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Codeforces Round 953 (Div. 2)
07:06:46
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Difficulty:
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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
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Status
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Custom test
Problems
#
Name
1292A
NEKO's Maze Game
data structures
,
dsu
,
implementation
1400
x13111
1290E
Cartesian Tree
data structures
3300
x516
1290B
Irreducible Anagrams
binary search
,
constructive algorithms
,
data structures
,
strings
,
two pointers
1800
x5122
1290A
Mind Control
brute force
,
data structures
,
implementation
1600
x8467
1288E
Messenger Simulator
data structures
2000
x3497
1287B
Hyperset
brute force
,
data structures
,
implementation
1500
x9358
1286E
Fedya the Potter Strikes Back
data structures
,
strings
3200
x491
1286D
LCC
data structures
,
math
,
matrices
,
probabilities
3100
x563
1286B
Numbers on Tree
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1800
x4595
1285E
Delete a Segment
brute force
,
constructive algorithms
,
data structures
,
dp
,
graphs
,
sortings
,
trees
,
two pointers
2300
x1803
1284F
New Year and Social Network
data structures
,
graph matchings
,
graphs
,
math
,
trees
3200
x315
1284D
New Year and Conference
binary search
,
data structures
,
hashing
,
sortings
2100
x3059
1284B
New Year and Ascent Sequence
binary search
,
combinatorics
,
data structures
,
dp
,
implementation
,
sortings
1400
x10745
1283C
Friends and Gifts
constructive algorithms
,
data structures
,
math
1500
x12992
1282E
The Cake Is a Lie
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
2400
x1134
1279C
Stack of Presents
data structures
,
implementation
1400
x11578
1278D
Segment Tree
data structures
,
dsu
,
graphs
,
trees
2100
x3895
1278C
Berry Jam
data structures
,
dp
,
greedy
,
implementation
1700
x7785
1277D
Let's Play the Words?
data structures
,
hashing
,
implementation
,
math
1900
x3090
1276C
Beautiful Rectangle
brute force
,
combinatorics
,
constructive algorithms
,
data structures
,
greedy
,
math
2300
x1602
1271D
Portals
data structures
,
dp
,
greedy
,
implementation
,
sortings
2100
x2816
1270H
Number of Components
data structures
3300
x595
1268C
K Integers
binary search
,
data structures
2300
x1671
1266E
Spaceship Solitaire
data structures
,
greedy
,
implementation
2100
x2208
1266D
Decreasing Debts
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
math
,
two pointers
2000
x3547
1265E
Beautiful Mirrors
data structures
,
dp
,
math
,
probabilities
2100
x3492
1265B
Beautiful Numbers
data structures
,
implementation
,
math
,
two pointers
1300
x12489
1264C
Beautiful Mirrors with queries
data structures
,
probabilities
2400
x1128
1263F
Economic Difficulties
data structures
,
dfs and similar
,
dp
,
flows
,
graphs
,
trees
2400
x848
1263E
Editor
data structures
,
implementation
2100
x2603
1260F
Colored Tree
data structures
,
trees
2700
x487
1257E
The Contest
data structures
,
dp
,
greedy
2000
x4143
1257D
Yet Another Monster Killing Problem
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
1700
x7380
1254D
Tree Queries
data structures
,
probabilities
,
trees
2700
x1172
1253E
Antenna Coverage
data structures
,
dp
,
greedy
,
sortings
2200
x2770
1252K
Addition Robot
data structures
,
math
,
matrices
2100
x1807
1252G
Performance Review
data structures
2100
x1370
1252D
Find String in a Grid
data structures
,
dp
,
strings
,
trees
3000
x330
1252C
Even Path
data structures
,
implementation
1600
x3637
1251E2
Voting (Hard Version)
binary search
,
data structures
,
greedy
2400
x2539
1251E1
Voting (Easy Version)
data structures
,
dp
,
greedy
2300
x2251
1250C
Trip to Saint Petersburg
data structures
2100
x1294
1249D2
Too Many Segments (hard version)
data structures
,
greedy
,
sortings
1800
x5073
1239C
Queue in the Train
data structures
,
greedy
,
implementation
2300
x1315
1238G
Adilbek and the Watering System
data structures
,
greedy
,
sortings
2700
x399
1237G
Balanced Distribution
data structures
,
dp
,
greedy
3500
x121
1237D
Balanced Playlist
binary search
,
data structures
,
implementation
2000
x4037
1237B
Balanced Tunnel
data structures
,
sortings
,
two pointers
1300
x15108
1236E
Alice and the Unfair Game
binary search
,
data structures
,
dp
,
dsu
2500
x642
1236D
Alice and the Doll
brute force
,
data structures
,
greedy
,
implementation
2300
x1650
1234D
Distinct Characters Queries
data structures
1600
x14453
1234B2
Social Network (hard version)
data structures
,
implementation
1300
x16686
1227D2
Optimal Subsequences (Hard Version)
data structures
,
greedy
1800
x4247
1227D1
Optimal Subsequences (Easy Version)
data structures
,
greedy
1600
x6153
1223F
Stack Exterminable Arrays
data structures
,
divide and conquer
,
dp
,
hashing
2600
x1964
1221F
Choose a Square
binary search
,
data structures
,
sortings
2400
x1008
1220F
Gardener Alex
binary search
,
data structures
2700
x669
1218F
Workout plan
data structures
,
greedy
1500
x2891
1218B
Guarding warehouses
data structures
,
geometry
3000
x70
1217F
Forced Online Queries Problem
data structures
,
divide and conquer
,
dsu
,
graphs
,
trees
2600
x557
1217E
Sum Queries?
data structures
,
greedy
,
implementation
,
math
2300
x1841
1216F
Wi-Fi
data structures
,
dp
,
greedy
2100
x2410
1214G
Feeling Good
bitmasks
,
data structures
3200
x284
1214C
Bad Sequence
data structures
,
greedy
1200
x13047
1213F
Unstable String Sort
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
strings
2100
x2498
1213B
Bad Prices
data structures
,
implementation
1100
x25940
1209H
Moving Walkways
data structures
,
greedy
,
math
3300
x138
1209G2
Into Blocks (hard version)
data structures
3200
x395
1209G1
Into Blocks (easy version)
data structures
,
dsu
,
greedy
,
implementation
,
two pointers
2000
x3085
1209F
Koala and Notebook
data structures
,
dfs and similar
,
graphs
,
shortest paths
,
strings
,
trees
2600
x1109
1208H
Red Blue Tree
data structures
,
implementation
,
trees
3500
x145
1208E
Let Them Slide
data structures
,
implementation
2200
x1966
1208D
Restore Permutation
binary search
,
data structures
,
greedy
,
implementation
1900
x4808
1207G
Indie Album
data structures
,
dfs and similar
,
hashing
,
string suffix structures
,
strings
,
trees
2700
x975
1207F
Remainder Problem
brute force
,
data structures
,
implementation
2100
x4929
1204D2
Kirk and a Binary String (hard version)
data structures
,
greedy
,
math
,
strings
2100
x3056
1202C
You Are Given a WASD-string...
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
strings
2100
x2491
1200F
Graph Traveler
brute force
,
data structures
,
dfs and similar
,
dp
,
graphs
,
implementation
,
math
,
number theory
2300
x1050
1200D
White Lines
brute force
,
data structures
,
dp
,
implementation
,
two pointers
1900
x4073
1200A
Hotelier
brute force
,
data structures
,
implementation
800
x20120
1198B
Welfare State
binary search
,
brute force
,
data structures
,
sortings
1600
x9351
1197E
Culture Code
binary search
,
combinatorics
,
data structures
,
dp
,
shortest paths
,
sortings
2300
x1610
1196D2
RGB Substring (hard version)
data structures
,
dp
,
implementation
,
two pointers
1600
x9529
1195F
Geometers Anonymous Club
data structures
,
geometry
,
math
,
sortings
2500
x734
1195E
OpenStreetMap
data structures
,
two pointers
2100
x2954
1194E
Count The Rectangles
bitmasks
,
brute force
,
data structures
,
geometry
,
sortings
2200
x1898
1193B
Magic Tree
*special problem
,
data structures
,
dp
,
trees
x421
1192B
Dynamic Diameter
*special problem
,
data structures
,
dfs and similar
,
divide and conquer
,
trees
x1034
1190D
Tokitsukaze and Strange Rectangle
data structures
,
divide and conquer
,
sortings
,
two pointers
2000
x2226
1189C
Candies!
data structures
,
dp
,
implementation
,
math
1400
x10464
1187D
Subarray Sorting
data structures
,
sortings
2400
x2480
1185C2
Exam in BerSU (hard version)
brute force
,
data structures
,
greedy
,
math
1700
x7225
1184E3
Daleks' Invasion (hard)
data structures
,
dsu
,
graphs
,
trees
2400
x495
1184C2
Heidi and the Turing Test (Medium)
data structures
2200
x603
1182F
Maximum Sine
binary search
,
data structures
,
number theory
2700
x332
1182C
Beautiful Lyrics
data structures
,
greedy
,
strings
1700
x4388
1181D
Irrigation
binary search
,
data structures
,
implementation
,
sortings
,
trees
,
two pointers
2200
x2092
1179D
Fedor Runs for President
data structures
,
dp
,
trees
2700
x786
1179C
Serge and Dining Room
binary search
,
data structures
,
graph matchings
,
greedy
,
implementation
,
math
,
trees
2200
x1973
1179A
Valeriy and Deque
data structures
,
implementation
1500
x10224
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