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Before contest
Codeforces Round #793 (Div. 2)
02:26:56
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Difficulty:
—
greedy
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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Custom test
Problems
#
Name
100J
Interval Coloring
*special problem
,
greedy
,
math
2400
x44
856F
To Play or not to Play
greedy
3000
x49
1431H
Rogue-like Game
*special problem
,
brute force
,
greedy
,
two pointers
2600
x53
1672I
PermutationForces
data structures
,
greedy
3000
x56
1349E
Slime and Hats
constructive algorithms
,
dp
,
greedy
3500
x61
391F2
Stock Trading
greedy
x61
1305H
Kuroni the Private Tutor
binary search
,
greedy
3500
x62
457F
An easy problem about trees
dp
,
games
,
greedy
,
trees
3200
x62
89E
Fire and Ice
greedy
2900
x64
1237G
Balanced Distribution
data structures
,
dp
,
greedy
3500
x71
187E
Heaven Tour
data structures
,
greedy
2900
x74
48F
Snow sellers
greedy
,
sortings
2800
x75
290F
Greedy Petya
*special problem
,
dfs and similar
,
graphs
,
greedy
2800
x85
1477E
Nezzar and Tournaments
data structures
,
greedy
3300
x89
72F
Oil
*special problem
,
greedy
,
math
1900
x90
45F
Goats and Wolves
greedy
2500
x90
1488G
Painting Numbers
*special problem
,
data structures
,
greedy
,
number theory
2500
x91
737E
Tanya is 5!
graph matchings
,
graphs
,
greedy
,
schedules
3300
x91
1662B
Toys
greedy
,
strings
x92
1156G
Optimizer
graphs
,
greedy
,
hashing
,
implementation
2700
x93
1089J
JS Minification
greedy
,
implementation
3200
x96
1209H
Moving Walkways
data structures
,
greedy
,
math
3300
x98
1170F
Wheels
*special problem
,
binary search
,
greedy
x100
1297F
Movie Fan
*special problem
,
data structures
,
greedy
,
implementation
,
sortings
x101
662E
To Hack or not to Hack
brute force
,
dp
,
greedy
3100
x101
183E
Candy Shop
greedy
2900
x103
871E
Restore the Tree
graphs
,
greedy
,
trees
2900
x104
309E
Sheep
binary search
,
greedy
2900
x104
1250I
Show Must Go On
binary search
,
brute force
,
greedy
,
shortest paths
3100
x112
1431G
Number Deletion Game
*special problem
,
dp
,
games
,
greedy
2100
x113
717B
R3D3’s Summer Adventure
dp
,
greedy
2700
x115
1456E
XOR-ranges
dp
,
greedy
3500
x116
1329E
Dreamoon Loves AA
binary search
,
greedy
3300
x116
887F
Row of Models
greedy
,
sortings
2500
x118
859F
Ordering T-Shirts
greedy
2800
x118
391C2
The Tournament
greedy
x118
1548E
Gregor and the Two Painters
data structures
,
divide and conquer
,
graphs
,
greedy
,
math
3400
x121
1638F
Two Posters
brute force
,
data structures
,
greedy
,
two pointers
3200
x130
1427F
Boring Card Game
data structures
,
greedy
,
trees
3200
x130
796F
Sequence Recovery
bitmasks
,
data structures
,
greedy
2800
x132
1610G
AmShZ Wins a Bet
data structures
,
greedy
,
hashing
3300
x133
1120F
Secret Letters
data structures
,
dp
,
greedy
3100
x133
1556H
DIY Tree
graphs
,
greedy
,
math
,
probabilities
3300
x137
1431F
Neural Network Problem
*special problem
,
binary search
,
greedy
2100
x139
1054G
New Road Network
constructive algorithms
,
greedy
,
math
3300
x144
1637H
Minimize Inversions Number
data structures
,
greedy
,
math
,
sortings
3500
x145
581E
Kojiro and Furrari
dp
,
greedy
2800
x150
1466H
Finding satisfactory solutions
combinatorics
,
dp
,
graphs
,
greedy
,
math
3300
x152
736E
Chess Championship
constructive algorithms
,
flows
,
greedy
,
math
2900
x153
72A
Goshtasp, Vishtasp and Eidi
*special problem
,
greedy
,
math
1800
x155
1416F
Showing Off
flows
,
graph matchings
,
greedy
,
implementation
3300
x161
167D
Wizards and Roads
data structures
,
divide and conquer
,
graph matchings
,
graphs
,
greedy
3000
x161
1368H1
Breadboard Capacity (easy version)
dp
,
flows
,
greedy
3300
x166
1416E
Split
binary search
,
data structures
,
dp
,
greedy
3200
x167
1654G
Snowy Mountain
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
2900
x168
1211E
Double Permutation Inc.
*special problem
,
binary search
,
greedy
2000
x168
1408H
Rainbow Triples
binary search
,
data structures
,
flows
,
greedy
3300
x176
1211D
Teams
*special problem
,
binary search
,
greedy
,
math
2000
x178
1190E
Tokitsukaze and Explosion
binary search
,
greedy
3100
x178
207A3
Beaver's Calculator 1.0
greedy
2000
x179
1610H
Squid Game
data structures
,
dfs and similar
,
greedy
,
trees
3100
x180
625E
Frog Fights
data structures
,
greedy
2800
x184
207A2
Beaver's Calculator 1.0
greedy
1800
x186
1292E
Rin and The Unknown Flower
constructive algorithms
,
greedy
,
interactive
,
math
3500
x188
1533F
Binary String Partition
*special problem
,
binary search
,
greedy
x197
1051G
Distinctification
data structures
,
dsu
,
greedy
2900
x198
1495E
Qingshan and Daniel
brute force
,
data structures
,
greedy
,
implementation
3200
x199
1181E2
A Story of One Country (Hard)
brute force
,
greedy
,
sortings
3000
x199
1346F
Dune II: Battle For Arrakis
*special problem
,
data structures
,
greedy
,
math
2000
x203
370E
Summer Reading
dp
,
greedy
2500
x203
11E
Forward, march!
binary search
,
dp
,
greedy
2800
x205
191D
Metro Scheme
graphs
,
greedy
2700
x206
1067D
Computer Game
dp
,
greedy
,
math
,
probabilities
3100
x207
671E
Organizing a Race
data structures
,
greedy
3300
x210
1452F
Divide Powers
constructive algorithms
,
greedy
2900
x214
1599J
Bob's Beautiful Array
bitmasks
,
brute force
,
greedy
2600
x215
1647F
Madoka and Laziness
dp
,
greedy
3100
x219
1662G
Gastronomic Event
dp
,
greedy
,
trees
x221
1646F
Playing Around the Table
constructive algorithms
,
greedy
,
implementation
2900
x221
936D
World of Tank
dp
,
greedy
3000
x222
207A1
Beaver's Calculator 1.0
greedy
1600
x222
175E
Power Defence
brute force
,
dp
,
geometry
,
greedy
2600
x222
1571E
Fix the String
*special problem
,
bitmasks
,
dp
,
greedy
1700
x225
173D
Deputies
constructive algorithms
,
graphs
,
greedy
,
implementation
2500
x225
91D
Grocer's Problem
constructive algorithms
,
graphs
,
greedy
2600
x226
1411F
The Thorny Path
greedy
,
math
3000
x227
533A
Berland Miners
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
3000
x227
566B
Replicating Processes
constructive algorithms
,
greedy
2600
x228
1566G
Four Vertices
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
3100
x232
335F
Buy One, Get One Free
dp
,
greedy
3000
x235
1297D
Bonus Distribution
*special problem
,
binary search
,
greedy
,
sortings
x240
1572D
Bridge Club
flows
,
graph matchings
,
graphs
,
greedy
2800
x243
203E
Transportation
greedy
,
sortings
,
two pointers
2300
x244
1468L
Prime Divisors Selection
binary search
,
greedy
,
math
,
number theory
2700
x245
991F
Concise and clear
brute force
,
greedy
,
implementation
,
math
2700
x246
64D
Presents
*special problem
,
greedy
1800
x247
1481F
AB Tree
dp
,
greedy
,
trees
3100
x250
1609G
A Stroll Around the Matrix
data structures
,
greedy
,
math
3000
x253
1533E
Chess Team Forming
*special problem
,
binary search
,
data structures
,
greedy
x254
1452G
Game On Tree
data structures
,
dfs and similar
,
greedy
,
trees
2700
x255
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