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Codeforces Round (Div. 1 + Div. 2)
2 days
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Difficulty:
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greedy
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
1335C
Two Teams Composing
binary search
,
greedy
,
implementation
,
sortings
1100
x33401
1334F
Strange Function
binary search
,
data structures
,
dp
,
greedy
2500
x1131
1334E
Divisor Paths
combinatorics
,
graphs
,
greedy
,
math
,
number theory
2200
x2643
1334D
Minimum Euler Cycle
constructive algorithms
,
graphs
,
greedy
,
implementation
1800
x7053
1334C
Circle of Monsters
brute force
,
constructive algorithms
,
greedy
,
math
1600
x16140
1334B
Middle Class
greedy
,
sortings
1100
x25249
1333F
Kate and imperfection
greedy
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2200
x3980
1333D
Challenges in school №41
brute force
,
constructive algorithms
,
games
,
graphs
,
greedy
,
implementation
,
sortings
2100
x3696
1333B
Kind Anton
greedy
,
implementation
1100
x21288
1332C
K-Complete Word
dfs and similar
,
dsu
,
greedy
,
implementation
,
strings
1500
x15712
1332B
Composite Coloring
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1400
x17148
1332A
Exercising Walk
greedy
,
implementation
,
math
1100
x19149
1329E
Dreamoon Loves AA
binary search
,
greedy
3300
x172
1329C
Drazil Likes Heap
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1541
1329A
Dreamoon Likes Coloring
constructive algorithms
,
greedy
,
implementation
,
math
1800
x8839
1328F
Make k Equal
greedy
2200
x3006
1328D
Carousel
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
1800
x12600
1328C
Ternary XOR
greedy
,
implementation
1200
x29485
1327B
Princesses and Princes
brute force
,
graphs
,
greedy
1200
x18329
1326D2
Prefix-Suffix Palindrome (Hard version)
binary search
,
greedy
,
hashing
,
string suffix structures
,
strings
1800
x9623
1326C
Permutation Partitions
combinatorics
,
greedy
,
math
1300
x15299
1325F
Ehab's Last Theorem
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2500
x1738
1325D
Ehab the Xorcist
bitmasks
,
constructive algorithms
,
greedy
,
number theory
1700
x11614
1325C
Ehab and Path-etic MEXs
constructive algorithms
,
dfs and similar
,
greedy
,
trees
1500
x12992
1325B
CopyCopyCopyCopyCopy
greedy
,
implementation
800
x34969
1325A
EhAb AnD gCd
constructive algorithms
,
greedy
,
number theory
800
x38340
1324C
Frog Jumps
binary search
,
data structures
,
dfs and similar
,
greedy
,
implementation
1100
x26968
1323B
Count Subrectangles
binary search
,
greedy
,
implementation
1500
x8544
1323A
Even Subset Sum Problem
brute force
,
dp
,
greedy
,
implementation
800
x19385
1322A
Unusual Competitions
greedy
1300
x12242
1321C
Remove Adjacent
brute force
,
constructive algorithms
,
greedy
,
strings
1600
x9517
1321A
Contest for Robots
greedy
900
x14021
1320A
Journey Planning
data structures
,
dp
,
greedy
,
math
,
sortings
1400
x15511
1316E
Team Building
bitmasks
,
dp
,
greedy
,
sortings
2300
x3500
1315C
Restoring Permutation
greedy
1200
x9807
1315B
Homecoming
binary search
,
dp
,
greedy
,
strings
1300
x8969
1313C2
Skyscrapers (hard version)
data structures
,
dp
,
greedy
1900
x6177
1313C1
Skyscrapers (easy version)
brute force
,
data structures
,
dp
,
greedy
1500
x10114
1313B
Different Rules
constructive algorithms
,
greedy
,
implementation
,
math
1700
x6468
1313A
Fast Food Restaurant
brute force
,
greedy
,
implementation
900
x15208
1312E
Array Shrinking
dp
,
greedy
2100
x5546
1312C
Adding Powers
bitmasks
,
greedy
,
implementation
,
math
,
number theory
,
ternary search
1400
x15920
1312A
Two Regular Polygons
geometry
,
greedy
,
math
,
number theory
800
x25357
1311A
Add Odd or Subtract Even
greedy
,
implementation
,
math
800
x40768
1310A
Recommendations
data structures
,
greedy
,
sortings
1700
x4977
1307E
Cow and Treats
binary search
,
combinatorics
,
dp
,
greedy
,
implementation
,
math
2500
x1120
1307D
Cow and Fields
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
sortings
1900
x6035
1307B
Cow and Friend
geometry
,
greedy
,
math
1300
x12942
1307A
Cow and Haybales
greedy
,
implementation
800
x14722
1305H
Kuroni the Private Tutor
binary search
,
greedy
3500
x110
1305E
Kuroni and the Score Distribution
constructive algorithms
,
greedy
,
implementation
,
math
2200
x2918
1305B
Kuroni and Simple Strings
constructive algorithms
,
greedy
,
strings
,
two pointers
1200
x11394
1305A
Kuroni and the Gifts
brute force
,
constructive algorithms
,
greedy
,
sortings
800
x13793
1304F2
Animal Observation (hard version)
data structures
,
dp
,
greedy
2400
x1328
1304D
Shortest and Longest LIS
constructive algorithms
,
graphs
,
greedy
,
two pointers
1800
x6078
1304C
Air Conditioner
dp
,
greedy
,
implementation
,
sortings
,
two pointers
1500
x15805
1304B
Longest Palindrome
brute force
,
constructive algorithms
,
greedy
,
implementation
,
strings
1100
x17451
1303D
Fill The Bag
bitmasks
,
greedy
1900
x6835
1303C
Perfect Keyboard
dfs and similar
,
greedy
,
implementation
1600
x11844
1301C
Ayoub's function
binary search
,
combinatorics
,
greedy
,
math
,
strings
1700
x9065
1301B
Motarack's Birthday
binary search
,
greedy
,
ternary search
1500
x13878
1300B
Assigning to Classes
greedy
,
implementation
,
sortings
1000
x22321
1299C
Water Balance
data structures
,
geometry
,
greedy
2100
x3643
1299A
Anu Has a Function
brute force
,
greedy
,
math
1500
x11765
1297F
Movie Fan
*special problem
,
data structures
,
greedy
,
implementation
,
sortings
x113
1297D
Bonus Distribution
*special problem
,
binary search
,
greedy
,
sortings
x259
1297C
Dream Team
*special problem
,
greedy
x396
1296F
Berland Beauty
constructive algorithms
,
dfs and similar
,
greedy
,
sortings
,
trees
2100
x2677
1296E1
String Coloring (easy version)
constructive algorithms
,
dp
,
graphs
,
greedy
,
sortings
1800
x7128
1296D
Fight with Monsters
greedy
,
sortings
1500
x13896
1295C
Obtain The String
dp
,
greedy
,
strings
1600
x12569
1295A
Display The Number
greedy
900
x22351
1294F
Three Paths on a Tree
dfs and similar
,
dp
,
greedy
,
trees
2000
x5365
1294E
Obtain a Permutation
greedy
,
implementation
,
math
1900
x4696
1294D
MEX maximizing
data structures
,
greedy
,
implementation
,
math
1600
x11334
1294C
Product of Three Numbers
greedy
,
math
,
number theory
1300
x32499
1293B
JOE is on TV!
combinatorics
,
greedy
,
math
1000
x20842
1292E
Rin and The Unknown Flower
constructive algorithms
,
greedy
,
interactive
,
math
3500
x328
1292D
Chaotic V.
dp
,
graphs
,
greedy
,
math
,
number theory
,
trees
2700
x778
1292C
Xenon's Attack on the Gangs
combinatorics
,
dfs and similar
,
dp
,
greedy
,
trees
2300
x1874
1292B
Aroma's Search
brute force
,
constructive algorithms
,
geometry
,
greedy
,
implementation
1700
x6032
1291B
Array Sharpening
greedy
,
implementation
1300
x13835
1291A
Even But Not Even
greedy
,
math
,
strings
900
x19071
1287A
Angry Students
greedy
,
implementation
800
x20216
1286B
Numbers on Tree
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1800
x4390
1286A
Garland
dp
,
greedy
,
sortings
1800
x8413
1285D
Dr. Evil Underscores
bitmasks
,
brute force
,
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
strings
,
trees
1900
x7354
1285B
Just Eat It!
dp
,
greedy
,
implementation
1300
x21143
1283F
DIY Garland
constructive algorithms
,
greedy
,
trees
2200
x1649
1283E
New Year Parties
dp
,
greedy
1800
x6293
1283D
Christmas Trees
graphs
,
greedy
,
shortest paths
1800
x7469
1282C
Petya and Exam
greedy
,
sortings
,
two pointers
1800
x4110
1282B2
K for the Price of One (Hard Version)
dp
,
greedy
,
sortings
1600
x9834
1282B1
K for the Price of One (Easy Version)
dp
,
greedy
,
sortings
1400
x11182
1281B
Azamon Web Services
greedy
1600
x8050
1280D
Miss Punyverse
dp
,
greedy
,
trees
2500
x923
1280C
Jeremy Bearimy
dfs and similar
,
graphs
,
greedy
,
trees
2000
x2484
1278C
Berry Jam
data structures
,
dp
,
greedy
,
implementation
1700
x7618
1278B
A and B
greedy
,
math
1500
x12905
1277B
Make Them Odd
greedy
,
number theory
1200
x14667
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