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2023 Post World Finals Online ICPC Challenge powered by Huawei
11 days
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Codeforces Round 944 (Div. 4)
20:24:28
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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
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geometry
graph matchings
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greedy
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Problems
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Name
333E
Summer Earnings
binary search
,
bitmasks
,
brute force
,
geometry
,
sortings
2500
x1069
1284E
New Year and Castle Construction
combinatorics
,
geometry
,
math
,
sortings
2500
x1095
1513F
Swapping Problem
brute force
,
constructive algorithms
,
data structures
,
sortings
2500
x1200
1842F
Tenzing and Tree
dfs and similar
,
greedy
,
shortest paths
,
sortings
,
trees
2500
x1244
804D
Expected diameter of a tree
binary search
,
brute force
,
dfs and similar
,
dp
,
sortings
,
trees
2500
x1257
1687C
Sanae and Giant Robot
binary search
,
brute force
,
data structures
,
dsu
,
greedy
,
sortings
2500
x1336
23C
Oranges and Apples
constructive algorithms
,
sortings
2500
x1357
1381C
Mastermind
constructive algorithms
,
graph matchings
,
greedy
,
implementation
,
sortings
,
two pointers
2500
x1389
1452E
Two Editorials
brute force
,
dp
,
greedy
,
sortings
,
two pointers
2500
x1485
1209E2
Rotate Columns (hard version)
bitmasks
,
dp
,
greedy
,
sortings
2500
x1847
1375E
Inversion SwapSort
constructive algorithms
,
greedy
,
sortings
2500
x2774
64I
Sort the Table
*special problem
,
sortings
2400
x84
350D
Looking for Owls
binary search
,
data structures
,
geometry
,
hashing
,
sortings
2400
x256
1403A
The Potion of Great Power
*special problem
,
2-sat
,
binary search
,
data structures
,
graphs
,
interactive
,
sortings
,
two pointers
2400
x286
198E
Gripping Story
binary search
,
data structures
,
sortings
2400
x401
542A
Place Your Ad Here
data structures
,
sortings
2400
x520
883J
Renovation
constructive algorithms
,
greedy
,
sortings
2400
x556
665F
Four Divisors
data structures
,
dp
,
math
,
number theory
,
sortings
,
two pointers
2400
x576
160E
Buses and People
binary search
,
data structures
,
sortings
2400
x576
1080F
Katya and Segments Sets
data structures
,
interactive
,
sortings
2400
x671
639D
Bear and Contribution
data structures
,
greedy
,
sortings
,
two pointers
2400
x779
611E
New Year and Three Musketeers
data structures
,
greedy
,
sortings
2400
x854
1129C
Morse Code
binary search
,
data structures
,
dp
,
hashing
,
sortings
,
string suffix structures
,
strings
2400
x896
1221F
Choose a Square
binary search
,
data structures
,
sortings
2400
x975
1091E
New Year and the Acquaintance Estimation
binary search
,
data structures
,
graphs
,
greedy
,
implementation
,
math
,
sortings
2400
x976
1605E
Array Equalizer
binary search
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2400
x997
1936C
Pokémon Arena
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
2400
x1083
524E
Rooks and Rectangles
data structures
,
sortings
2400
x1156
1764E
Doremy's Number Line
dp
,
greedy
,
sortings
2400
x1179
1005E2
Median on Segments (General Case Edition)
sortings
2400
x1208
1042F
Leaf Sets
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2400
x1238
1374F
Cyclic Shifts Sorting
brute force
,
constructive algorithms
,
implementation
,
sortings
2400
x1258
1886E
I Wanna be the Team Leader
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
math
,
sortings
,
two pointers
2400
x1334
1707C
DFS Trees
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2400
x1388
1606D
Red-Blue Matrix
brute force
,
constructive algorithms
,
implementation
,
sortings
2400
x1400
1615E
Purple Crayon
data structures
,
dfs and similar
,
games
,
graphs
,
greedy
,
math
,
sortings
,
trees
2400
x1404
1367F2
Flying Sort (Hard Version)
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2400
x1442
1463E
Plan of Lectures
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
2400
x1451
1633E
Spanning Tree Queries
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
,
trees
2400
x1458
1826E
Walk the Runway
bitmasks
,
brute force
,
data structures
,
dp
,
graphs
,
implementation
,
sortings
2400
x1500
1830C
Hyperregular Bracket Strings
combinatorics
,
greedy
,
hashing
,
math
,
number theory
,
sortings
2400
x1528
1779E
Anya's Simultaneous Exhibition
constructive algorithms
,
graphs
,
greedy
,
interactive
,
sortings
2400
x1688
798D
Mike and distribution
constructive algorithms
,
sortings
2400
x1847
1485F
Copy or Prefix Sum
combinatorics
,
data structures
,
dp
,
sortings
2400
x1862
1408E
Avoid Rainbow Cycles
data structures
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2400
x1875
12D
Ball
data structures
,
sortings
2400
x2005
1369E
DeadLee
data structures
,
dfs and similar
,
greedy
,
implementation
,
sortings
2400
x2017
1401E
Divide Square
data structures
,
geometry
,
implementation
,
sortings
2400
x2169
1187D
Subarray Sorting
data structures
,
sortings
2400
x2450
246E
Blood Cousins Return
binary search
,
data structures
,
dfs and similar
,
dp
,
sortings
2400
x2967
64H
Table Bowling
*special problem
,
sortings
2300
x109
130I
Array sorting
*special problem
,
sortings
2300
x164
62C
Inquisition
geometry
,
implementation
,
sortings
2300
x247
203E
Transportation
greedy
,
sortings
,
two pointers
2300
x276
101D
Castle
dp
,
greedy
,
probabilities
,
sortings
,
trees
2300
x671
596D
Wilbur and Trees
dp
,
math
,
probabilities
,
sortings
2300
x675
949D
Curfew
binary search
,
brute force
,
greedy
,
sortings
2300
x811
87D
Beautiful Road
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
2300
x845
1379D
New Passenger Trams
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
2300
x1059
558D
Guess Your Way Out! II
data structures
,
implementation
,
sortings
2300
x1110
830C
Bamboo Partition
brute force
,
data structures
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2300
x1185
793C
Mice problem
geometry
,
implementation
,
math
,
sortings
2300
x1230
1864F
Exotic Queries
data structures
,
implementation
,
sortings
2300
x1308
1780F
Three Chairs
bitmasks
,
brute force
,
combinatorics
,
data structures
,
dp
,
number theory
,
sortings
2300
x1372
1513E
Cost Equilibrium
combinatorics
,
constructive algorithms
,
math
,
sortings
2300
x1410
1895E
Infinite Card Game
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
games
,
graphs
,
greedy
,
sortings
,
two pointers
2300
x1454
1197E
Culture Code
binary search
,
combinatorics
,
data structures
,
dp
,
shortest paths
,
sortings
2300
x1457
1399F
Yet Another Segments Subset
data structures
,
dp
,
graphs
,
sortings
2300
x1559
1167F
Scalar Queries
combinatorics
,
data structures
,
math
,
sortings
2300
x1571
1698E
PermutationForces II
brute force
,
combinatorics
,
greedy
,
sortings
,
trees
,
two pointers
2300
x1573
1148E
Earth Wind and Fire
constructive algorithms
,
greedy
,
math
,
sortings
,
two pointers
2300
x1655
1285E
Delete a Segment
brute force
,
constructive algorithms
,
data structures
,
dp
,
graphs
,
sortings
,
trees
,
two pointers
2300
x1664
1621E
New School
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
sortings
2300
x1711
995C
Leaving the Bar
brute force
,
data structures
,
geometry
,
greedy
,
math
,
sortings
2300
x1729
1691E
Number of Groups
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
2300
x1747
1552E
Colors and Intervals
constructive algorithms
,
data structures
,
greedy
,
sortings
2300
x1772
1550D
Excellent Arrays
binary search
,
combinatorics
,
constructive algorithms
,
implementation
,
math
,
sortings
,
two pointers
2300
x1780
1601C
Optimal Insertion
data structures
,
divide and conquer
,
dp
,
greedy
,
sortings
2300
x1915
1625D
Binary Spiders
bitmasks
,
data structures
,
implementation
,
math
,
sortings
,
trees
2300
x1968
1476E
Pattern Matching
bitmasks
,
data structures
,
dfs and similar
,
graphs
,
hashing
,
sortings
,
strings
2300
x2240
1371E2
Asterism (Hard Version)
binary search
,
combinatorics
,
dp
,
math
,
number theory
,
sortings
2300
x2296
160D
Edges in MST
dfs and similar
,
dsu
,
graphs
,
sortings
2300
x2359
1494D
Dogeforces
constructive algorithms
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
sortings
,
trees
2300
x2494
1422D
Returning Home
graphs
,
shortest paths
,
sortings
2300
x2589
154C
Double Profiles
graphs
,
hashing
,
sortings
2300
x2678
1316E
Team Building
bitmasks
,
dp
,
greedy
,
sortings
2300
x3476
915E
Physical Education Lessons
data structures
,
implementation
,
sortings
2300
x4008
598C
Nearest vectors
geometry
,
sortings
2300
x4094
713C
Sonya and Problem Wihtout a Legend
dp
,
sortings
2300
x4783
558E
A Simple Task
data structures
,
sortings
,
strings
2300
x5598
105C
Item World
brute force
,
implementation
,
sortings
2200
x270
178F2
Representative Sampling
dp
,
sortings
,
strings
2200
x314
47E
Cannon
data structures
,
geometry
,
sortings
2200
x352
1424M
Ancient Language
graphs
,
sortings
2200
x521
253E
Printer
binary search
,
data structures
,
implementation
,
sortings
2200
x521
85C
Petya and Tree
binary search
,
dfs and similar
,
probabilities
,
sortings
,
trees
2200
x522
70C
Lucky Tickets
binary search
,
data structures
,
sortings
,
two pointers
2200
x561
1184B2
The Doctor Meets Vader (Medium)
flows
,
graph matchings
,
graphs
,
shortest paths
,
sortings
2200
x566
1949F
Dating
greedy
,
sortings
,
trees
2200
x734
196C
Paint Tree
constructive algorithms
,
divide and conquer
,
geometry
,
sortings
,
trees
2200
x740
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