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Problems
#
Name
1197F
Coloring Game
dp
,
games
,
matrices
2700
x240
1193A
Amusement Park
*special problem
,
dp
,
math
x239
1286F
Harry The Potter
brute force
,
constructive algorithms
,
dp
,
fft
,
implementation
,
math
3100
x235
1523H
Hopping Around the Array
data structures
,
dp
3500
x234
1450G
Communism
bitmasks
,
dp
,
trees
3500
x233
914H
Ember and Storm's Tree Game
combinatorics
,
dp
,
games
,
trees
3400
x230
370E
Summer Reading
dp
,
greedy
2500
x230
1569F
Palindromic Hamiltonian Path
brute force
,
dfs and similar
,
dp
,
graphs
,
hashing
3000
x228
989E
A Trance of Nightfall
dp
,
geometry
,
matrices
,
probabilities
2700
x228
1750G
Doping
combinatorics
,
dp
,
math
3300
x225
1268E
Happy Cactus
dp
3400
x225
720D
Slalom
data structures
,
dp
,
sortings
3100
x224
1830F
The Third Grace
data structures
,
dp
3200
x222
1194G
Another Meme Problem
dp
2700
x220
618G
Combining Slimes
dp
,
math
,
matrices
,
probabilities
3300
x220
62E
World Evil
dp
,
flows
2700
x219
335E
Counting Skyscrapers
dp
,
math
,
probabilities
2800
x218
533D
Landmarks
data structures
,
dp
3000
x216
331E2
Deja Vu
constructive algorithms
,
dp
3100
x216
1954F
Unique Strings
combinatorics
,
dp
,
math
3100
x211
833E
Caramel Clouds
data structures
,
dp
,
sortings
3400
x210
243D
Cubes
data structures
,
dp
,
geometry
,
two pointers
2700
x208
1488E
Palindromic Doubles
*special problem
,
data structures
,
dp
2200
x206
1835E
Old Mobile
combinatorics
,
dp
,
probabilities
3500
x203
1951H
Thanos Snap
binary search
,
dp
,
games
,
greedy
,
trees
3200
x201
1787H
Codeforces Scoreboard
binary search
,
data structures
,
dp
,
geometry
3300
x201
848E
Days of Floral Colours
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
3400
x201
855G
Harry Vs Voldemort
dfs and similar
,
dp
,
graphs
,
trees
3300
x199
1761F1
Anti-median (Easy Version)
dp
,
math
3100
x198
1402C
Star Trek
*special problem
,
combinatorics
,
dfs and similar
,
dp
,
games
,
graphs
,
matrices
,
trees
2600
x198
280E
Sequence Transformation
brute force
,
data structures
,
dp
,
implementation
,
math
3000
x198
1553I
Stairs
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
3400
x195
980F
Cactus to Tree
dp
,
graphs
,
trees
2900
x192
1479E
School Clubs
dp
,
fft
,
math
,
number theory
,
probabilities
3500
x189
581E
Kojiro and Furrari
dp
,
greedy
2800
x187
1970G3
Min-Fund Prison (Hard)
bitmasks
,
dfs and similar
,
dp
,
graphs
,
trees
2400
x185
933E
A Preponderant Reunion
constructive algorithms
,
dp
3200
x185
773F
Test Data Generation
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x184
1893E
Cacti Symphony
combinatorics
,
dfs and similar
,
dp
,
graphs
3500
x179
1571F
Kotlinforces
*special problem
,
constructive algorithms
,
dp
2000
x177
1910E
Maximum Sum Subarrays
*special problem
,
dp
2100
x175
1895G
Two Characters, Two Colors
binary search
,
data structures
,
dp
,
flows
,
greedy
3100
x173
1585G
Poachers
dp
,
games
,
graphs
,
trees
2500
x171
1218C
Jumping Transformers
dp
2600
x171
1704H1
Game of AI (easy version)
combinatorics
,
constructive algorithms
,
dp
,
fft
,
math
3200
x170
1804H
Code Lock
bitmasks
,
dp
3300
x169
891D
Sloth
dfs and similar
,
dp
,
graph matchings
,
trees
3100
x169
251E
Tree and Table
dfs and similar
,
dp
,
implementation
,
trees
3000
x168
1408I
Bitwise Magic
dp
,
math
3200
x166
1250D
Conference Problem
dp
3000
x165
1007E
Mini Metro
dp
3400
x165
138E
Hellish Constraints
brute force
,
dp
,
two pointers
2900
x165
391F1
Stock Trading
dp
x162
156E
Mrs. Hudson's Pancakes
brute force
,
dp
3000
x160
1874F
Jellyfish and OEIS
dp
3500
x157
924F
Minimal Subset Difference
dp
3200
x157
1210G
Mateusz and Escape Room
dp
3500
x155
1696H
Maximum Product?
brute force
,
combinatorics
,
dp
,
greedy
,
implementation
,
math
,
two pointers
3500
x153
1012F
Passports
dp
,
implementation
3400
x152
756E
Byteland coins
combinatorics
,
dp
,
math
3200
x152
852H
Bob and stages
dp
,
geometry
3000
x148
1707F
Bugaboo
bitmasks
,
constructive algorithms
,
dp
,
number theory
3500
x144
1534H
Lost Nodes
constructive algorithms
,
dp
,
graphs
,
interactive
,
sortings
,
trees
3500
x143
1530H
Turing's Award
data structures
,
dp
3400
x140
1431G
Number Deletion Game
*special problem
,
dp
,
games
,
greedy
2100
x139
379G
New Year Cactus
dp
3100
x139
717B
R3D3’s Summer Adventure
dp
,
greedy
2700
x138
804F
Fake bullions
combinatorics
,
dfs and similar
,
dp
,
graphs
,
number theory
3400
x137
1916G
Optimizations From Chelsu
divide and conquer
,
dp
,
number theory
,
trees
3500
x132
1444E
Finding the Vertex
brute force
,
dfs and similar
,
dp
,
interactive
,
trees
3500
x132
662E
To Hack or not to Hack
brute force
,
dp
,
greedy
3100
x132
1844H
Multiple of Three Cycles
combinatorics
,
data structures
,
dp
,
dsu
,
math
3400
x131
185C
Clever Fat Rat
dp
2500
x130
1924F
Anti-Proxy Attendance
constructive algorithms
,
dp
,
interactive
,
ternary search
3500
x129
1819F
Willy-nilly, Crack, Into Release!
data structures
,
dp
3500
x127
424E
Colored Jenga
dfs and similar
,
dp
,
probabilities
2500
x127
1387C
Viruses
*special problem
,
dp
,
shortest paths
,
string suffix structures
2900
x125
1566H
Xor-quiz
constructive algorithms
,
dp
,
interactive
,
math
,
number theory
3200
x123
1967E1
Again Counting Arrays (Easy Version)
combinatorics
,
dp
,
fft
,
math
3100
x120
1237G
Balanced Distribution
data structures
,
dp
,
greedy
3500
x120
865E
Hex Dyslexia
bitmasks
,
brute force
,
dp
,
graphs
3300
x119
1969F
Card Pairing
dp
,
greedy
,
hashing
,
implementation
3000
x114
1854F
Mark and Spaceship
brute force
,
dp
3500
x112
336E
Vasily the Bear and Painting Square
bitmasks
,
combinatorics
,
dp
,
implementation
2700
x109
1842I
Tenzing and Necklace
divide and conquer
,
dp
,
greedy
3500
x108
1349F2
Slime and Sequences (Hard Version)
dp
,
fft
,
math
3500
x107
1218A
BubbleReactor
dp
,
graphs
2800
x107
1740I
Arranging Crystal Balls
data structures
,
divide and conquer
,
divide and conquer
,
dp
,
geometry
,
graphs
,
number theory
3500
x105
1545F
AquaMoon and Potatoes
brute force
,
data structures
,
dp
3500
x105
457F
An easy problem about trees
dp
,
games
,
greedy
,
trees
3200
x103
774I
Composing Of String
*special problem
,
dp
2300
x100
1852F
Panda Meetups
data structures
,
dp
,
flows
3500
x99
1266H
Red-Blue Graph
dp
,
graphs
,
math
,
matrices
,
meet-in-the-middle
3400
x99
1510H
Hard Optimization
dp
3200
x97
1097H
Mateusz and an Infinite Sequence
bitmasks
,
brute force
,
dp
,
strings
3400
x93
1322F
Assigning Fares
dp
,
trees
3500
x89
1896H2
Cyclic Hamming (Hard Version)
brute force
,
dp
,
fft
,
math
,
number theory
3500
x88
1746G
Olympiad Training
binary search
,
data structures
,
dp
,
flows
,
geometry
,
implementation
,
sortings
3500
x88
1677F
Tokitsukaze and Gems
dp
,
math
3500
x86
1349E
Slime and Hats
constructive algorithms
,
dp
,
greedy
3500
x86
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binary search
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constructive algorithms
data structures
dfs and similar
divide and conquer
dp
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expression parsing
fft
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games
geometry
graph matchings
graphs
greedy
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