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Educational Codeforces Round 195 (Rated for Div. 2)
07:40:43
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combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
communication
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
1159B
Expansion coefficient of the array
implementation
,
math
1300
x7894
1158A
The Party and Sweets
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
,
two pointers
1500
x8669
1157C1
Increasing Subsequence (easy version)
greedy
1300
x13770
1157B
Long Number
greedy
1300
x16055
1157A
Reachable Numbers
implementation
1100
x16741
1156A
Inscribed Figures
geometry
1400
x8945
1155C
Alarm Clocks Everywhere
math
,
number theory
1300
x9869
1155B
Game with Telephone Numbers
games
,
greedy
,
implementation
1200
x12836
1154D
Walking Robot
greedy
1500
x10711
1154C
Gourmet Cat
implementation
,
math
1400
x11685
1154B
Make Them Equal
math
1200
x17969
1153B
Serval and Toy Bricks
constructive algorithms
,
greedy
1200
x9443
1152B
Neko Performs Cat Furrier Transform
bitmasks
,
constructive algorithms
,
dfs and similar
,
math
1300
x9574
1149A
Prefix Sum Primes
constructive algorithms
,
greedy
,
math
,
number theory
1200
x18387
1147A
Hide and Seek
graphs
1500
x5652
1146B
Hate "A"
implementation
,
strings
1100
x9477
1144D
Equalize Them All
constructive algorithms
,
greedy
1400
x10942
1143C
Queen
dfs and similar
,
trees
1400
x19292
1143B
Nirvana
brute force
,
math
,
number theory
1200
x11818
1141D
Colored Boots
greedy
,
implementation
1500
x9072
1141C
Polycarp Restores Permutation
math
1500
x12443
1140D
Minimum Triangulation
dp
,
greedy
,
math
1200
x13356
1140B
Good String
implementation
,
strings
1200
x11808
1139C
Edgy Trees
dfs and similar
,
dsu
,
graphs
,
math
,
trees
1500
x17993
1136C
Nastya Is Transposing Matrices
constructive algorithms
,
sortings
1500
x8066
1133D
Zero Quantity Maximization
hashing
,
math
,
number theory
1500
x17888
1133C
Balanced Team
sortings
,
two pointers
1200
x29708
1133B
Preparation for International Women's Day
math
,
number theory
1200
x14636
1132A
Regular Bracket Sequence
greedy
,
implementation
1100
x10258
1131C
Birthday
binary search
,
greedy
,
sortings
1200
x15847
1131B
Draw!
greedy
,
implementation
1400
x10451
1130C
Connect
brute force
,
dfs and similar
,
dsu
1400
x9604
1130B
Two Cakes
greedy
1200
x8507
1121B
Mike and Children
brute force
,
implementation
1200
x10238
1121A
Technogoblet of Fire
implementation
,
sortings
1100
x7535
1119C
Ramesses and Corner Inversion
constructive algorithms
,
greedy
,
implementation
,
math
1500
x7300
1119B
Alyona and a Narrow Fridge
binary search
,
flows
,
greedy
,
sortings
1300
x18284
1119A
Ilya and a Colorful Walk
greedy
,
implementation
1100
x11858
1118B
Tanya and Candies
implementation
1200
x13495
1117A
Best Subsegment
implementation
,
math
1100
x11615
1115U1
Anti-diagonal unitary
*special problem
1500
x271
1115G1
AND oracle
*special problem
1100
x404
1114B
Yet Another Array Partitioning Task
constructive algorithms
,
greedy
,
sortings
1500
x9488
1113B
Sasha and Magnetic Machines
greedy
,
number theory
1300
x8391
1110C
Meaningless Operations
constructive algorithms
,
math
,
number theory
1500
x10164
1110B
Tape
greedy
,
sortings
1400
x18218
1108D
Diverse Garland
constructive algorithms
,
dp
,
greedy
1400
x16704
1108C
Nice Garland
brute force
,
greedy
,
math
1300
x12854
1108B
Divisors of Two Integers
brute force
,
greedy
,
math
,
number theory
1100
x25662
1107C
Brutality
greedy
,
sortings
,
two pointers
1300
x11118
1106D
Lunar New Year and a Wander
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1500
x21423
1106B
Lunar New Year and Food Ordering
data structures
,
implementation
1500
x7045
1105C
Ayoub and Lost Array
combinatorics
,
dp
,
math
1500
x11912
1105B
Zuhair and Strings
brute force
,
implementation
,
strings
1100
x10639
1105A
Salem and Sticks
brute force
,
implementation
1100
x11665
1104B
Game with string
data structures
,
implementation
,
math
1200
x17466
1103A
Grid game
constructive algorithms
,
implementation
1400
x10747
1102D
Balanced Ternary String
greedy
,
strings
1500
x8656
1102C
Doors Breaking and Repairing
games
1200
x14416
1102B
Array K-Coloring
greedy
,
sortings
1400
x11257
1101E
Polycarp's New Job
implementation
1500
x8304
1101C
Division and Union
sortings
1500
x13321
1101B
Accordion
greedy
,
implementation
1300
x11197
1100C
NN and the Optical Illusion
binary search
,
geometry
,
math
1200
x11018
1100B
Build a Contest
data structures
,
implementation
1300
x11931
1099C
Postcard
constructive algorithms
,
implementation
1200
x10541
1099B
Squares and Segments
binary search
,
constructive algorithms
,
math
1100
x11610
1097C
Yuhao and a Parenthesis
greedy
,
implementation
1400
x8869
1097B
Petr and a Combination Lock
bitmasks
,
brute force
,
dp
1200
x38054
1096B
Substring Removal
combinatorics
,
math
,
strings
1300
x12029
1095C
Powers Of Two
bitmasks
,
greedy
1400
x20417
1093C
Mishka and the Last Exam
greedy
1300
x9783
1091C
New Year and the Sphere Transmission
math
,
number theory
1400
x10674
1091B
New Year and the Treasure Geolocation
brute force
,
constructive algorithms
,
greedy
,
implementation
1200
x11080
1090A
Company Merging
greedy
1300
x4993
1089G
Guest Student
math
1500
x3281
1088C
Ehab and a 2-operation task
constructive algorithms
,
greedy
,
math
1400
x8568
1085B
Div Times Mod
math
1100
x10375
1084C
The Fair Nut and String
combinatorics
,
dp
,
implementation
1500
x12894
1084B
Kvass and the Fair Nut
greedy
,
implementation
1200
x8362
1082A
Vasya and Book
implementation
,
math
1200
x9496
1081C
Colorful Bricks
combinatorics
,
dp
,
math
1500
x8858
1081B
Farewell Party
constructive algorithms
,
implementation
1500
x4724
1080C
Masha and two friends
implementation
1500
x4258
1077C
Good Array
1300
x28124
1076C
Meme Problem
binary search
,
math
1300
x13660
1076B
Divisor Subtraction
implementation
,
math
,
number theory
1200
x14990
1076A
Minimizing the String
greedy
,
strings
1200
x14426
1075B
Taxi drivers and Lyft
implementation
,
sortings
1200
x4627
1070K
Video Posts
implementation
1100
x5455
1070H
BerOS File Suggestion
brute force
,
implementation
1500
x3884
1070F
Debate
greedy
1500
x3880
1070D
Garbage Disposal
greedy
1300
x5273
1068B
LCM
math
,
number theory
1200
x13421
1068A
Birthday
math
1400
x7371
1066C
Books Queries
implementation
1400
x10477
1066B
Heaters
greedy
,
two pointers
1500
x9531
1066A
Vova and Train
math
1100
x15699
1065B
Vasya and Isolated Vertices
constructive algorithms
,
graphs
1300
x11779
1064B
Equations of Mathematical Magic
math
1200
x8073
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