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Before contest
Codeforces Round 941 (Div. 1)
29:38:29
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Before contest
Codeforces Round 941 (Div. 2)
29:38:29
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greedy
combine-tags-by-or
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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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Problems
#
Name
1363E
Tree Shuffling
dfs and similar
,
dp
,
greedy
,
trees
2000
x6476
1936A
Bitwise Operation Wizard
bitmasks
,
constructive algorithms
,
greedy
,
interactive
,
math
1700
x6456
1313B
Different Rules
constructive algorithms
,
greedy
,
implementation
,
math
1700
x6446
1394A
Boboniu Chats with Du
dp
,
greedy
,
sortings
,
two pointers
1800
x6443
485B
Valuable Resources
brute force
,
greedy
1300
x6442
350C
Bombs
greedy
,
implementation
,
sortings
1600
x6428
1204C
Anna, Svyatoslav and Maps
dp
,
graphs
,
greedy
,
shortest paths
1700
x6427
1608C
Game Master
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
two pointers
1700
x6407
1868B1
Candy Party (Easy Version)
bitmasks
,
constructive algorithms
,
graphs
,
greedy
,
implementation
,
math
1700
x6405
1678B2
Tokitsukaze and Good 01-String (hard version)
dp
,
greedy
,
implementation
1800
x6379
1870D
Prefix Purchase
greedy
,
implementation
,
sortings
1800
x6376
257A
Sockets
greedy
,
implementation
,
sortings
1100
x6374
620C
Pearls in a Row
greedy
1500
x6358
1620C
BA-String
brute force
,
dp
,
greedy
,
implementation
,
math
1800
x6341
999E
Reachability from the Capital
dfs and similar
,
graphs
,
greedy
2000
x6339
166C
Median
greedy
,
math
,
sortings
1500
x6333
1425A
Arena of Greed
games
,
greedy
1400
x6332
1413D
Shurikens
data structures
,
greedy
,
implementation
1700
x6327
1579E2
Array Optimization by Deque
data structures
,
greedy
1700
x6326
1930C
Lexicographically Largest
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
1700
x6319
472C
Design Tutorial: Make It Nondeterministic
greedy
1400
x6313
1864D
Matrix Cascade
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
1700
x6305
1073D
Berland Fair
binary search
,
brute force
,
data structures
,
greedy
1700
x6305
1168A
Increasing by Modulo
binary search
,
greedy
1700
x6300
1721D
Maximum AND
bitmasks
,
dfs and similar
,
divide and conquer
,
greedy
,
sortings
1800
x6275
777C
Alyona and Spreadsheet
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
1600
x6275
288A
Polo the Penguin and Strings
greedy
1300
x6272
976C
Nested Segments
greedy
,
implementation
,
sortings
1500
x6267
1283E
New Year Parties
dp
,
greedy
1800
x6266
1763C
Another Array Problem
brute force
,
constructive algorithms
,
greedy
2000
x6260
797C
Minimal string
data structures
,
greedy
,
strings
1700
x6238
61D
Eternal Victory
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
1800
x6232
1861D
Sorting By Multiplication
dp
,
greedy
1800
x6207
1467C
Three Bags
constructive algorithms
,
greedy
1900
x6198
1181B
Split a Number
greedy
,
implementation
,
strings
1500
x6172
1430E
String Reversal
data structures
,
greedy
,
strings
1900
x6146
1313C2
Skyscrapers (hard version)
data structures
,
dp
,
greedy
1900
x6145
1674E
Breaking the Wall
binary search
,
brute force
,
constructive algorithms
,
greedy
,
math
2000
x6142
1009D
Relatively Prime Graph
brute force
,
constructive algorithms
,
graphs
,
greedy
,
math
1700
x6138
1156B
Ugly Pairs
dfs and similar
,
greedy
,
implementation
,
sortings
,
strings
1800
x6125
1227D1
Optimal Subsequences (Easy Version)
data structures
,
greedy
1600
x6117
1388D
Captain Flint and Treasure
data structures
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
trees
2000
x6115
415B
Mashmokh and Tokens
binary search
,
greedy
,
implementation
,
math
1500
x6111
494A
Treasure
greedy
1500
x6099
1901D
Yet Another Monster Fight
binary search
,
dp
,
greedy
,
implementation
,
math
1700
x6089
1705D
Mark and Lightbulbs
combinatorics
,
constructive algorithms
,
greedy
,
math
,
sortings
1800
x6083
1304D
Shortest and Longest LIS
constructive algorithms
,
graphs
,
greedy
,
two pointers
1800
x6065
1187C
Vasya And Array
constructive algorithms
,
greedy
,
implementation
1800
x6064
584C
Marina and Vasya
constructive algorithms
,
greedy
,
strings
1700
x6062
760B
Frodo and pillows
binary search
,
greedy
1500
x6045
460C
Present
binary search
,
data structures
,
greedy
1700
x6031
1292B
Aroma's Search
brute force
,
constructive algorithms
,
geometry
,
greedy
,
implementation
1700
x6017
1307D
Cow and Fields
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
sortings
1900
x6015
1805D
A Wide, Wide Graph
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
1800
x6014
1734D
Slime Escape
data structures
,
dp
,
greedy
,
two pointers
1800
x5999
1508A
Binary Literature
constructive algorithms
,
greedy
,
implementation
,
strings
,
two pointers
1900
x5981
1672D
Cyclic Rotation
constructive algorithms
,
greedy
,
implementation
,
two pointers
1700
x5972
1453C
Triangles
greedy
,
implementation
1700
x5972
1215D
Ticket Game
games
,
greedy
,
math
1700
x5964
864D
Make a Permutation!
greedy
,
implementation
,
math
1500
x5953
808C
Tea Party
constructive algorithms
,
greedy
,
sortings
1400
x5953
1934C
Find a Mine
binary search
,
constructive algorithms
,
geometry
,
greedy
,
interactive
,
math
1700
x5950
371A
K-Periodic Array
greedy
,
implementation
,
math
1000
x5934
205B
Little Elephant and Sorting
brute force
,
greedy
1400
x5930
1492D
Genius's Gambit
bitmasks
,
constructive algorithms
,
greedy
,
math
1900
x5919
1512F
Education
brute force
,
dp
,
greedy
,
implementation
1900
x5916
1118D2
Coffee and Coursework (Hard Version)
binary search
,
greedy
1700
x5910
749C
Voting
greedy
,
implementation
,
two pointers
1500
x5906
1560F1
Nearest Beautiful Number (easy version)
binary search
,
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
greedy
1900
x5897
1416B
Make Them Equal
constructive algorithms
,
greedy
,
math
2000
x5894
1017C
The Phone Number
constructive algorithms
,
greedy
1600
x5889
1156C
Match Points
binary search
,
greedy
,
sortings
,
ternary search
,
two pointers
2000
x5880
1809D
Binary String Sorting
constructive algorithms
,
greedy
1800
x5864
1237C1
Balanced Removals (Easier)
constructive algorithms
,
geometry
,
greedy
1700
x5857
103A
Testing Pants for Sadness
greedy
,
implementation
,
math
1100
x5855
1495B
Let's Go Hiking
games
,
greedy
1900
x5832
1436D
Bandit in a City
binary search
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x5830
1342D
Multiple Testcases
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
,
two pointers
1900
x5828
1095F
Make It Connected
dsu
,
graphs
,
greedy
1900
x5826
864C
Bus
greedy
,
implementation
,
math
1500
x5824
1700D
River Locks
binary search
,
dp
,
greedy
,
math
1900
x5819
464A
No to Palindromes!
greedy
,
strings
1700
x5810
1137B
Camp Schedule
greedy
,
hashing
,
strings
1600
x5804
1923D
Slimes
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
1800
x5780
1801B
Buying gifts
data structures
,
greedy
,
sortings
1800
x5770
1552C
Maximize the Intersections
combinatorics
,
constructive algorithms
,
geometry
,
greedy
,
sortings
1800
x5766
853A
Planning
greedy
1500
x5765
1162B
Double Matrix
brute force
,
greedy
1400
x5759
538C
Tourist's Notes
binary search
,
brute force
,
greedy
,
implementation
,
math
1600
x5756
500C
New Year Book Reading
constructive algorithms
,
greedy
,
implementation
,
math
1600
x5738
1793D
Moscow Gorillas
binary search
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1800
x5733
12C
Fruits
greedy
,
implementation
,
sortings
1100
x5716
190A
Vasya and the Bus
greedy
,
math
1100
x5708
525C
Ilya and Sticks
greedy
,
math
,
sortings
1600
x5693
1399E1
Weights Division (easy version)
data structures
,
dfs and similar
,
greedy
,
trees
2000
x5672
1210B
Marcin and Training Camp
brute force
,
greedy
1700
x5662
628C
Bear and String Distance
greedy
,
strings
1300
x5654
1175D
Array Splitting
greedy
,
sortings
1900
x5636
600C
Make Palindrome
constructive algorithms
,
greedy
,
strings
1800
x5625
1056D
Decorate Apple Tree
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
1600
x5614
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