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Contest is running
Codeforces Round 876 (Div. 2)
01:12:04
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Codeforces Round 877 (Div. 2)
23:12:04
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dp
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
1773L
Lisa's Sequences
dp
3500
x20
1776E
Crossing the Railways
data structures
,
dp
3500
x26
1170I
Good Subsets
*special problem
,
dp
x28
1431J
Zero-XOR Array
*special problem
,
dp
3400
x34
1211H
Road Repair in Treeland
*special problem
,
binary search
,
dp
,
trees
3100
x34
1297H
Paint the String
*special problem
,
dp
,
strings
x36
1346I
Pac-Man 2.0
*special problem
,
dp
2900
x37
1403C
Chess Rush
*special problem
,
combinatorics
,
dp
,
implementation
,
math
3200
x38
1830F
The Third Grace
data structures
,
dp
x41
1776K
Uniform Chemistry
dp
,
math
3200
x45
765G
Math, math everywhere
brute force
,
dp
,
math
,
meet-in-the-middle
,
number theory
3200
x50
1517H
Fly Around the World
dp
,
geometry
3500
x55
1750H
BinaryStringForces
constructive algorithms
,
data structures
,
dp
3500
x57
1326G
Spiderweb Trees
dp
,
geometry
,
trees
3500
x57
1545F
AquaMoon and Potatoes
brute force
,
data structures
,
dp
3500
x58
1654H
Three Minimums
combinatorics
,
constructive algorithms
,
divide and conquer
,
dp
,
fft
,
math
3500
x59
1761F2
Anti-median (Hard Version)
combinatorics
,
dp
,
math
3500
x60
1571G
A Battle Against a Dragon
*special problem
,
data structures
,
dp
2500
x60
1545E1
AquaMoon and Time Stop (easy version)
data structures
,
dp
3500
x60
1297G
M-numbers
*special problem
,
dp
,
math
x60
457F
An easy problem about trees
dp
,
games
,
greedy
,
trees
3200
x67
1545E2
AquaMoon and Time Stop (hard version)
data structures
,
dp
3500
x70
1349E
Slime and Hats
constructive algorithms
,
dp
,
greedy
3500
x70
1533H
Submatrices
*special problem
,
bitmasks
,
data structures
,
dp
x73
1218A
BubbleReactor
dp
,
graphs
2800
x73
1322F
Assigning Fares
dp
,
trees
3500
x76
1677F
Tokitsukaze and Gems
dp
,
math
3500
x77
1746G
Olympiad Training
binary search
,
data structures
,
dp
,
flows
,
geometry
,
implementation
,
sortings
3500
x78
1740I
Arranging Crystal Balls
data structures
,
divide and conquer
,
divide and conquer
,
dp
,
geometry
,
graphs
,
number theory
3500
x78
1510H
Hard Optimization
dp
3200
x78
1237G
Balanced Distribution
data structures
,
dp
,
greedy
3500
x81
1097H
Mateusz and an Infinite Sequence
bitmasks
,
brute force
,
dp
,
strings
3400
x85
1819F
Willy-nilly, Crack, Into Release!
data structures
,
dp
3500
x87
1266H
Red-Blue Graph
dp
,
graphs
,
math
,
matrices
,
meet-in-the-middle
3400
x89
1349F2
Slime and Sequences (Hard Version)
dp
,
fft
,
math
3500
x92
774I
Composing Of String
*special problem
,
dp
2300
x92
1566H
Xor-quiz
constructive algorithms
,
dp
,
interactive
,
math
,
number theory
3200
x94
1696H
Maximum Product?
brute force
,
combinatorics
,
dp
,
greedy
,
implementation
,
math
,
two pointers
3500
x96
1530H
Turing's Award
data structures
,
dp
3400
x98
336E
Vasily the Bear and Painting Square
bitmasks
,
combinatorics
,
dp
,
implementation
2700
x98
251E
Tree and Table
dfs and similar
,
dp
,
implementation
,
trees
3000
x99
924F
Minimal Subset Difference
dp
3200
x100
1444E
Finding the Vertex
brute force
,
dfs and similar
,
dp
,
interactive
,
trees
3500
x106
1250D
Conference Problem
dp
3000
x106
865E
Hex Dyslexia
bitmasks
,
brute force
,
dp
,
graphs
3300
x106
1387C
Viruses
*special problem
,
dp
,
shortest paths
,
string suffix structures
2900
x107
852H
Bob and stages
dp
,
geometry
3000
x110
185C
Clever Fat Rat
dp
2500
x110
424E
Colored Jenga
dfs and similar
,
dp
,
probabilities
2500
x111
1804H
Code Lock
bitmasks
,
dp
3300
x115
1585G
Poachers
dp
,
games
,
graphs
,
trees
2500
x115
1707F
Bugaboo
bitmasks
,
constructive algorithms
,
dp
,
number theory
3500
x117
662E
To Hack or not to Hack
brute force
,
dp
,
greedy
3100
x118
1479E
School Clubs
dp
,
fft
,
math
,
number theory
,
probabilities
3500
x119
1431G
Number Deletion Game
*special problem
,
dp
,
games
,
greedy
2100
x121
379G
New Year Cactus
dp
3100
x122
804F
Fake bullions
combinatorics
,
dfs and similar
,
dp
,
graphs
,
number theory
3400
x124
756E
Byteland coins
combinatorics
,
dp
,
math
3200
x126
717B
R3D3’s Summer Adventure
dp
,
greedy
2700
x128
1534H
Lost Nodes
constructive algorithms
,
dp
,
graphs
,
interactive
,
sortings
,
trees
3500
x131
1210G
Mateusz and Escape Room
dp
3500
x131
1750G
Doping
combinatorics
,
dp
,
math
3300
x134
1012F
Passports
dp
,
implementation
3400
x138
933E
A Preponderant Reunion
constructive algorithms
,
dp
3200
x140
1704H1
Game of AI (easy version)
combinatorics
,
constructive algorithms
,
dp
,
fft
,
math
3200
x142
156E
Mrs. Hudson's Pancakes
brute force
,
dp
3000
x144
138E
Hellish Constraints
brute force
,
dp
,
two pointers
2900
x144
1007E
Mini Metro
dp
3400
x146
1787H
Codeforces Scoreboard
binary search
,
data structures
,
dp
,
geometry
3300
x147
1408I
Bitwise Magic
dp
,
math
3200
x147
391F1
Stock Trading
dp
x148
1456E
XOR-ranges
dp
,
greedy
3500
x149
331E2
Deja Vu
constructive algorithms
,
dp
3100
x149
891D
Sloth
dfs and similar
,
dp
,
graph matchings
,
trees
3100
x150
1571F
Kotlinforces
*special problem
,
constructive algorithms
,
dp
2000
x152
1218C
Jumping Transformers
dp
2600
x152
1761F1
Anti-median (Easy Version)
dp
,
math
3100
x155
1553I
Stairs
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
3400
x155
773F
Test Data Generation
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x155
980F
Cactus to Tree
dp
,
graphs
,
trees
2900
x157
833E
Caramel Clouds
data structures
,
dp
,
sortings
3400
x158
581E
Kojiro and Furrari
dp
,
greedy
2800
x160
720D
Slalom
data structures
,
dp
,
sortings
3100
x161
1603F
October 18, 2017
combinatorics
,
dp
,
implementation
,
math
2700
x162
1832F
Zombies
binary search
,
dp
3200
x165
280E
Sequence Transformation
brute force
,
data structures
,
dp
,
implementation
,
math
3000
x165
1474F
1 2 3 4 ...
dp
,
math
,
matrices
3000
x169
855G
Harry Vs Voldemort
dfs and similar
,
dp
,
graphs
,
trees
3300
x171
1815E
Bosco and Particle
dp
,
math
,
number theory
,
strings
3100
x172
1799H
Tree Cutting
bitmasks
,
dfs and similar
,
dp
3200
x173
1523H
Hopping Around the Array
data structures
,
dp
3500
x173
1268E
Happy Cactus
dp
3400
x173
1194G
Another Meme Problem
dp
2700
x173
1500F
Cupboards Jumps
dp
3500
x174
1488E
Palindromic Doubles
*special problem
,
data structures
,
dp
2200
x177
1466H
Finding satisfactory solutions
combinatorics
,
dp
,
graphs
,
greedy
,
math
3300
x180
1450G
Communism
bitmasks
,
dp
,
trees
3500
x181
1402C
Star Trek
*special problem
,
combinatorics
,
dfs and similar
,
dp
,
games
,
graphs
,
matrices
,
trees
2600
x181
914H
Ember and Storm's Tree Game
combinatorics
,
dp
,
games
,
trees
3400
x183
848E
Days of Floral Colours
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
3400
x183
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