
combine-tags-by-or
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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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Problems
#
Name
1624C
Division by Two and Permutation
constructive algorithms
,
flows
,
graph matchings
,
greedy
,
math
1100
x23987
1549B
Gregor and the Pawn Game
dfs and similar
,
dp
,
flows
,
graph matchings
,
graphs
,
greedy
,
implementation
800
x23741
1797A
Li Hua and Maze
constructive algorithms
,
flows
,
graphs
,
greedy
,
implementation
800
x16916
1706C
Qpwoeirut And The City
dp
,
flows
,
greedy
,
implementation
1400
x14422
1966A
Card Exchange
chinese remainder theorem
,
flows
,
greedy
,
string suffix structures
x12715
1438C
Engineer Artem
2-sat
,
chinese remainder theorem
,
constructive algorithms
,
fft
,
flows
2000
x10146
1437C
Chef Monocarp
dp
,
flows
,
graph matchings
,
greedy
,
math
,
sortings
1800
x10102
1119B
Alyona and a Narrow Fridge
binary search
,
flows
,
greedy
,
sortings
1300
x9807
1525D
Armchairs
dp
,
flows
,
graph matchings
,
greedy
1800
x9364
1530D
Secret Santa
constructive algorithms
,
flows
,
graphs
,
greedy
,
math
1600
x8884
1426E
Rock, Paper, Scissors
brute force
,
constructive algorithms
,
flows
,
greedy
,
math
1800
x7215
1214D
Treasure Island
dfs and similar
,
dp
,
flows
,
hashing
1900
x4930
1016D
Vasya And The Matrix
constructive algorithms
,
flows
,
math
1800
x4423
1770D
Koxia and Game
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
flows
,
games
,
graph matchings
,
graphs
,
implementation
2000
x3661
546E
Soldier and Traveling
flows
,
graphs
,
math
2100
x3440
498C
Array and Operations
flows
,
graph matchings
,
number theory
2100
x3284
965D
Single-use Stones
binary search
,
flows
,
greedy
,
two pointers
1900
x2958
321B
Ciel and Duel
dp
,
flows
,
greedy
1900
x2953
1926G
Vlad and Trouble at MIT
dfs and similar
,
dp
,
flows
,
graphs
,
greedy
,
implementation
,
trees
1900
x2901
1486E
Paired Payment
binary search
,
brute force
,
constructive algorithms
,
dp
,
flows
,
graphs
,
shortest paths
2200
x2789
899E
Segments Removal
data structures
,
dsu
,
flows
,
implementation
,
two pointers
2000
x2735
653D
Delivery Bears
binary search
,
flows
,
graphs
2200
x2326
510E
Fox And Dinner
flows
2300
x2140
1034B
Little C Loves 3 II
brute force
,
constructive algorithms
,
flows
,
graph matchings
2200
x2072
739E
Gosha is hunting
brute force
,
data structures
,
dp
,
flows
,
math
,
probabilities
,
sortings
3000
x2046
730I
Olympiad in Programming and Sports
dp
,
flows
,
graphs
,
greedy
2000
x1940
1082G
Petya and Graph
flows
,
graphs
2400
x1921
723E
One-Way Reform
constructive algorithms
,
dfs and similar
,
flows
,
graphs
,
greedy
2200
x1882
727D
T-shirts Distribution
constructive algorithms
,
flows
,
greedy
1800
x1797
1423B
Valuable Paper
binary search
,
flows
,
graph matchings
,
graphs
1900
x1765
1748E
Yet Another Array Counting Problem
binary search
,
data structures
,
divide and conquer
,
dp
,
flows
,
math
,
trees
2300
x1697
1139E
Maximize Mex
flows
,
graph matchings
,
graphs
2400
x1641
877F
Ann and Books
data structures
,
flows
,
hashing
2300
x1608
269C
Flawed Flow
constructive algorithms
,
flows
,
graphs
,
greedy
2100
x1592
237E
Build String
flows
,
graphs
2000
x1586
1866G
Grouped Carriages
binary search
,
data structures
,
dp
,
flows
,
greedy
2100
x1502
1455E
Four Points
brute force
,
constructive algorithms
,
flows
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
2400
x1428
1741G
Kirill and Company
bitmasks
,
brute force
,
dfs and similar
,
dp
,
flows
,
graphs
,
shortest paths
2200
x1416
277E
Binary Tree on Plane
flows
,
trees
2400
x1233
724E
Goods transportation
dp
,
flows
,
greedy
2900
x1224
280D
k-Maximum Subsequence Sum
data structures
,
flows
,
graphs
,
implementation
2800
x1187
863F
Almost Permutation
flows
2200
x1184
1404E
Bricks
flows
,
graph matchings
,
graphs
2800
x1090
802N
April Fools' Problem (medium)
binary search
,
flows
,
graphs
2400
x1090
808F
Card Game
binary search
,
flows
,
graphs
2400
x1072
311E
Biologist
flows
2300
x1045
1354F
Summoning Minions
constructive algorithms
,
dp
,
flows
,
graph matchings
,
greedy
,
sortings
2500
x975
1198E
Rectangle Painting 2
flows
,
graph matchings
,
graphs
2500
x973
813D
Two Melodies
dp
,
flows
2600
x964
1955H
The Most Reckless Defense
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
flows
,
graph matchings
,
shortest paths
2300
x954
852D
Exploration plan
binary search
,
flows
,
graph matchings
,
shortest paths
2100
x948
884F
Anti-Palindromize
flows
,
graphs
,
greedy
2500
x935
1783F
Double Sort II
dfs and similar
,
flows
,
graph matchings
,
graphs
2500
x910
1473F
Strange Set
flows
,
math
2700
x903
1913E
Matrix Problem
flows
,
graphs
2400
x900
164C
Machine Programming
flows
,
graphs
2400
x874
1263F
Economic Difficulties
data structures
,
dfs and similar
,
dp
,
flows
,
graphs
,
trees
2400
x834
802O
April Fools' Problem (hard)
binary search
,
data structures
,
flows
2900
x817
103E
Buying Sets
flows
,
graph matchings
2900
x815
362E
Petya and Pipes
flows
,
graphs
,
shortest paths
2300
x795
1146G
Zoning Restrictions
dp
,
flows
,
graphs
2700
x793
704D
Captain America
flows
,
greedy
3100
x776
1009G
Allowed Letters
bitmasks
,
flows
,
graph matchings
,
graphs
,
greedy
2400
x767
1264E
Beautiful League
constructive algorithms
,
flows
,
graph matchings
2700
x747
1919F2
Wine Factory (Hard Version)
data structures
,
dp
,
flows
,
greedy
,
matrices
2800
x734
628F
Bear and Fair Set
flows
,
graphs
2500
x729
1107F
Vasya and Endless Credits
dp
,
flows
,
graph matchings
,
graphs
,
sortings
2600
x719
1510B
Button Lock
flows
,
graph matchings
,
graphs
2600
x704
708D
Incorrect Flow
flows
2900
x689
343E
Pumping Stations
brute force
,
dfs and similar
,
divide and conquer
,
flows
,
graphs
,
greedy
,
trees
2900
x670
1592F2
Alice and Recoloring 2
constructive algorithms
,
flows
,
graph matchings
,
greedy
2800
x663
1765A
Access Levels
bitmasks
,
dsu
,
flows
,
graph matchings
2400
x658
818G
Four Melodies
flows
,
graphs
2600
x625
1430G
Yet Another DAG Problem
bitmasks
,
dfs and similar
,
dp
,
flows
,
graphs
,
math
2600
x623
717G
Underfail
flows
2400
x619
847J
Students Initiation
binary search
,
flows
,
graphs
2400
x615
316C2
Tidying Up
flows
,
graph matchings
2300
x615
786E
ALT
data structures
,
flows
,
graphs
,
trees
3200
x601
1684G
Euclid Guess
constructive algorithms
,
flows
,
graph matchings
,
math
,
number theory
2800
x577
611H
New Year and Forgotten Tree
constructive algorithms
,
flows
,
graphs
3200
x576
1090E
Horseback Riding
flows
,
graphs
2300
x573
1252L
Road Construction
flows
,
graphs
2300
x567
976F
Minimal k-covering
flows
,
graphs
2500
x561
316C1
Tidying Up
flows
2200
x545
1184B2
The Doctor Meets Vader (Medium)
flows
,
graph matchings
,
graphs
,
shortest paths
,
sortings
2200
x538
1709F
Multiset of Strings
bitmasks
,
brute force
,
dp
,
fft
,
flows
,
graphs
,
math
,
meet-in-the-middle
,
trees
2500
x532
1070I
Privatization of Roads in Berland
flows
,
graph matchings
,
graphs
2400
x532
802C
Heidi and Library (hard)
flows
2600
x528
78E
Evacuation
flows
,
graphs
,
shortest paths
2300
x526
132E
Bits of merry old England
flows
,
graphs
2700
x521
1061E
Politics
flows
,
graphs
2600
x511
1717F
Madoka and The First Session
constructive algorithms
,
flows
,
graph matchings
,
graphs
,
implementation
2500
x510
903G
Yet Another Maxflow Problem
data structures
,
flows
,
graphs
2700
x509
1187G
Gang Up
flows
,
graphs
2500
x499
1630F
Making It Bipartite
flows
,
graph matchings
,
graphs
,
number theory
3400
x491
1307G
Cow and Exercise
flows
,
graphs
,
shortest paths
3100
x478
1572D
Bridge Club
flows
,
graph matchings
,
graphs
,
greedy
2800
x467
1288F
Red-Blue Graph
constructive algorithms
,
flows
2900
x443
1773D
Dominoes
combinatorics
,
flows
,
graph matchings
,
greedy
2600
x418
1517G
Starry Night Camping
constructive algorithms
,
flows
,
graphs
3300
x412
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