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Codeforces Round 986 (Div. 2)
05:27:42
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Difficulty:
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brute force
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
1264B
Beautiful Sequence
brute force
,
constructive algorithms
,
greedy
1900
x5827
1260E
Tournament
brute force
,
dp
,
greedy
2400
x1725
1257F
Make Them Similar
bitmasks
,
brute force
,
hashing
,
meet-in-the-middle
2400
x2035
1252J
Tiling Terrace
brute force
,
dp
2300
x724
1251A
Broken Keyboard
brute force
,
strings
,
two pointers
1000
x19723
1250I
Show Must Go On
binary search
,
brute force
,
greedy
,
shortest paths
3100
x135
1250F
Data Center
brute force
,
implementation
800
x7398
1250B
The Feast and the Bus
brute force
,
constructive algorithms
,
greedy
,
math
1800
x2617
1249C1
Good Numbers (easy version)
brute force
,
greedy
,
implementation
1300
x15599
1248D1
The World Is Just a Programming Task (Easy Version)
brute force
,
dp
,
greedy
,
implementation
2000
x2401
1245F
Daniel and Spring Cleaning
bitmasks
,
brute force
,
combinatorics
,
dp
2300
x2008
1244D
Paint the Tree
brute force
,
constructive algorithms
,
dp
,
graphs
,
implementation
,
trees
1800
x7612
1244C
The Football Season
brute force
,
math
,
number theory
2000
x7655
1244B
Rooms and Staircases
brute force
,
implementation
1000
x15900
1236D
Alice and the Doll
brute force
,
data structures
,
greedy
,
implementation
2300
x1673
1236A
Stones
brute force
,
greedy
,
math
800
x16471
1230A
Dawid and Bags of Candies
brute force
,
implementation
800
x21671
1228D
Complete Tripartite
brute force
,
constructive algorithms
,
graphs
,
hashing
,
implementation
1900
x5226
1228A
Distinct Digits
brute force
,
implementation
800
x21836
1225C
p-binary
bitmasks
,
brute force
,
math
1600
x9020
1221G
Graph And Numbers
bitmasks
,
brute force
,
combinatorics
,
dp
,
meet-in-the-middle
2900
x764
1221A
2048 Game
brute force
,
greedy
,
math
1000
x16969
1217C
The Number Of Good Substrings
binary search
,
bitmasks
,
brute force
1700
x7475
1216E1
Numerical Sequence (easy version)
binary search
,
brute force
,
math
1900
x3458
1214B
Badges
brute force
,
math
1100
x10876
1214A
Optimal Currency Exchange
brute force
,
math
1400
x9122
1213E
Two Small Strings
brute force
,
constructive algorithms
1900
x5201
1213D2
Equalizing by Division (hard version)
brute force
,
math
,
sortings
1600
x11476
1213D1
Equalizing by Division (easy version)
brute force
,
implementation
1500
x11427
1210F2
Marek and Matching (hard version)
brute force
,
probabilities
3200
x215
1210F1
Marek and Matching (easy version)
brute force
,
probabilities
3100
x206
1210B
Marcin and Training Camp
brute force
,
greedy
1700
x5831
1210A
Anadi and Domino
brute force
,
graphs
1700
x5172
1209E1
Rotate Columns (easy version)
bitmasks
,
brute force
,
dp
,
greedy
,
sortings
2000
x2984
1208B
Uniqueness
binary search
,
brute force
,
implementation
,
two pointers
1500
x10586
1207F
Remainder Problem
brute force
,
data structures
,
implementation
2100
x5348
1207A
There Are Two Types Of Burgers
brute force
,
greedy
,
implementation
,
math
800
x21949
1205B
Shortest Cycle
bitmasks
,
brute force
,
graphs
,
shortest paths
1900
x6707
1204D1
Kirk and a Binary String (easy version)
brute force
,
greedy
,
strings
2000
x3083
1202E
You Are Given Some Strings...
brute force
,
string suffix structures
,
strings
2400
x2143
1202C
You Are Given a WASD-string...
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
strings
2100
x2577
1202B
You Are Given a Decimal String...
brute force
,
dp
,
shortest paths
1700
x4577
1200F
Graph Traveler
brute force
,
data structures
,
dfs and similar
,
dp
,
graphs
,
implementation
,
math
,
number theory
2300
x1082
1200E
Compress Words
brute force
,
hashing
,
implementation
,
string suffix structures
,
strings
2000
x7778
1200D
White Lines
brute force
,
data structures
,
dp
,
implementation
,
two pointers
1900
x4142
1200A
Hotelier
brute force
,
data structures
,
implementation
800
x20459
1198B
Welfare State
binary search
,
brute force
,
data structures
,
sortings
1600
x9494
1196F
K-th Path
brute force
,
constructive algorithms
,
shortest paths
,
sortings
2200
x2666
1196A
Three Piles of Candies
brute force
,
constructive algorithms
,
math
800
x27814
1195B
Sport Mafia
binary search
,
brute force
,
math
1000
x19933
1194E
Count The Rectangles
bitmasks
,
brute force
,
data structures
,
geometry
,
sortings
2200
x1935
1192C
Cubeword
*special problem
,
brute force
,
dp
,
meet-in-the-middle
x331
1191B
Tokitsukaze and Mahjong
brute force
,
implementation
1200
x9614
1191A
Tokitsukaze and Enhancement
brute force
800
x18191
1190C
Tokitsukaze and Duel
brute force
,
games
,
greedy
2300
x2028
1185F
Two Pizzas
bitmasks
,
brute force
2100
x2051
1185E
Polycarp and Snakes
brute force
,
implementation
2000
x2661
1185C2
Exam in BerSU (hard version)
brute force
,
data structures
,
greedy
,
math
1700
x7474
1184A2
Heidi Learns Hashing (Medium)
brute force
,
number theory
2100
x995
1184A1
Heidi Learns Hashing (Easy)
brute force
,
math
,
number theory
1200
x5976
1183F
Topforces Strikes Back
brute force
,
math
,
sortings
2100
x2028
1181E2
A Story of One Country (Hard)
brute force
,
greedy
,
sortings
3000
x287
1181E1
A Story of One Country (Easy)
brute force
,
divide and conquer
,
sortings
2500
x482
1181C
Flag
brute force
,
combinatorics
,
dp
,
implementation
1900
x3153
1178E
Archaeology
brute force
,
constructive algorithms
,
greedy
,
strings
1900
x4336
1176A
Divide it!
brute force
,
greedy
,
implementation
800
x22998
1175F
The Number of Subpermutations
brute force
,
data structures
,
divide and conquer
,
hashing
,
math
2500
x1923
1175C
Electrification
binary search
,
brute force
,
greedy
1600
x6834
1168B
Good Triple
brute force
,
two pointers
1900
x3576
1167G
Low Budget Inception
brute force
,
geometry
3100
x150
1167B
Lost Numbers
brute force
,
divide and conquer
,
interactive
,
math
1400
x11820
1167A
Telephone Number
brute force
,
greedy
,
strings
800
x19372
1166E
The LCMs Must be Large
bitmasks
,
brute force
,
constructive algorithms
,
math
,
number theory
2100
x2838
1166D
Cute Sequences
binary search
,
brute force
,
greedy
,
math
2200
x2174
1163E
Magical Permutation
bitmasks
,
brute force
,
constructive algorithms
,
data structures
,
graphs
,
math
2400
x686
1163C1
Power Transmission (Easy Edition)
brute force
,
geometry
1900
x3331
1162B
Double Matrix
brute force
,
greedy
1400
x5817
1157G
Inverse of Rows and Columns
brute force
,
constructive algorithms
2200
x927
1155F
Delivery Oligopoly
brute force
,
dp
,
graphs
2800
x419
1155E
Guess the Root
brute force
,
interactive
,
math
2200
x1441
1155D
Beautiful Array
brute force
,
data structures
,
divide and conquer
,
dp
,
greedy
1900
x6954
1154G
Minimum Possible LCM
brute force
,
greedy
,
math
,
number theory
2200
x2800
1153E
Serval and Snake
binary search
,
brute force
,
interactive
2200
x1500
1153A
Serval and Bus
brute force
,
math
1000
x11517
1152C
Neko does Maths
brute force
,
math
,
number theory
1800
x6706
1151B
Dima and a Bad XOR
bitmasks
,
brute force
,
constructive algorithms
,
dp
1600
x11262
1151A
Maxim and Biology
brute force
,
strings
1000
x11228
1149D
Abandoning Roads
brute force
,
dp
,
graphs
,
greedy
3000
x788
1148B
Born This Way
binary search
,
brute force
,
two pointers
1600
x7512
1147B
Chladni Figure
brute force
,
strings
1900
x2889
1145C
Mystery Circuit
bitmasks
,
brute force
x805
1145B
Kanban Numbers
brute force
x1457
1143B
Nirvana
brute force
,
math
,
number theory
1200
x10570
1142A
The Beatles
brute force
,
math
1700
x3428
1140C
Playlist
brute force
,
data structures
,
sortings
1600
x9608
1138B
Circus
brute force
,
greedy
,
math
,
strings
1800
x4032
1132C
Painting the Fence
brute force
1700
x5447
1130C
Connect
brute force
,
dfs and similar
,
dsu
1400
x8634
1129A2
Toy Train
brute force
,
greedy
1800
x4110
1129A1
Toy Train (Simplified)
brute force
,
greedy
1700
x3831
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