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Name
1415E
New Game Plus!
constructive algorithms
,
greedy
,
math
2200
x2572
1415D
XOR-gun
bitmasks
,
brute force
,
constructive algorithms
2000
x5163
1415C
Bouncing Ball
brute force
,
dp
,
implementation
1400
x10640
1415B
Repainting Street
brute force
,
brute force
,
greedy
1100
x11995
1415A
Prison Break
brute force
,
math
800
x14916
1413F
Roads and Ramen
data structures
,
trees
2800
x702
1413E
Solo mid Oracle
greedy
,
math
,
ternary search
2100
x1907
1413D
Shurikens
data structures
,
greedy
,
implementation
1700
x6331
1413C
Perform Easily
binary search
,
brute force
,
dp
,
implementation
,
sortings
,
two pointers
1900
x5527
1413B
A New Technique
implementation
1100
x11600
1413A
Finding Sasuke
constructive algorithms
,
math
800
x14582
1411G
No Game No Life
bitmasks
,
games
,
math
,
matrices
2700
x578
1411F
The Thorny Path
greedy
,
math
3000
x319
1411E
Poman Numbers
bitmasks
,
greedy
,
math
,
strings
2300
x1554
1411D
Grime Zoo
brute force
,
greedy
,
implementation
,
strings
2100
x2426
1411C
Peaceful Rooks
dfs and similar
,
dsu
,
graphs
1700
x7759
1411B
Fair Numbers
brute force
,
number theory
1000
x17753
1411A
In-game Chat
implementation
800
x20132
1409F
Subsequences of Length Two
dp
,
strings
2100
x4265
1409E
Two Platforms
binary search
,
dp
,
sortings
,
two pointers
1800
x7541
1409D
Decrease the Sum of Digits
greedy
,
math
1500
x18655
1409C
Yet Another Array Restoration
brute force
,
math
,
number theory
1200
x22722
1409B
Minimum Product
brute force
,
greedy
,
math
1100
x28222
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x62390
1408I
Bitwise Magic
dp
,
math
3200
x166
1408H
Rainbow Triples
binary search
,
data structures
,
flows
,
greedy
3300
x352
1408G
Clusterization Counting
combinatorics
,
dp
,
dsu
,
fft
,
graphs
,
trees
2700
x926
1408F
Two Different
constructive algorithms
,
divide and conquer
2300
x2259
1408E
Avoid Rainbow Cycles
data structures
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2400
x1874
1408D
Searchlights
binary search
,
brute force
,
data structures
,
dp
,
implementation
,
sortings
,
two pointers
2000
x4157
1408C
Discrete Acceleration
binary search
,
dp
,
implementation
,
math
,
two pointers
1500
x8621
1408B
Arrays Sum
constructive algorithms
,
greedy
,
math
1400
x9753
1408A
Circle Coloring
constructive algorithms
800
x12390
1407E
Egor in the Republic of Dagestan
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
2500
x1600
1407D
Discrete Centrifugal Jumps
data structures
,
dp
,
graphs
2200
x4619
1407C
Chocolate Bunny
constructive algorithms
,
interactive
,
math
,
two pointers
1600
x11384
1407B
Big Vova
brute force
,
greedy
,
math
,
number theory
1300
x16672
1407A
Ahahahahahahahaha
constructive algorithms
,
math
1100
x20068
1406E
Deleting Numbers
interactive
,
math
,
number theory
2600
x1544
1406D
Three Sequences
constructive algorithms
,
data structures
,
greedy
,
math
2200
x3368
1406C
Link Cut Centroids
constructive algorithms
,
dfs and similar
,
graphs
,
trees
1700
x9799
1406B
Maximum Product
brute force
,
dp
,
greedy
,
implementation
,
sortings
1200
x22021
1406A
Subset Mex
greedy
,
implementation
,
math
900
x20930
1405B
Array Cancellation
constructive algorithms
,
implementation
1000
x20985
1405A
Permutation Forgery
constructive algorithms
800
x21237
1404E
Bricks
flows
,
graph matchings
,
graphs
2800
x1089
1404D
Game of Pairs
constructive algorithms
,
dfs and similar
,
interactive
,
math
,
number theory
2800
x982
1404C
Fixed Point Removal
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2300
x2489
1404B
Tree Tag
dfs and similar
,
dp
,
games
,
trees
1900
x7073
1404A
Balanced Bitstring
implementation
,
strings
1500
x14750
1403C
Chess Rush
*special problem
,
combinatorics
,
dp
,
implementation
,
math
3200
x42
1403B
Spring cleaning
*special problem
,
data structures
,
dfs and similar
,
graphs
,
trees
2300
x358
1403A
The Potion of Great Power
*special problem
,
2-sat
,
binary search
,
data structures
,
graphs
,
interactive
,
sortings
,
two pointers
2400
x284
1402C
Star Trek
*special problem
,
combinatorics
,
dfs and similar
,
dp
,
games
,
graphs
,
matrices
,
trees
2600
x195
1402B
Roads
*special problem
,
geometry
,
sortings
2900
x102
1402A
Fancy Fence
*special problem
,
data structures
,
dsu
,
implementation
,
math
,
sortings
1800
x1137
1401F
Reverse and Swap
binary search
,
bitmasks
,
data structures
2400
x1518
1401E
Divide Square
data structures
,
geometry
,
implementation
,
sortings
2400
x2159
1401D
Maximum Distributed Tree
dfs and similar
,
dp
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
trees
1800
x8853
1401C
Mere Array
constructive algorithms
,
math
,
number theory
,
sortings
1300
x23405
1401B
Ternary Sequence
constructive algorithms
,
greedy
,
math
1100
x20728
1401A
Distance and Axis
constructive algorithms
,
math
900
x26874
1400G
Mercenaries
bitmasks
,
brute force
,
combinatorics
,
dp
,
dsu
,
math
,
two pointers
2600
x892
1400F
x-prime Substrings
brute force
,
dfs and similar
,
dp
,
string suffix structures
,
strings
2800
x773
1400E
Clear the Multiset
data structures
,
divide and conquer
,
dp
,
greedy
2200
x5006
1400D
Zigzags
brute force
,
combinatorics
,
data structures
,
math
,
two pointers
1900
x9783
1400C
Binary String Reconstruction
2-sat
,
brute force
,
constructive algorithms
,
greedy
1500
x16720
1400B
RPG Protagonist
brute force
,
greedy
,
math
1700
x10827
1400A
String Similarity
constructive algorithms
,
strings
800
x26540
1399F
Yet Another Segments Subset
data structures
,
dp
,
graphs
,
sortings
2300
x1555
1399E2
Weights Division (hard version)
binary search
,
dfs and similar
,
greedy
,
sortings
,
trees
,
two pointers
2200
x2211
1399E1
Weights Division (easy version)
data structures
,
dfs and similar
,
greedy
,
trees
2000
x5674
1399D
Binary String To Subsequences
constructive algorithms
,
data structures
,
greedy
,
implementation
1500
x17646
1399C
Boats Competition
brute force
,
greedy
,
two pointers
1200
x27733
1399B
Gifts Fixing
greedy
800
x42327
1399A
Remove Smallest
greedy
,
sortings
800
x62615
1398G
Running Competition
bitmasks
,
fft
,
math
,
number theory
2600
x764
1398F
Controversial Rounds
binary search
,
data structures
,
dp
,
greedy
,
two pointers
2500
x1066
1398E
Two Types of Spells
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
2200
x2173
1398D
Colored Rectangles
dp
,
greedy
,
sortings
1800
x10984
1398C
Good Subarrays
data structures
,
dp
,
math
1600
x24096
1398B
Substring Removal Game
games
,
greedy
,
sortings
800
x24054
1398A
Bad Triangle
geometry
,
math
800
x26964
1397B
Power Sequence
brute force
,
math
,
number theory
,
sortings
1500
x14344
1397A
Juggling Letters
greedy
,
strings
800
x28101
1396E
Distance Matching
constructive algorithms
,
dfs and similar
,
trees
3200
x319
1396D
Rainbow Rectangles
data structures
,
sortings
,
two pointers
3300
x297
1396C
Monster Invaders
dp
,
greedy
,
implementation
2300
x2377
1396B
Stoned Game
brute force
,
constructive algorithms
,
games
,
greedy
1800
x10861
1396A
Multiples of Length
constructive algorithms
,
greedy
,
number theory
1600
x14948
1395C
Boboniu and Bit Operations
bitmasks
,
brute force
,
dp
,
greedy
1600
x13495
1395B
Boboniu Plays Chess
constructive algorithms
1100
x15775
1395A
Boboniu Likes to Color Balls
brute force
,
math
1000
x23421
1394E
Boboniu and Banknote Collection
strings
3500
x129
1394D
Boboniu and Jianghu
dp
,
greedy
,
sortings
,
trees
2800
x804
1394C
Boboniu and String
binary search
,
geometry
,
ternary search
2600
x899
1394B
Boboniu Walks on Graph
brute force
,
dfs and similar
,
graphs
,
hashing
2300
x1788
1394A
Boboniu Chats with Du
dp
,
greedy
,
sortings
,
two pointers
1800
x6449
1393E2
Twilight and Ancient Scroll (harder version)
dp
,
hashing
,
implementation
,
string suffix structures
,
strings
,
two pointers
3200
x346
1393E1
Twilight and Ancient Scroll (easier version)
dp
,
hashing
,
implementation
,
string suffix structures
,
strings
2800
x368
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Codeforces Round 943 (Div. 3)
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combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
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combinatorics
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data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
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geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
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number theory
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sortings
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strings
ternary search
trees
two pointers
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