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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
1437C
Chef Monocarp
dp
,
flows
,
graph matchings
,
greedy
,
math
,
sortings
1800
x10481
1436C
Binary Search
binary search
,
combinatorics
1500
x10800
1431D
Used Markers
*special problem
,
greedy
1500
x455
1431C
Black Friday
*special problem
,
implementation
1600
x704
1431B
Polycarp and the Language of Gods
*special problem
,
implementation
,
two pointers
1400
x1010
1430D
String Deletion
binary search
,
data structures
,
greedy
,
two pointers
1700
x8795
1427B
Chess Cheater
greedy
,
implementation
,
sortings
1400
x10895
1426E
Rock, Paper, Scissors
brute force
,
constructive algorithms
,
flows
,
greedy
,
math
1800
x7416
1426D
Non-zero Segments
constructive algorithms
,
data structures
,
greedy
,
sortings
1500
x15987
1425F
Flamingoes of Mystery
interactive
1400
x5711
1425A
Arena of Greed
games
,
greedy
1400
x6523
1423K
Lonely Numbers
binary search
,
math
,
number theory
,
two pointers
1600
x4840
1422C
Bargain
combinatorics
,
dp
,
math
1700
x8224
1421C
Palindromifier
constructive algorithms
,
strings
1400
x12791
1420D
Rescue Nibel!
combinatorics
,
data structures
,
sortings
1800
x7579
1419D2
Sage's Birthday (hard version)
binary search
,
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x15568
1419C
Killjoy
greedy
,
implementation
,
math
1500
x15368
1418C
Mortal Kombat Tower
dp
,
graphs
,
greedy
,
shortest paths
1500
x19831
1416A
k-Amazing Numbers
binary search
,
data structures
,
implementation
,
two pointers
1500
x12514
1415C
Bouncing Ball
brute force
,
dp
,
implementation
1400
x10893
1413D
Shurikens
data structures
,
greedy
,
implementation
1700
x6495
1411C
Peaceful Rooks
dfs and similar
,
dsu
,
graphs
1700
x7977
1409E
Two Platforms
binary search
,
dp
,
sortings
,
two pointers
1800
x7823
1409D
Decrease the Sum of Digits
greedy
,
math
1500
x19386
1408C
Discrete Acceleration
binary search
,
dp
,
implementation
,
math
,
two pointers
1500
x8845
1408B
Arrays Sum
constructive algorithms
,
greedy
,
math
1400
x9950
1407C
Chocolate Bunny
constructive algorithms
,
interactive
,
math
,
two pointers
1600
x12026
1406C
Link Cut Centroids
constructive algorithms
,
dfs and similar
,
graphs
,
trees
1700
x10271
1404A
Balanced Bitstring
implementation
,
strings
1500
x15397
1402A
Fancy Fence
*special problem
,
data structures
,
dsu
,
implementation
,
math
,
sortings
1800
x1187
1401D
Maximum Distributed Tree
dfs and similar
,
dp
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
trees
1800
x9304
1400C
Binary String Reconstruction
2-sat
,
brute force
,
constructive algorithms
,
greedy
1500
x17316
1400B
RPG Protagonist
brute force
,
greedy
,
math
1700
x11185
1399D
Binary String To Subsequences
constructive algorithms
,
data structures
,
greedy
,
implementation
1500
x18253
1398D
Colored Rectangles
dp
,
greedy
,
sortings
1800
x11467
1398C
Good Subarrays
data structures
,
dp
,
math
1600
x26327
1397B
Power Sequence
brute force
,
math
,
number theory
,
sortings
1500
x14694
1396B
Stoned Game
brute force
,
constructive algorithms
,
games
,
greedy
1800
x11385
1396A
Multiples of Length
constructive algorithms
,
greedy
,
number theory
1600
x15427
1395C
Boboniu and Bit Operations
bitmasks
,
brute force
,
dp
,
greedy
1600
x14101
1394A
Boboniu Chats with Du
dp
,
greedy
,
sortings
,
two pointers
1800
x6767
1393C
Pinkie Pie Eats Patty-cakes
constructive algorithms
,
greedy
,
math
,
sortings
1700
x10621
1393B
Applejack and Storages
constructive algorithms
,
data structures
,
greedy
,
implementation
1400
x16689
1392D
Omkar and Bed Wars
dp
,
greedy
1700
x8926
1391C
Cyclic Permutations
combinatorics
,
dp
,
graphs
,
math
1500
x15009
1389C
Good String
brute force
,
dp
,
greedy
,
two pointers
1500
x19008
1389B
Array Walk
brute force
,
dp
,
greedy
1600
x16735
1388C
Uncle Bogdan and Country Happiness
dfs and similar
,
greedy
,
math
,
trees
1800
x9710
1385D
a-Good String
bitmasks
,
brute force
,
divide and conquer
,
dp
,
implementation
1500
x19262
1383A
String Transformation 1
dsu
,
graphs
,
greedy
,
sortings
,
strings
,
trees
,
two pointers
1700
x10642
1381B
Unmerge
dp
1800
x8899
1381A2
Prefix Flip (Hard Version)
constructive algorithms
,
data structures
,
implementation
,
strings
,
two pointers
1700
x13282
1380C
Create The Teams
brute force
,
dp
,
greedy
,
implementation
,
sortings
1400
x20701
1380B
Universal Solution
greedy
1400
x14596
1379B
Dubious Cyrpto
binary search
,
brute force
,
math
,
number theory
1500
x12652
1379A
Acacius and String
brute force
,
implementation
,
strings
1500
x11915
1375C
Element Extermination
constructive algorithms
,
data structures
,
greedy
1400
x21121
1374E1
Reading Books (easy version)
data structures
,
greedy
,
sortings
1600
x14024
1374D
Zero Remainder Array
math
,
sortings
,
two pointers
1400
x23731
1373D
Maximum Sum on Even Positions
divide and conquer
,
dp
,
greedy
,
implementation
1600
x15594
1372C
Omkar and Baseball
constructive algorithms
,
math
1500
x17822
1371D
Grid-00100
constructive algorithms
,
greedy
,
implementation
1600
x12984
1370C
Number Game
games
,
math
,
number theory
1400
x24547
1369C
RationalLee
greedy
,
math
,
sortings
,
two pointers
1400
x19569
1368D
AND, OR and square sum
bitmasks
,
greedy
,
math
1700
x11794
1368C
Even Picture
constructive algorithms
1500
x13344
1368B
Codeforces Subsequences
brute force
,
constructive algorithms
,
greedy
,
math
,
strings
1500
x19715
1367D
Task On The Board
constructive algorithms
,
greedy
,
implementation
,
sortings
1800
x8337
1366C
Palindromic Paths
greedy
,
math
1500
x13571
1365D
Solve The Maze
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
shortest paths
1700
x17272
1365C
Rotation Matching
constructive algorithms
,
data structures
,
greedy
,
implementation
1400
x23083
1364C
Ehab and Prefix MEXs
brute force
,
constructive algorithms
,
greedy
1600
x13154
1363C
Game On Leaves
games
,
trees
1600
x18677
1363B
Subsequence Hate
implementation
,
strings
1400
x23602
1362C
Johnny and Another Rating Drop
bitmasks
,
greedy
,
math
1400
x18296
1361A
Johnny and Contribution
constructive algorithms
,
graphs
,
greedy
,
sortings
1700
x8425
1360F
Spy-string
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
hashing
,
strings
1700
x12397
1359C
Mixing Water
binary search
,
math
1700
x13821
1358C
Celex Update
math
1600
x17370
1355D
Game With Array
constructive algorithms
,
math
1400
x18020
1355C
Count Triangles
binary search
,
implementation
,
math
,
two pointers
1800
x10646
1354C1
Simple Polygon Embedding
binary search
,
geometry
,
math
,
ternary search
1400
x15682
1353D
Constructing the Array
constructive algorithms
,
data structures
,
sortings
1600
x18088
1352G
Special Permutation
constructive algorithms
1600
x21186
1352F
Binary String Reconstruction
constructive algorithms
,
dfs and similar
,
math
1500
x17104
1352E
Special Elements
brute force
,
implementation
,
two pointers
1500
x20512
1351C
Skier
data structures
,
implementation
1400
x8547
1350B
Orac and Models
dp
,
math
,
number theory
1400
x22127
1349A
Orac and LCM
data structures
,
math
,
number theory
1600
x17046
1348C
Phoenix and Distribution
constructive algorithms
,
greedy
,
sortings
,
strings
1600
x14614
1348B
Phoenix and Beauty
constructive algorithms
,
data structures
,
greedy
,
sortings
1400
x25326
1346E
Magic Tricks
*special problem
,
dp
,
graphs
1700
x378
1346D
Constructing the Dungeon
*special problem
,
graphs
,
greedy
1600
x502
1346C
Spring Cleaning
*special problem
,
greedy
,
sortings
1600
x605
1346B
Boot Camp
*special problem
,
greedy
1400
x1205
1344A
Hilbert's Hotel
math
,
number theory
,
sortings
1600
x15633
1343D
Constant Palindrome Sum
brute force
,
data structures
,
greedy
,
two pointers
1700
x12658
1342C
Yet Another Counting Problem
math
,
number theory
1600
x14023
1340B
Nastya and Scoreboard
bitmasks
,
dp
,
graphs
,
greedy
1700
x7851
1340A
Nastya and Strange Generator
brute force
,
data structures
,
greedy
,
implementation
1500
x13415
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