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Codeforces Round (Div. 2)
5 days
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*combine tags by OR
greedy
implementation
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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Custom test
Problems
#
Name
1040A
Palindrome Dance
greedy
1000
x9417
1033A
King Escape
dfs and similar
,
graphs
,
implementation
1000
x13405
1029B
Creating the Contest
dp
,
greedy
,
math
1200
x16712
1027B
Numbers on the Chessboard
implementation
,
math
1200
x8320
1027A
Palindromic Twist
implementation
,
strings
1000
x15960
1023C
Bracket Subsequence
greedy
1200
x9767
1023A
Single Wildcard Pattern Matching
brute force
,
implementation
,
strings
1200
x8619
1017B
The Bits
implementation
,
math
1200
x9087
1015B
Obtaining the String
implementation
1200
x11486
1013B
And
greedy
1200
x7541
1011B
Planning The Expedition
binary search
,
brute force
,
implementation
1200
x9979
1008B
Turn the Rectangles
greedy
,
sortings
1000
x11330
1006B
Polycarp's Practice
greedy
,
implementation
,
sortings
1200
x13035
1000A
Codehorses T-shirts
greedy
,
implementation
1200
x8655
999C
Alphabetic Removals
implementation
1200
x17851
998B
Cutting
dp
,
greedy
,
sortings
1200
x12925
998A
Balloons
constructive algorithms
,
implementation
1000
x9421
991A
If at first you don't succeed...
implementation
1000
x10461
990B
Micro-World
greedy
,
sortings
1200
x8021
990A
Commentary Boxes
implementation
,
math
1000
x10512
985B
Switches and Lamps
implementation
1200
x7354
985A
Chess Placing
implementation
1100
x8105
984B
Minesweeper
implementation
1100
x7323
978C
Letters
binary search
,
implementation
,
two pointers
1000
x25050
975B
Mancala
brute force
,
implementation
1100
x6791
967A
Mind the Gap
implementation
1100
x4339
961B
Lecture Sleep
data structures
,
dp
,
implementation
,
two pointers
1200
x20189
960A
Check the string
implementation
1200
x8134
959B
Mahmoud and Ehab and the message
dsu
,
greedy
,
implementation
1200
x9480
958B1
Maximum Control (easy)
implementation
1000
x3363
955A
Feed the cat
greedy
,
math
1100
x6623
950B
Intercepted Message
greedy
,
implementation
1100
x7545
940A
Points on the line
brute force
,
greedy
,
sortings
1200
x8222
939B
Hamster Farm
implementation
1000
x10436
938B
Run For Your Prize
brute force
,
greedy
1100
x8788
934B
A Prosperous Lot
constructive algorithms
,
implementation
1200
x8589
931B
World Cup
constructive algorithms
,
implementation
1200
x7078
920B
Tea Queue
implementation
1200
x7208
920A
Water The Garden
implementation
1000
x7654
919B
Perfect Number
binary search
,
brute force
,
dp
,
implementation
,
number theory
1100
x27590
914B
Conan and Agasa play a Card Game
games
,
greedy
,
implementation
1200
x8562
913B
Christmas Spruce
implementation
,
trees
1200
x15745
911B
Two Cakes
binary search
,
brute force
,
implementation
1200
x11234
911A
Nearest Minimums
implementation
1100
x11377
909A
Generate Login
brute force
,
greedy
,
sortings
1000
x9254
908B
New Year and Buggy Bot
brute force
,
implementation
1200
x7614
903C
Boxes Packing
greedy
1200
x16903
903B
The Modcrab
greedy
,
implementation
1200
x7699
902B
Coloring a Tree
dfs and similar
,
dsu
,
greedy
1200
x10716
902A
Visiting a Friend
greedy
,
implementation
1100
x9758
899B
Months and Years
implementation
1200
x5832
898B
Proper Nutrition
brute force
,
implementation
,
number theory
1100
x9417
895A
Pizza Separation
brute force
,
implementation
1200
x6497
893B
Beautiful Divisors
brute force
,
implementation
1000
x11162
892B
Wrath
greedy
,
implementation
,
two pointers
1200
x8805
888B
Buggy Robot
greedy
1000
x9631
887A
Div. 64
implementation
1000
x11138
884B
Japanese Crosswords Strike Back
implementation
1100
x6843
883M
Quadcopter Competition
greedy
,
math
1100
x3531
879B
Table Tennis
data structures
,
implementation
1200
x12173
877A
Alex and broken contest
implementation
,
strings
1100
x10806
870B
Maximum of Maximums of Minimums
greedy
1200
x9358
869A
The Artful Expedient
brute force
,
implementation
1100
x9416
864B
Polycarp and Letters
brute force
,
implementation
,
strings
1000
x9028
864A
Fair Game
implementation
,
sortings
1000
x11596
862A
Mahmoud and Ehab and the MEX
greedy
,
implementation
1000
x9431
849A
Odds and Ends
implementation
1000
x8997
847M
Weather Tomorrow
implementation
,
math
1000
x6239
845A
Chess Tourney
implementation
,
sortings
1100
x7686
844A
Diversity
greedy
,
implementation
,
strings
1000
x10548
835B
The number on the board
greedy
1100
x10999
834B
The Festive Evening
data structures
,
implementation
1100
x8681
831A
Unimodal Array
implementation
1000
x10126
828A
Restaurant Tables
implementation
1200
x7869
825A
Binary Protocol
implementation
1100
x7621
822B
Crossword solving
brute force
,
implementation
,
strings
1000
x9457
817A
Treasure Hunt
implementation
,
math
,
number theory
1200
x6179
816A
Karen and Morning
brute force
,
implementation
1000
x8976
813A
The Contest
implementation
1100
x5054
812A
Sagheer and Crossroads
implementation
1200
x6191
811B
Vladik and Complicated Book
implementation
,
sortings
1200
x6456
805A
Fake NP
greedy
,
math
1000
x17827
804A
Find Amir
constructive algorithms
,
greedy
,
math
1000
x15331
802M
April Fools' Problem (easy)
greedy
,
sortings
1200
x3064
799A
Carrot Cakes
brute force
,
implementation
1100
x18430
797A
k-Factorization
implementation
,
math
,
number theory
1100
x14709
792A
New Bus Route
implementation
,
sortings
1100
x8866
789A
Anastasia and pebbles
implementation
,
math
1100
x9271
785B
Anton and Classes
greedy
,
sortings
1100
x10174
779C
Dishonest Sellers
constructive algorithms
,
greedy
,
sortings
1200
x11714
779B
Weird Rounding
brute force
,
greedy
1100
x10271
777A
Shell Game
constructive algorithms
,
implementation
,
math
1000
x10165
774C
Maximum Number
*special problem
,
constructive algorithms
,
greedy
,
implementation
1200
x4061
769B
News About Credit
*special problem
,
greedy
,
two pointers
1200
x3268
767A
Snacktower
data structures
,
implementation
1100
x19764
766B
Mahmoud and a Triangle
constructive algorithms
,
geometry
,
greedy
,
math
,
number theory
,
sortings
1000
x32072
765B
Code obfuscation
greedy
,
implementation
,
strings
1100
x7074
761A
Dasha and Stairs
brute force
,
constructive algorithms
,
implementation
,
math
1000
x14405
758B
Blown Garland
brute force
,
implementation
,
number theory
1100
x10141
757A
Gotta Catch Em' All!
implementation
1000
x11157
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