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Codeforces Round 972 (Div. 2)
28:43:36
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→ Filter Problems
Difficulty:
—
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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Problems
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Custom test
Problems
#
Name
799B
T-shirt buying
data structures
,
implementation
1400
x8743
799A
Carrot Cakes
brute force
,
implementation
1100
x18686
797B
Odd sum
dp
,
greedy
,
implementation
1400
x10485
797A
k-Factorization
implementation
,
math
,
number theory
1100
x15098
796B
Find The Bone
implementation
1300
x9047
796A
Buying A House
brute force
,
implementation
800
x12971
794A
Bank Robbery
brute force
,
implementation
800
x6989
793C
Mice problem
geometry
,
implementation
,
math
,
sortings
2300
x1248
793B
Igor and his way to work
dfs and similar
,
graphs
,
implementation
,
shortest paths
1600
x4423
793A
Oleg and shares
implementation
,
math
900
x6747
792B
Counting-out Rhyme
implementation
1300
x5976
792A
New Bus Route
implementation
,
sortings
1100
x8902
791A
Bear and Big Brother
implementation
800
x191377
789B
Masha and geometric depression
brute force
,
implementation
,
math
1700
x4371
789A
Anastasia and pebbles
implementation
,
math
1100
x9300
787B
Not Afraid
greedy
,
implementation
,
math
1300
x5593
785A
Anton and Polyhedrons
implementation
,
strings
800
x87668
784F
Crunching Numbers Just for You
*special problem
,
implementation
1900
x1070
784E
Twisted Circuit
*special problem
,
brute force
,
implementation
2000
x1941
784D
Touchy-Feely Palindromes
*special problem
,
implementation
1900
x455
784C
INTERCALC
*special problem
,
implementation
1800
x721
780H
Intranet of Buses
binary search
,
geometry
,
implementation
,
two pointers
3100
x118
780D
Innokenty and a Football League
2-sat
,
graphs
,
greedy
,
implementation
,
shortest paths
,
strings
1900
x2894
780A
Andryusha and Socks
implementation
800
x19384
778B
Bitwise Formula
bitmasks
,
brute force
,
dfs and similar
,
expression parsing
,
implementation
1800
x2306
777D
Cloud of Hashtags
binary search
,
greedy
,
implementation
,
strings
1800
x4974
777C
Alyona and Spreadsheet
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
1600
x6352
777A
Shell Game
constructive algorithms
,
implementation
,
math
1000
x10256
776F
Sherlock's bet to Moriarty
constructive algorithms
,
data structures
,
divide and conquer
,
geometry
,
graphs
,
implementation
,
trees
2800
x436
776C
Molly's Chemicals
binary search
,
brute force
,
data structures
,
implementation
,
math
1800
x5890
776A
A Serial Killer
brute force
,
implementation
,
strings
900
x12010
774K
Stepan and Vowels
*special problem
,
implementation
,
strings
1600
x1265
774D
Lie or Truth
*special problem
,
constructive algorithms
,
implementation
,
sortings
1500
x1940
774C
Maximum Number
*special problem
,
constructive algorithms
,
greedy
,
implementation
1200
x4073
770D
Draw Brackets!
*special problem
,
implementation
1400
x1569
770C
Online Courses In BSU
*special problem
,
dfs and similar
,
graphs
,
implementation
1500
x2613
770B
Maximize Sum of Digits
*special problem
,
implementation
,
math
1300
x2807
770A
New Password
*special problem
,
implementation
800
x19685
769A
Year of University Entrance
*special problem
,
implementation
,
sortings
800
x5699
768C
Jon Snow and his Favourite Number
brute force
,
dp
,
implementation
,
sortings
1800
x3789
767A
Snacktower
data structures
,
implementation
1100
x20057
765E
Tree Folding
dfs and similar
,
dp
,
greedy
,
implementation
,
trees
2200
x1275
765B
Code obfuscation
greedy
,
implementation
,
strings
1100
x7097
765A
Neverending competitions
implementation
,
math
900
x8974
764B
Timofey and cubes
constructive algorithms
,
implementation
900
x11795
764A
Taymyr is calling you
brute force
,
implementation
,
math
800
x16234
763C
Timofey and remoduling
brute force
,
implementation
,
math
,
number theory
2600
x707
763A
Timofey and a tree
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
1600
x10497
762D
Maximum path
dp
,
greedy
,
implementation
2300
x1547
762B
USB vs. PS/2
greedy
,
implementation
,
sortings
,
two pointers
1400
x8000
761F
Dasha and Photos
brute force
,
data structures
,
dp
,
implementation
2600
x410
761C
Dasha and Password
brute force
,
dp
,
implementation
1500
x5864
761B
Dasha and friends
brute force
,
implementation
,
math
1300
x6840
761A
Dasha and Stairs
brute force
,
constructive algorithms
,
implementation
,
math
1000
x14460
760A
Petr and a calendar
implementation
,
math
800
x8079
758C
Unfair Poll
binary search
,
constructive algorithms
,
implementation
,
math
1700
x3864
758B
Blown Garland
brute force
,
implementation
,
number theory
1100
x10171
758A
Holiday Of Equality
implementation
,
math
800
x60236
757A
Gotta Catch Em' All!
implementation
1000
x11211
754C
Vladik and chat
brute force
,
constructive algorithms
,
dp
,
implementation
,
strings
2200
x925
754B
Ilya and tic-tac-toe game
brute force
,
implementation
1100
x7207
754A
Lesha and array splitting
constructive algorithms
,
greedy
,
implementation
1200
x8649
753B
Interactive Bulls and Cows (Easy)
brute force
,
constructive algorithms
,
implementation
1600
x1189
750F
New Year and Finding Roots
constructive algorithms
,
implementation
,
interactive
,
trees
2800
x482
750D
New Year and Fireworks
brute force
,
data structures
,
dfs and similar
,
dp
,
implementation
1900
x3077
750B
New Year and North Pole
geometry
,
implementation
1300
x9460
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x74603
749C
Voting
greedy
,
implementation
,
two pointers
1500
x5963
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x48786
748B
Santa Claus and Keyboard Check
implementation
,
strings
1500
x5320
748A
Santa Claus and a Place in a Class
implementation
,
math
800
x8949
747E
Comments
dfs and similar
,
expression parsing
,
implementation
,
strings
1700
x1958
747C
Servers
implementation
1300
x4620
747B
Mammoth's Genome Decoding
implementation
,
strings
900
x8803
746E
Numbers Exchange
greedy
,
implementation
,
math
1900
x1729
746C
Tram
constructive algorithms
,
implementation
,
math
1600
x3708
746B
Decoding
implementation
,
strings
900
x27633
746A
Compote
implementation
,
math
800
x21279
745B
Hongcow Solves A Puzzle
implementation
1400
x3735
745A
Hongcow Learns the Cyclic Shift
implementation
,
strings
900
x10417
743B
Chloe and the sequence
binary search
,
bitmasks
,
constructive algorithms
,
implementation
1200
x14656
743A
Vladik and flights
constructive algorithms
,
greedy
,
implementation
1200
x11020
742A
Arpa’s hard exam and Mehrdad’s naive cheat
implementation
,
math
,
number theory
1000
x42004
740A
Alyona and copybooks
brute force
,
implementation
1300
x8890
735A
Ostap and Grasshopper
implementation
,
strings
800
x12429
734F
Anton and School
bitmasks
,
constructive algorithms
,
implementation
,
math
2500
x1292
734D
Anton and Chess
implementation
1700
x3719
734B
Anton and Digits
brute force
,
greedy
,
implementation
,
math
800
x29149
734A
Anton and Danik
implementation
,
strings
800
x149402
733A
Grasshopper And the String
implementation
1000
x16112
732C
Sanatorium
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1200
x9685
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x71421
731F
Video Cards
brute force
,
data structures
,
implementation
,
math
,
number theory
1900
x2819
731A
Night at the Museum
implementation
,
strings
800
x45298
730H
Delete Them
constructive algorithms
,
implementation
1300
x2964
730G
Car Repair Shop
implementation
1600
x2130
730E
Award Ceremony
greedy
,
implementation
2200
x720
730D
Running Over The Bridges
greedy
,
implementation
,
math
2200
x878
730A
Toda 2
greedy
,
implementation
1800
x1565
729B
Spotlights
dp
,
implementation
1200
x7889
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