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Before contest
Educational Codeforces Round 165 (Rated for Div. 2)
38:26:48
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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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Status
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Custom test
Problems
#
Name
203E
Transportation
greedy
,
sortings
,
two pointers
2300
x276
1693F
I Might Be Wrong
binary search
,
greedy
,
two pointers
3400
x274
207A1
Beaver's Calculator 1.0
greedy
1600
x271
1533E
Chess Team Forming
*special problem
,
binary search
,
data structures
,
greedy
x268
1456E
XOR-ranges
dp
,
greedy
3500
x268
1416E
Split
binary search
,
data structures
,
dp
,
greedy
3200
x268
1806F2
GCD Master (hard version)
greedy
,
math
,
sortings
2900
x265
175E
Power Defence
brute force
,
dp
,
geometry
,
greedy
2600
x260
91D
Grocer's Problem
constructive algorithms
,
graphs
,
greedy
2600
x260
1466H
Finding satisfactory solutions
combinatorics
,
dp
,
graphs
,
greedy
,
math
3300
x259
566B
Replicating Processes
constructive algorithms
,
greedy
2600
x259
1884E
Hard Design
greedy
,
implementation
,
math
2800
x258
1181E2
A Story of One Country (Hard)
brute force
,
greedy
,
sortings
3000
x258
1297D
Bonus Distribution
*special problem
,
binary search
,
greedy
,
sortings
x257
1054G
New Road Network
constructive algorithms
,
greedy
,
math
3300
x257
1817E
Half-sum
brute force
,
divide and conquer
,
greedy
3400
x249
1120F
Secret Letters
data structures
,
dp
,
greedy
3100
x248
173D
Deputies
constructive algorithms
,
graphs
,
greedy
,
implementation
2500
x246
1868D
Flower-like Pseudotree
constructive algorithms
,
graphs
,
greedy
,
implementation
,
trees
3000
x244
370E
Summer Reading
dp
,
greedy
2500
x228
1211D
Teams
*special problem
,
binary search
,
greedy
,
math
2000
x223
1190E
Tokitsukaze and Explosion
binary search
,
greedy
3100
x221
648D
Собачки и миски
data structures
,
greedy
,
sortings
1900
x221
207A2
Beaver's Calculator 1.0
greedy
1800
x221
1346F
Dune II: Battle For Arrakis
*special problem
,
data structures
,
greedy
,
math
2000
x218
309E
Sheep
binary search
,
greedy
2900
x217
1687E
Become Big For Me
combinatorics
,
constructive algorithms
,
greedy
,
math
,
number theory
3500
x212
1943E2
MEX Game 2 (Hard Version)
binary search
,
greedy
,
two pointers
3300
x209
1533F
Binary String Partition
*special problem
,
binary search
,
greedy
x208
207A3
Beaver's Calculator 1.0
greedy
2000
x201
167D
Wizards and Roads
data structures
,
divide and conquer
,
graph matchings
,
graphs
,
greedy
3000
x190
1638F
Two Posters
brute force
,
data structures
,
greedy
,
two pointers
3200
x189
1211E
Double Permutation Inc.
*special problem
,
binary search
,
greedy
2000
x188
581E
Kojiro and Furrari
dp
,
greedy
2800
x186
736E
Chess Championship
constructive algorithms
,
flows
,
greedy
,
math
2900
x182
72A
Goshtasp, Vishtasp and Eidi
*special problem
,
greedy
,
math
1800
x181
1951H
Thanos Snap
binary search
,
dp
,
games
,
greedy
,
trees
3200
x179
1329E
Dreamoon Loves AA
binary search
,
greedy
3300
x170
796F
Sequence Recovery
bitmasks
,
data structures
,
greedy
2800
x169
1895G
Two Characters, Two Colors
binary search
,
data structures
,
dp
,
flows
,
greedy
3100
x168
887F
Row of Models
greedy
,
sortings
2500
x160
859F
Ordering T-Shirts
greedy
2800
x159
1886F
Diamond Theft
data structures
,
greedy
3300
x158
1852E
Rivalries
constructive algorithms
,
data structures
,
greedy
3400
x157
1910F
Build Railway Stations
*special problem
,
greedy
,
trees
2000
x155
1696H
Maximum Product?
brute force
,
combinatorics
,
dp
,
greedy
,
implementation
,
math
,
two pointers
3500
x153
1431F
Neural Network Problem
*special problem
,
binary search
,
greedy
2100
x152
1861F
Four Suits
binary search
,
bitmasks
,
flows
,
greedy
3200
x146
871E
Restore the Tree
graphs
,
greedy
,
trees
2900
x146
1685E
The Ultimate LIS Problem
data structures
,
greedy
3500
x141
1672I
PermutationForces
data structures
,
greedy
3000
x137
1431G
Number Deletion Game
*special problem
,
dp
,
games
,
greedy
2100
x137
717B
R3D3’s Summer Adventure
dp
,
greedy
2700
x136
1209H
Moving Walkways
data structures
,
greedy
,
math
3300
x135
48F
Snow sellers
greedy
,
sortings
2800
x133
662E
To Hack or not to Hack
brute force
,
dp
,
greedy
3100
x132
1726F
Late For Work (submissions are not allowed)
data structures
,
greedy
,
schedules
,
shortest paths
2900
x131
391C2
The Tournament
greedy
x131
1662B
Toys
greedy
,
strings
x130
183E
Candy Shop
greedy
2900
x130
1250I
Show Must Go On
binary search
,
brute force
,
greedy
,
shortest paths
3100
x126
290F
Greedy Petya
*special problem
,
dfs and similar
,
graphs
,
greedy
2800
x126
45F
Goats and Wolves
greedy
2500
x123
1156G
Optimizer
graphs
,
greedy
,
hashing
,
implementation
2700
x120
1089J
JS Minification
greedy
,
implementation
3200
x120
1237G
Balanced Distribution
data structures
,
dp
,
greedy
3500
x119
737E
Tanya is 5!
graph matchings
,
graphs
,
greedy
,
schedules
3300
x118
1488G
Painting Numbers
*special problem
,
data structures
,
greedy
,
number theory
2500
x117
1477E
Nezzar and Tournaments
data structures
,
greedy
3300
x117
1876G
Clubstep
binary search
,
brute force
,
data structures
,
greedy
,
trees
3500
x116
72F
Oil
*special problem
,
greedy
,
math
1900
x116
1170F
Wheels
*special problem
,
binary search
,
greedy
x115
1297F
Movie Fan
*special problem
,
data structures
,
greedy
,
implementation
,
sortings
x113
1305H
Kuroni the Private Tutor
binary search
,
greedy
3500
x109
1842I
Tenzing and Necklace
divide and conquer
,
dp
,
greedy
3500
x107
1827F
Copium Permutation
constructive algorithms
,
data structures
,
greedy
3500
x106
649E
Автобус
binary search
,
data structures
,
greedy
,
sortings
2100
x103
457F
An easy problem about trees
dp
,
games
,
greedy
,
trees
3200
x103
1685D2
Permutation Weight (Hard Version)
constructive algorithms
,
greedy
3500
x102
391F2
Stock Trading
greedy
x102
856F
To Play or not to Play
greedy
3000
x101
89E
Fire and Ice
greedy
2900
x94
187E
Heaven Tour
data structures
,
greedy
2900
x91
1864I
Future Dominators
graphs
,
greedy
3500
x82
1349E
Slime and Hats
constructive algorithms
,
dp
,
greedy
3500
x81
1870H
Standard Graph Problem
data structures
,
graphs
,
greedy
,
trees
3500
x77
1868E
Min-Sum-Max
constructive algorithms
,
dp
,
greedy
3500
x72
1949H
Division Avoidance
greedy
,
math
x68
1889F
Doremy's Average Tree
data structures
,
dp
,
greedy
,
trees
3500
x68
1868F
LIS?
data structures
,
greedy
,
implementation
3500
x68
1431H
Rogue-like Game
*special problem
,
brute force
,
greedy
,
two pointers
2600
x64
100J
Interval Coloring
*special problem
,
greedy
,
math
2400
x60
1910G
Pool Records
*special problem
,
greedy
2700
x49
1951I
Growing Trees
binary search
,
constructive algorithms
,
flows
,
graphs
,
greedy
3200
x38
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