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Codeforces Round 977 (Div. 2)
2 days
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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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Custom test
Problems
#
Name
1214B
Badges
brute force
,
math
1100
x10842
1213C
Book Reading
math
1200
x18434
1213B
Bad Prices
data structures
,
implementation
1100
x26604
1209B
Koala and Lights
implementation
,
math
,
number theory
1300
x8163
1207B
Square Filling
constructive algorithms
,
greedy
,
implementation
1200
x13256
1205A
Almost Equal
constructive algorithms
,
greedy
,
math
1200
x14143
1203C
Common Divisors
implementation
,
math
1300
x20592
1203B
Equal Rectangles
greedy
,
math
1200
x15972
1202A
You Are Given Two Binary Strings...
bitmasks
,
greedy
1100
x9344
1200B
Block Adventure
dp
,
greedy
1200
x13970
1196B
Odd Sum Segments
constructive algorithms
,
math
1200
x16608
1194C
From S To T
implementation
,
strings
1300
x13200
1194B
Yet Another Crosses Problem
implementation
1300
x10301
1191B
Tokitsukaze and Mahjong
brute force
,
implementation
1200
x9602
1189B
Number Circle
greedy
,
math
,
sortings
1100
x14216
1187B
Letters Shop
binary search
,
implementation
,
strings
1300
x12181
1185C1
Exam in BerSU (easy version)
greedy
,
sortings
1200
x11383
1185B
Email from Polycarp
implementation
,
strings
1200
x13392
1184A1
Heidi Learns Hashing (Easy)
brute force
,
math
,
number theory
1200
x5947
1182B
Plus from Picture
dfs and similar
,
implementation
,
strings
1300
x11140
1178C
Tiles
combinatorics
,
greedy
,
math
1300
x11933
1178B
WOW Factor
dp
,
strings
1300
x15282
1176C
Lose it!
dp
,
greedy
,
implementation
1300
x14204
1176B
Merge it!
math
1100
x17105
1174C
Ehab and a Special Coloring Problem
constructive algorithms
,
number theory
1300
x11995
1174B
Ehab Is an Odd Person
sortings
1200
x15445
1173B
Nauuo and Chess
constructive algorithms
,
greedy
1100
x9069
1166B
All the Vowels Please
constructive algorithms
,
math
,
number theory
1100
x11472
1165C
Good String
greedy
1300
x12928
1165A
Remainder
implementation
,
math
1100
x13777
1159B
Expansion coefficient of the array
implementation
,
math
1300
x7054
1157C1
Increasing Subsequence (easy version)
greedy
1300
x12621
1157B
Long Number
greedy
1300
x14691
1157A
Reachable Numbers
implementation
1100
x15648
1155C
Alarm Clocks Everywhere
math
,
number theory
1300
x9229
1155B
Game with Telephone Numbers
games
,
greedy
,
implementation
1200
x11883
1154B
Make Them Equal
math
1200
x16603
1153B
Serval and Toy Bricks
constructive algorithms
,
greedy
1200
x9073
1152B
Neko Performs Cat Furrier Transform
bitmasks
,
constructive algorithms
,
dfs and similar
,
math
1300
x8903
1149A
Prefix Sum Primes
constructive algorithms
,
greedy
,
math
,
number theory
1200
x15191
1146B
Hate "A"
implementation
,
strings
1100
x8583
1143B
Nirvana
brute force
,
math
,
number theory
1200
x10499
1140D
Minimum Triangulation
dp
,
greedy
,
math
1200
x12581
1140B
Good String
implementation
,
strings
1200
x11301
1133C
Balanced Team
sortings
,
two pointers
1200
x22864
1133B
Preparation for International Women's Day
math
,
number theory
1200
x12758
1132A
Regular Bracket Sequence
greedy
,
implementation
1100
x9582
1131C
Birthday
binary search
,
greedy
,
sortings
1200
x14815
1130B
Two Cakes
greedy
1200
x7912
1121B
Mike and Children
brute force
,
implementation
1200
x8968
1121A
Technogoblet of Fire
implementation
,
sortings
1100
x7185
1119B
Alyona and a Narrow Fridge
binary search
,
flows
,
greedy
,
sortings
1300
x11035
1119A
Ilya and a Colorful Walk
greedy
,
implementation
1100
x10770
1118B
Tanya and Candies
implementation
1200
x12151
1117A
Best Subsegment
implementation
,
math
1100
x11014
1115G1
AND oracle
*special problem
1100
x388
1113B
Sasha and Magnetic Machines
greedy
,
number theory
1300
x7738
1108C
Nice Garland
brute force
,
greedy
,
math
1300
x11966
1108B
Divisors of Two Integers
brute force
,
greedy
,
math
,
number theory
1100
x23173
1107C
Brutality
greedy
,
sortings
,
two pointers
1300
x9947
1105B
Zuhair and Strings
brute force
,
implementation
,
strings
1100
x9897
1105A
Salem and Sticks
brute force
,
implementation
1100
x10941
1104B
Game with string
data structures
,
implementation
,
math
1200
x14852
1102C
Doors Breaking and Repairing
games
1200
x13061
1101B
Accordion
greedy
,
implementation
1300
x10484
1100C
NN and the Optical Illusion
binary search
,
geometry
,
math
1200
x10089
1100B
Build a Contest
data structures
,
implementation
1300
x11152
1099C
Postcard
constructive algorithms
,
implementation
1200
x9621
1099B
Squares and Segments
binary search
,
constructive algorithms
,
math
1100
x11115
1097B
Petr and a Combination Lock
bitmasks
,
brute force
,
dp
1200
x28618
1096B
Substring Removal
combinatorics
,
math
,
strings
1300
x10586
1093C
Mishka and the Last Exam
greedy
1300
x9351
1091B
New Year and the Treasure Geolocation
brute force
,
constructive algorithms
,
greedy
,
implementation
1200
x10664
1090A
Company Merging
greedy
1300
x4162
1085B
Div Times Mod
math
1100
x9289
1084B
Kvass and the Fair Nut
greedy
,
implementation
1200
x7807
1082A
Vasya and Book
implementation
,
math
1200
x8556
1077C
Good Array
1300
x17250
1076C
Meme Problem
binary search
,
math
1300
x12449
1076B
Divisor Subtraction
implementation
,
math
,
number theory
1200
x12955
1076A
Minimizing the String
greedy
,
strings
1200
x13115
1075B
Taxi drivers and Lyft
implementation
,
sortings
1200
x4246
1070K
Video Posts
implementation
1100
x4886
1070D
Garbage Disposal
greedy
1300
x4901
1068B
LCM
math
,
number theory
1200
x11514
1066A
Vova and Train
math
1100
x14533
1065B
Vasya and Isolated Vertices
constructive algorithms
,
graphs
1300
x10902
1064B
Equations of Mathematical Magic
math
1200
x7529
1063A
Oh Those Palindromes
constructive algorithms
,
strings
1300
x10348
1062A
A Prank
greedy
,
implementation
1300
x8799
1060B
Maximum Sum of Digits
greedy
1100
x8915
1059B
Forgery
implementation
1300
x7018
1055B
Alice and Hairdresser
dsu
,
implementation
1300
x4996
1051A
Vasya And Password
greedy
,
implementation
,
strings
1200
x8416
1043B
Lost Array
implementation
1200
x6277
1042B
Vitamins
bitmasks
,
brute force
,
dp
,
implementation
1200
x16035
1042A
Benches
binary search
,
implementation
1100
x12877
1040B
Shashlik Cooking
dp
,
greedy
,
math
1300
x7066
1038C
Gambling
greedy
,
sortings
1300
x9427
1038B
Non-Coprime Partition
constructive algorithms
,
math
1100
x13553
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