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Codeforces Round 959 sponsored by NEAR (Div. 1 + Div. 2)
00:21:40
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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
1216E1
Numerical Sequence (easy version)
binary search
,
brute force
,
math
1900
x3401
1216C
White Sheet
geometry
,
math
1700
x9085
1215F
Radio Stations
2-sat
2700
x947
1215E
Marbles
bitmasks
,
dp
2200
x2947
1215D
Ticket Game
games
,
greedy
,
math
1700
x6035
1214H
Tiles Placement
constructive algorithms
,
dfs and similar
,
trees
2800
x378
1214G
Feeling Good
bitmasks
,
data structures
3200
x286
1214F
Employment
greedy
,
sortings
2700
x426
1214E
Petya and Construction Set
constructive algorithms
,
graphs
,
math
,
sortings
,
trees
2000
x2664
1214D
Treasure Island
dfs and similar
,
dp
,
flows
,
hashing
1900
x5128
1213G
Path Queries
divide and conquer
,
dsu
,
graphs
,
sortings
,
trees
1800
x6971
1213F
Unstable String Sort
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
strings
2100
x2539
1213E
Two Small Strings
brute force
,
constructive algorithms
1900
x5109
1211I
Unusual Graph
*special problem
,
graphs
3000
x36
1211H
Road Repair in Treeland
*special problem
,
binary search
,
dp
,
trees
3100
x44
1211G
King's Path
*special problem
,
math
,
trees
2500
x70
1211F
kotlinkotlinkotlinkotlin...
*special problem
,
graphs
,
implementation
,
strings
2300
x120
1211E
Double Permutation Inc.
*special problem
,
binary search
,
greedy
2000
x191
1211D
Teams
*special problem
,
binary search
,
greedy
,
math
2000
x227
1211C
Ice Cream
*special problem
,
greedy
,
sortings
1700
x483
1210G
Mateusz and Escape Room
dp
3500
x158
1210F2
Marek and Matching (hard version)
brute force
,
probabilities
3200
x193
1210F1
Marek and Matching (easy version)
brute force
,
probabilities
3100
x190
1210E
Wojtek and Card Tricks
math
2700
x393
1210D
Konrad and Company Evaluation
graphs
2400
x1440
1210C
Kamil and Making a Stream
math
,
number theory
,
trees
2000
x3237
1210B
Marcin and Training Camp
brute force
,
greedy
1700
x5678
1210A
Anadi and Domino
brute force
,
graphs
1700
x5131
1209H
Moving Walkways
data structures
,
greedy
,
math
3300
x139
1209G2
Into Blocks (hard version)
data structures
3200
x419
1209G1
Into Blocks (easy version)
data structures
,
dsu
,
greedy
,
implementation
,
two pointers
2000
x3122
1209F
Koala and Notebook
data structures
,
dfs and similar
,
graphs
,
shortest paths
,
strings
,
trees
2600
x1115
1209E2
Rotate Columns (hard version)
bitmasks
,
dp
,
greedy
,
sortings
2500
x1882
1209E1
Rotate Columns (easy version)
bitmasks
,
brute force
,
dp
,
greedy
,
sortings
2000
x2903
1209D
Cow and Snacks
dfs and similar
,
dsu
,
graphs
1700
x9095
1208H
Red Blue Tree
data structures
,
implementation
,
trees
3500
x146
1208G
Polygons
greedy
,
math
,
number theory
2800
x739
1208F
Bits And Pieces
bitmasks
,
dfs and similar
,
dp
,
greedy
2600
x2227
1208E
Let Them Slide
data structures
,
implementation
2200
x2006
1208D
Restore Permutation
binary search
,
data structures
,
greedy
,
implementation
1900
x4828
1208C
Magic Grid
constructive algorithms
1800
x5970
1207G
Indie Album
data structures
,
dfs and similar
,
hashing
,
string suffix structures
,
strings
,
trees
2700
x986
1207F
Remainder Problem
brute force
,
data structures
,
implementation
2100
x5024
1207E
XOR Guessing
bitmasks
,
interactive
,
math
1900
x5830
1207D
Number Of Permutations
combinatorics
1800
x6020
1205F
Beauty of a Permutation
constructive algorithms
,
math
3400
x122
1205E
Expected Value Again
combinatorics
,
strings
3100
x273
1205D
Almost All
constructive algorithms
,
trees
2700
x633
1205C
Palindromic Paths
implementation
,
interactive
2400
x1146
1205B
Shortest Cycle
bitmasks
,
brute force
,
graphs
,
shortest paths
1900
x6546
1204E
Natasha, Sasha and the Prefix Sums
combinatorics
,
dp
,
math
,
number theory
2300
x1633
1204D2
Kirk and a Binary String (hard version)
data structures
,
greedy
,
math
,
strings
2100
x3211
1204D1
Kirk and a Binary String (easy version)
brute force
,
greedy
,
strings
2000
x3044
1204C
Anna, Svyatoslav and Maps
dp
,
graphs
,
greedy
,
shortest paths
1700
x6637
1203F2
Complete the Projects (hard version)
dp
,
greedy
2300
x2805
1203F1
Complete the Projects (easy version)
greedy
2100
x3465
1203D2
Remove the Substring (hard version)
binary search
,
greedy
,
implementation
,
two pointers
1700
x7247
1202F
You Are Given Some Letters...
binary search
,
implementation
,
math
2700
x386
1202E
You Are Given Some Strings...
brute force
,
string suffix structures
,
strings
2400
x1997
1202D
Print a 1337-string...
combinatorics
,
constructive algorithms
,
math
,
strings
1900
x5051
1202C
You Are Given a WASD-string...
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
strings
2100
x2505
1202B
You Are Given a Decimal String...
brute force
,
dp
,
shortest paths
1700
x4535
1201E2
Knightmare (hard)
graphs
,
interactive
,
shortest paths
3000
x143
1201E1
Knightmare (easy)
graphs
,
interactive
,
shortest paths
2900
x127
1201D
Treasure Hunting
binary search
,
dp
,
greedy
,
implementation
2100
x2324
1200F
Graph Traveler
brute force
,
data structures
,
dfs and similar
,
dp
,
graphs
,
implementation
,
math
,
number theory
2300
x1057
1200E
Compress Words
brute force
,
hashing
,
implementation
,
string suffix structures
,
strings
2000
x7295
1200D
White Lines
brute force
,
data structures
,
dp
,
implementation
,
two pointers
1900
x4087
1198F
GCD Groups 2
greedy
,
number theory
,
probabilities
2900
x845
1198E
Rectangle Painting 2
flows
,
graph matchings
,
graphs
2500
x1167
1198D
Rectangle Painting 1
dp
2300
x3148
1198C
Matching vs Independent Set
constructive algorithms
,
graphs
,
greedy
,
sortings
2000
x3471
1197F
Coloring Game
dp
,
games
,
matrices
2700
x245
1197E
Culture Code
binary search
,
combinatorics
,
data structures
,
dp
,
shortest paths
,
sortings
2300
x1618
1197D
Yet Another Subarray Problem
dp
,
greedy
,
math
1900
x5295
1196F
K-th Path
brute force
,
constructive algorithms
,
shortest paths
,
sortings
2200
x2490
1196E
Connected Component on a Chessboard
constructive algorithms
,
implementation
1800
x3682
1195F
Geometers Anonymous Club
data structures
,
geometry
,
math
,
sortings
2500
x848
1195E
OpenStreetMap
data structures
,
two pointers
2100
x2971
1195D2
Submarine in the Rybinsk Sea (hard edition)
combinatorics
,
math
,
number theory
1800
x4616
1194G
Another Meme Problem
dp
2700
x237
1194F
Crossword Expert
combinatorics
,
dp
,
number theory
,
probabilities
,
two pointers
2400
x980
1194E
Count The Rectangles
bitmasks
,
brute force
,
data structures
,
geometry
,
sortings
2200
x1907
1194D
1-2-K Game
games
,
math
1700
x6418
1190F
Tokitsukaze and Powers
number theory
,
probabilities
3400
x92
1190E
Tokitsukaze and Explosion
binary search
,
greedy
3100
x225
1190D
Tokitsukaze and Strange Rectangle
data structures
,
divide and conquer
,
sortings
,
two pointers
2000
x2237
1190C
Tokitsukaze and Duel
brute force
,
games
,
greedy
2300
x1945
1190B
Tokitsukaze, CSL and Stone Game
games
1800
x6370
1188E
Problem from Red Panda
combinatorics
3300
x227
1188D
Make Equal
dp
3100
x675
1188C
Array Beauty
dp
2500
x1734
1188B
Count Pairs
math
,
matrices
,
number theory
,
two pointers
2300
x4407
1188A2
Add on a Tree: Revolution
constructive algorithms
,
dfs and similar
,
implementation
,
trees
2500
x1219
1187G
Gang Up
flows
,
graphs
2500
x507
1187F
Expected Square Beauty
dp
,
math
,
probabilities
2500
x855
1187E
Tree Painting
dfs and similar
,
dp
,
trees
2100
x7877
1187D
Subarray Sorting
data structures
,
sortings
2400
x2513
1187C
Vasya And Array
constructive algorithms
,
greedy
,
implementation
1800
x6292
1186F
Vus the Cossack and a Graph
dfs and similar
,
graphs
,
greedy
,
implementation
2400
x762
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