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Before contest
Codeforces Round #793 (Div. 2)
3 days
→ Filter Problems
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
1349E
Slime and Hats
constructive algorithms
,
dp
,
greedy
3500
x61
1305H
Kuroni the Private Tutor
binary search
,
greedy
3500
x62
1237G
Balanced Distribution
data structures
,
dp
,
greedy
3500
x71
1456E
XOR-ranges
dp
,
greedy
3500
x116
1637H
Minimize Inversions Number
data structures
,
greedy
,
math
,
sortings
3500
x144
1292E
Rin and The Unknown Flower
constructive algorithms
,
greedy
,
interactive
,
math
3500
x188
1548E
Gregor and the Two Painters
data structures
,
divide and conquer
,
graphs
,
greedy
,
math
3400
x121
1097E
Egor and an RPG game
constructive algorithms
,
greedy
3400
x354
1477E
Nezzar and Tournaments
data structures
,
greedy
3300
x89
737E
Tanya is 5!
graph matchings
,
graphs
,
greedy
,
schedules
3300
x91
1209H
Moving Walkways
data structures
,
greedy
,
math
3300
x98
1329E
Dreamoon Loves AA
binary search
,
greedy
3300
x116
1610G
AmShZ Wins a Bet
data structures
,
greedy
,
hashing
3300
x132
1556H
DIY Tree
graphs
,
greedy
,
math
,
probabilities
3300
x136
1054G
New Road Network
constructive algorithms
,
greedy
,
math
3300
x144
1466H
Finding satisfactory solutions
combinatorics
,
dp
,
graphs
,
greedy
,
math
3300
x152
1416F
Showing Off
flows
,
graph matchings
,
greedy
,
implementation
3300
x161
1368H1
Breadboard Capacity (easy version)
dp
,
flows
,
greedy
3300
x166
1408H
Rainbow Triples
binary search
,
data structures
,
flows
,
greedy
3300
x176
671E
Organizing a Race
data structures
,
greedy
3300
x209
526G
Spiders Evil Plan
greedy
,
trees
3300
x457
457F
An easy problem about trees
dp
,
games
,
greedy
,
trees
3200
x62
1089J
JS Minification
greedy
,
implementation
3200
x96
1638F
Two Posters
brute force
,
data structures
,
greedy
,
two pointers
3200
x129
1427F
Boring Card Game
data structures
,
greedy
,
trees
3200
x129
1416E
Split
binary search
,
data structures
,
dp
,
greedy
3200
x167
1495E
Qingshan and Daniel
brute force
,
data structures
,
greedy
,
implementation
3200
x198
538H
Summer Dichotomy
2-sat
,
data structures
,
dfs and similar
,
greedy
3200
x413
650E
Clockwork Bomb
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
3200
x423
573E
Bear and Bowling
data structures
,
greedy
3200
x604
662E
To Hack or not to Hack
brute force
,
dp
,
greedy
3100
x101
1250I
Show Must Go On
binary search
,
brute force
,
greedy
,
shortest paths
3100
x112
1120F
Secret Letters
data structures
,
dp
,
greedy
3100
x133
1190E
Tokitsukaze and Explosion
binary search
,
greedy
3100
x178
1610H
Squid Game
data structures
,
dfs and similar
,
greedy
,
trees
3100
x180
1067D
Computer Game
dp
,
greedy
,
math
,
probabilities
3100
x207
1647F
Madoka and Laziness
dp
,
greedy
3100
x219
1566G
Four Vertices
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
3100
x232
1481F
AB Tree
dp
,
greedy
,
trees
3100
x250
1225G
To Make 1
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
number theory
3100
x258
700D
Huffman Coding on Segment
data structures
,
greedy
3100
x340
626G
Raffles
data structures
,
dp
,
greedy
,
math
3100
x387
704D
Captain America
flows
,
greedy
3100
x466
1458D
Flip and Reverse
data structures
,
graphs
,
greedy
3100
x475
856F
To Play or not to Play
greedy
3000
x49
1672I
PermutationForces
data structures
,
greedy
3000
x55
167D
Wizards and Roads
data structures
,
divide and conquer
,
graph matchings
,
graphs
,
greedy
3000
x161
1181E2
A Story of One Country (Hard)
brute force
,
greedy
,
sortings
3000
x199
936D
World of Tank
dp
,
greedy
3000
x222
1411F
The Thorny Path
greedy
,
math
3000
x226
533A
Berland Miners
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
3000
x227
335F
Buy One, Get One Free
dp
,
greedy
3000
x235
1609G
A Stroll Around the Matrix
data structures
,
greedy
,
math
3000
x253
1558E
Down Below
binary search
,
dfs and similar
,
graphs
,
greedy
,
meet-in-the-middle
,
shortest paths
3000
x278
1381D
The Majestic Brown Tree Snake
dfs and similar
,
dp
,
greedy
,
trees
,
two pointers
3000
x287
1637G
Birthday
constructive algorithms
,
greedy
,
math
3000
x304
771E
Bear and Rectangle Strips
dp
,
greedy
3000
x316
341E
Candies Game
constructive algorithms
,
greedy
3000
x328
1442E
Black, White and Grey Tree
binary search
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
3000
x336
1534F2
Falling Sand (Hard Version)
dfs and similar
,
dp
,
graphs
,
greedy
3000
x361
1428G2
Lucky Numbers (Hard Version)
dp
,
greedy
3000
x385
1149D
Abandoning Roads
brute force
,
dp
,
graphs
,
greedy
3000
x399
1446D2
Frequency Problem (Hard Version)
data structures
,
greedy
,
two pointers
3000
x646
89E
Fire and Ice
greedy
2900
x64
187E
Heaven Tour
data structures
,
greedy
2900
x74
183E
Candy Shop
greedy
2900
x103
871E
Restore the Tree
graphs
,
greedy
,
trees
2900
x104
309E
Sheep
binary search
,
greedy
2900
x104
736E
Chess Championship
constructive algorithms
,
flows
,
greedy
,
math
2900
x153
1654G
Snowy Mountain
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
2900
x167
1051G
Distinctification
data structures
,
dsu
,
greedy
2900
x198
1452F
Divide Powers
constructive algorithms
,
greedy
2900
x214
1646F
Playing Around the Table
constructive algorithms
,
greedy
,
implementation
2900
x221
1361D
Johnny and James
greedy
,
implementation
,
math
,
trees
2900
x256
725F
Family Photos
games
,
greedy
2900
x275
1487F
Ones
dp
,
greedy
,
shortest paths
2900
x285
1601E
Phys Ed Online
data structures
,
dp
,
greedy
2900
x291
321D
Ciel and Flipboard
dp
,
greedy
,
math
2900
x326
1428G1
Lucky Numbers (Easy Version)
dp
,
greedy
2900
x366
343E
Pumping Stations
brute force
,
dfs and similar
,
divide and conquer
,
flows
,
graphs
,
greedy
,
trees
2900
x441
1580D
Subsequence
brute force
,
divide and conquer
,
dp
,
greedy
,
trees
2900
x456
1198F
GCD Groups 2
greedy
,
number theory
,
probabilities
2900
x496
1372E
Omkar and Last Floor
dp
,
greedy
,
two pointers
2900
x720
671D
Roads in Yusland
data structures
,
dp
,
greedy
2900
x793
724E
Goods transportation
dp
,
flows
,
greedy
2900
x882
505E
Mr. Kitayuta vs. Bamboos
binary search
,
greedy
2900
x915
48F
Snow sellers
greedy
,
sortings
2800
x75
290F
Greedy Petya
*special problem
,
dfs and similar
,
graphs
,
greedy
2800
x85
859F
Ordering T-Shirts
greedy
2800
x118
796F
Sequence Recovery
bitmasks
,
data structures
,
greedy
2800
x132
581E
Kojiro and Furrari
dp
,
greedy
2800
x150
625E
Frog Fights
data structures
,
greedy
2800
x184
11E
Forward, march!
binary search
,
dp
,
greedy
2800
x205
1572D
Bridge Club
flows
,
graph matchings
,
graphs
,
greedy
2800
x243
850D
Tournament Construction
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
2800
x272
240E
Road Repairs
dfs and similar
,
graphs
,
greedy
2800
x276
1592F2
Alice and Recoloring 2
constructive algorithms
,
flows
,
graph matchings
,
greedy
2800
x299
1620F
Bipartite Array
dp
,
greedy
2800
x319
1455F
String and Operations
dp
,
greedy
2800
x322
196D
The Next Good String
data structures
,
greedy
,
hashing
,
strings
2800
x326
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