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Before contest
Codeforces Round 937 (Div. 4)
05:16:10
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data structures
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
1476E
Pattern Matching
bitmasks
,
data structures
,
dfs and similar
,
graphs
,
hashing
,
sortings
,
strings
2300
x2229
1706E
Qpwoeirut and Vertices
binary search
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
trees
2300
x2318
817F
MEX Queries
binary search
,
data structures
,
trees
2300
x2369
1658D2
388535 (Hard Version)
bitmasks
,
brute force
,
data structures
,
math
2300
x2405
1404C
Fixed Point Removal
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2300
x2466
1494D
Dogeforces
constructive algorithms
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
sortings
,
trees
2300
x2473
1528C
Trees of Tranquillity
data structures
,
dfs and similar
,
greedy
,
trees
2300
x2489
675E
Trains and Statistic
data structures
,
dp
,
greedy
2300
x2580
825E
Minimal Labels
data structures
,
dfs and similar
,
graphs
,
greedy
2300
x2933
708C
Centroids
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2300
x2945
1699D
Almost Triple Deletions
data structures
,
dp
,
greedy
2300
x3004
718C
Sasha and Array
data structures
,
math
,
matrices
2300
x3327
888G
Xor-MST
bitmasks
,
constructive algorithms
,
data structures
2300
x3810
915E
Physical Education Lessons
data structures
,
implementation
,
sortings
2300
x3920
1009F
Dominant Indices
data structures
,
dsu
,
trees
2300
x4983
786B
Legacy
data structures
,
graphs
,
shortest paths
2300
x5275
558E
A Simple Task
data structures
,
sortings
,
strings
2300
x5493
438D
The Child and Sequence
data structures
,
math
2300
x7695
600E
Lomsat gelral
data structures
,
dfs and similar
,
dsu
,
trees
2300
x12350
1488E
Palindromic Doubles
*special problem
,
data structures
,
dp
2200
x188
257E
Greedy Elevator
data structures
,
implementation
2200
x271
47E
Cannon
data structures
,
geometry
,
sortings
2200
x350
916D
Jamie and To-do List
data structures
,
interactive
,
trees
2200
x481
253E
Printer
binary search
,
data structures
,
implementation
,
sortings
2200
x513
144E
Competition
data structures
,
greedy
2200
x556
70C
Lucky Tickets
binary search
,
data structures
,
sortings
,
two pointers
2200
x559
1184C2
Heidi and the Turing Test (Medium)
data structures
2200
x591
219E
Parking Lot
data structures
2200
x594
958B2
Maximum Control (medium)
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
2200
x606
150C
Smart Cheater
data structures
,
math
,
probabilities
2200
x623
413E
Maze 2D
data structures
,
divide and conquer
2200
x660
746F
Music in Car
data structures
,
greedy
,
two pointers
2200
x720
420D
Cup Trick
data structures
2200
x746
191E
Thwarting Demonstrations
binary search
,
data structures
,
trees
2200
x801
138C
Mushroom Gnomes - 2
binary search
,
data structures
,
probabilities
,
sortings
2200
x843
387E
George and Cards
binary search
,
data structures
2200
x844
332C
Students' Revenge
data structures
,
greedy
,
sortings
2200
x868
431E
Chemistry Experiment
binary search
,
data structures
,
ternary search
2200
x889
847D
Dog Show
constructive algorithms
,
data structures
,
greedy
2200
x1002
1136E
Nastya Hasn't Written a Legend
binary search
,
data structures
2200
x1035
1921G
Mischievous Shooter
brute force
,
data structures
,
divide and conquer
,
dp
,
implementation
2200
x1056
733F
Drivers Dissatisfaction
data structures
,
dsu
,
graphs
,
trees
2200
x1082
894D
Ralph And His Tour in Binary Country
brute force
,
data structures
,
trees
2200
x1095
731D
80-th Level Archeology
brute force
,
data structures
,
greedy
,
sortings
2200
x1135
627C
Package Delivery
data structures
,
divide and conquer
,
greedy
2200
x1139
762E
Radio stations
binary search
,
data structures
2200
x1262
756C
Nikita and stack
data structures
2200
x1268
461C
Appleman and a Sheet of Paper
data structures
,
implementation
2200
x1308
965E
Short Code
data structures
,
dp
,
greedy
,
strings
,
trees
2200
x1311
1618G
Trader Problem
data structures
,
dsu
,
greedy
,
sortings
2200
x1438
538F
A Heap of Heaps
brute force
,
data structures
,
math
,
sortings
2200
x1492
1784C
Monsters (hard version)
data structures
,
greedy
2200
x1504
1045G
AI robots
data structures
2200
x1506
490F
Treeland Tour
data structures
,
dfs and similar
,
dp
,
trees
2200
x1529
1468A
LaIS
data structures
,
dp
,
greedy
2200
x1555
1811G2
Vlad and the Nice Paths (hard version)
binary search
,
combinatorics
,
data structures
,
dp
,
math
,
two pointers
2200
x1578
1593G
Changing Brackets
constructive algorithms
,
data structures
,
dp
,
greedy
2200
x1602
1580C
Train Maintenance
brute force
,
data structures
,
implementation
2200
x1636
979D
Kuro and GCD and XOR and SUM
binary search
,
bitmasks
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
number theory
,
strings
,
trees
2200
x1671
1194E
Count The Rectangles
bitmasks
,
brute force
,
data structures
,
geometry
,
sortings
2200
x1717
785E
Anton and Permutation
brute force
,
data structures
2200
x1760
980E
The Number Games
data structures
,
greedy
,
trees
2200
x1776
1841E
Fill the Matrix
data structures
,
greedy
,
math
2200
x1824
1795E
Explosions?
binary search
,
data structures
,
dp
,
greedy
,
math
2200
x1881
1179C
Serge and Dining Room
binary search
,
data structures
,
graph matchings
,
greedy
,
implementation
,
math
,
trees
2200
x1932
555C
Case of Chocolate
data structures
2200
x1940
1335F
Robots on a Grid
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
matrices
2200
x1945
1208E
Let Them Slide
data structures
,
implementation
2200
x1948
875D
High Cry
binary search
,
bitmasks
,
combinatorics
,
data structures
,
divide and conquer
2200
x1959
981E
Addition on Segments
bitmasks
,
data structures
,
divide and conquer
,
dp
2200
x1976
1898E
Sofia and Strings
data structures
,
greedy
,
sortings
,
strings
,
two pointers
2200
x1982
1181D
Irrigation
binary search
,
data structures
,
implementation
,
sortings
,
trees
,
two pointers
2200
x1993
369E
Valera and Queries
binary search
,
data structures
2200
x2009
486E
LIS of Sequence
data structures
,
dp
,
greedy
,
hashing
,
math
2200
x2011
1562D2
Two Hundred Twenty One (hard version)
data structures
,
math
2200
x2066
1398E
Two Types of Spells
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
2200
x2159
301D
Yaroslav and Divisors
data structures
2200
x2175
1627E
Not Escaping
data structures
,
dp
,
implementation
,
shortest paths
,
two pointers
2200
x2194
56E
Domino Principle
binary search
,
data structures
,
sortings
2200
x2195
1822G2
Magic Triples (Hard Version)
brute force
,
data structures
,
math
,
number theory
2200
x2215
813E
Army Creation
binary search
,
data structures
2200
x2246
1295E
Permutation Separation
data structures
,
divide and conquer
2200
x2278
1641C
Anonymity Is Important
binary search
,
brute force
,
data structures
,
dsu
,
greedy
,
sortings
2200
x2293
1526D
Kill Anton
brute force
,
constructive algorithms
,
data structures
,
math
,
strings
2200
x2341
1616E
Lexicographically Small Enough
brute force
,
data structures
,
greedy
,
strings
2200
x2357
1788E
Sum Over Zero
data structures
,
dfs and similar
,
dp
2200
x2419
1557D
Ezzat and Grid
data structures
,
dp
,
greedy
2200
x2439
1556E
Equilibrium
data structures
,
dp
,
greedy
2200
x2498
707D
Persistent Bookcase
bitmasks
,
data structures
,
dfs and similar
,
implementation
2200
x2550
429D
Tricky Function
data structures
,
divide and conquer
,
geometry
2200
x2556
1253E
Antenna Coverage
data structures
,
dp
,
greedy
,
sortings
2200
x2577
1535E
Gold Transfer
binary search
,
data structures
,
dp
,
greedy
,
interactive
,
trees
2200
x2614
1858D
Trees and Segments
brute force
,
data structures
,
dp
,
greedy
,
two pointers
2200
x2631
1806E
Tree Master
brute force
,
data structures
,
dfs and similar
,
trees
2200
x2635
1156E
Special Segments of Permutation
data structures
,
divide and conquer
,
dsu
,
two pointers
2200
x2721
1552F
Telepanting
binary search
,
data structures
,
dp
,
sortings
2200
x2767
1092D2
Great Vova Wall (Version 2)
data structures
,
implementation
2200
x2799
1520F2
Guess the K-th Zero (Hard version)
binary search
,
constructive algorithms
,
data structures
,
interactive
2200
x2864
1175E
Minimal Segment Cover
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
implementation
,
trees
2200
x3130
1503C
Travelling Salesman Problem
binary search
,
data structures
,
dp
,
greedy
,
shortest paths
,
sortings
,
two pointers
2200
x3176
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