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Before contest
Codeforces Round #794 (Div. 1)
15:58:12
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Before contest
Codeforces Round #794 (Div. 2)
15:58:12
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→ Filter Problems
Difficulty:
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games
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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Problems
#
Name
1684A
Digit Minimization
constructive algorithms
,
games
,
math
,
strings
800
x16980
1681A
Game with Cards
games
,
greedy
800
x14922
1673A
Subtle Substring Subtraction
games
,
greedy
,
strings
800
x14944
1672A
Log Chopping
games
,
implementation
,
math
800
x12763
1665D
GCD Guess
bitmasks
,
chinese remainder theorem
,
constructive algorithms
,
games
,
interactive
,
math
,
number theory
2000
x2419
1659F
Tree and Permutation Game
dfs and similar
,
games
,
graphs
,
trees
3000
x78
1658E
Gojou and Matrix Game
data structures
,
dp
,
games
,
hashing
,
implementation
,
math
,
number theory
,
sortings
2500
x679
1628D2
Game on Sum (Hard Version)
combinatorics
,
dp
,
games
,
math
2400
x1285
1628D1
Game on Sum (Easy Version)
combinatorics
,
dp
,
games
,
math
2100
x2078
1627B
Not Sitting
games
,
greedy
,
sortings
1300
x13124
1617E
Christmas Chocolates
dfs and similar
,
dp
,
games
,
graphs
,
implementation
,
math
,
number theory
,
shortest paths
,
trees
2700
x590
1615E
Purple Crayon
data structures
,
dfs and similar
,
games
,
graphs
,
greedy
,
math
,
sortings
,
trees
2400
x1093
1610I
Mashtali vs AtCoder
games
,
trees
3100
x196
1605D
Treelabeling
bitmasks
,
constructive algorithms
,
dfs and similar
,
games
,
greedy
,
implementation
,
trees
2100
x2242
1600E
Array Game
games
,
greedy
,
two pointers
1900
x1308
1585G
Poachers
dp
,
games
,
graphs
,
trees
2500
x64
1584E
Game with Stones
binary search
,
data structures
,
games
,
greedy
2300
x988
1537D
Deleting Divisors
games
,
math
,
number theory
1700
x9356
1536F
Omkar and Akmar
chinese remainder theorem
,
combinatorics
,
constructive algorithms
,
fft
,
games
,
geometry
,
math
,
meet-in-the-middle
,
string suffix structures
2600
x724
1527B2
Palindrome Game (hard version)
constructive algorithms
,
games
1900
x6189
1527B1
Palindrome Game (easy version)
constructive algorithms
,
games
1200
x18233
1511G
Chips on a Board
bitmasks
,
brute force
,
data structures
,
dp
,
games
,
two pointers
2700
x440
1503B
3-Coloring
constructive algorithms
,
games
,
interactive
1700
x5953
1498F
Christmas Game
bitmasks
,
data structures
,
dfs and similar
,
dp
,
games
,
math
,
trees
2500
x498
1495B
Let's Go Hiking
games
,
greedy
1900
x5107
1480A
Yet Another String Game
games
,
greedy
,
strings
800
x22470
1472D
Even-Odd Game
dp
,
games
,
greedy
,
sortings
1200
x19765
1458E
Nim Shortcuts
data structures
,
games
3100
x253
1455C
Ping-pong
constructive algorithms
,
games
,
math
1100
x16997
1451F
Nullify The Matrix
constructive algorithms
,
games
2700
x692
1451D
Circle Game
games
,
geometry
,
math
1700
x7951
1442F
Differentiating Games
games
,
interactive
3400
x55
1439E
Cheat and Win
bitmasks
,
data structures
,
games
,
trees
3500
x92
1434E
A Convex Game
dsu
,
games
3500
x83
1431G
Number Deletion Game
*special problem
,
dp
,
games
,
greedy
2100
x113
1427H
Prison Break
binary search
,
games
,
geometry
,
ternary search
3500
x45
1425A
Arena of Greed
games
,
greedy
1400
x4859
1419A
Digit Game
games
,
greedy
,
implementation
900
x17307
1411G
No Game No Life
bitmasks
,
games
,
math
,
matrices
2700
x436
1404B
Tree Tag
dfs and similar
,
dp
,
games
,
trees
1900
x5986
1402C
Star Trek
*special problem
,
combinatorics
,
dfs and similar
,
dp
,
games
,
graphs
,
matrices
,
trees
2600
x160
1398B
Substring Removal Game
games
,
greedy
,
sortings
800
x21961
1396B
Stoned Game
brute force
,
constructive algorithms
,
games
,
greedy
1800
x8910
1383B
GameGame
bitmasks
,
constructive algorithms
,
dp
,
games
,
greedy
,
math
1900
x4145
1382B
Sequential Nim
dp
,
games
1100
x20975
1375F
Integer Game
constructive algorithms
,
games
,
interactive
,
math
2600
x1597
1373B
01 Game
games
900
x25087
1372D
Omkar and Circle
brute force
,
dp
,
games
,
greedy
2100
x4727
1370C
Number Game
games
,
math
,
number theory
1400
x18680
1369F
BareLee
dfs and similar
,
dp
,
games
2700
x484
1368F
Lamps on a Circle
games
,
implementation
,
interactive
,
math
2600
x728
1365A
Matrix Game
games
,
greedy
,
implementation
1100
x21025
1363C
Game On Leaves
games
,
trees
1600
x14196
1346H
Game with Segments
*special problem
,
data structures
,
games
2700
x31
1333D
Challenges in school №41
brute force
,
constructive algorithms
,
games
,
graphs
,
greedy
,
implementation
,
sortings
2100
x3363
1312F
Attack on Red Kingdom
games
,
two pointers
2500
x552
1270A
Card Game
games
,
greedy
,
math
800
x15440
1221E
Game With String
games
2500
x901
1220C
Substring Game in the Lesson
games
,
greedy
,
strings
1300
x8790
1215D
Ticket Game
games
,
greedy
,
math
1700
x5340
1197F
Coloring Game
dp
,
games
,
matrices
2700
x178
1194D
1-2-K Game
games
,
math
1700
x5445
1190C
Tokitsukaze and Duel
brute force
,
games
,
greedy
2300
x1524
1190B
Tokitsukaze, CSL and Stone Game
games
1800
x5483
1155B
Game with Telephone Numbers
games
,
greedy
,
implementation
1200
x9841
1149E
Election Promises
games
,
graphs
3200
x270
1147F
Zigzag Game
games
,
interactive
3500
x155
1147C
Thanos Nim
games
2000
x2352
1110G
Tree-Tac-Toe
constructive algorithms
,
games
,
trees
3100
x406
1102C
Doors Breaking and Repairing
games
1200
x11262
1100D
Dasha and Chess
constructive algorithms
,
games
,
interactive
2500
x761
1099F
Cookies
binary search
,
data structures
,
dfs and similar
,
dp
,
games
,
trees
2400
x722
1091H
New Year and the Tricolore Recreation
games
3200
x282
1090G
Combostone
games
,
implementation
2500
x73
1076G
Array Game
data structures
,
games
3000
x289
1037G
A Game on Strings
games
3200
x203
1033G
Chip Game
games
3500
x184
1033C
Permutation Game
brute force
,
dp
,
games
1600
x4602
980C
Posterized
games
,
greedy
1700
x3499
959A
Mahmoud and Ehab and the even-odd game
games
,
math
800
x29750
936B
Sleepy Game
dfs and similar
,
dp
,
games
,
graphs
2100
x2677
934A
A Compatible Pair
brute force
,
games
1400
x6105
930D
Game with Tokens
data structures
,
games
,
implementation
2500
x346
919F
A Game With Numbers
games
,
graphs
,
shortest paths
2600
x254
917B
MADMAX
dfs and similar
,
dp
,
games
,
graphs
1700
x3068
914H
Ember and Storm's Tree Game
combinatorics
,
dp
,
games
,
trees
3400
x121
914B
Conan and Agasa play a Card Game
games
,
greedy
,
implementation
1200
x7625
896B
Ithea Plays With Chtholly
binary search
,
constructive algorithms
,
games
,
greedy
,
interactive
2000
x1781
859C
Pie Rules
dp
,
games
1500
x4402
850C
Arpa and a game with Mojtaba
bitmasks
,
dp
,
games
2200
x1052
841B
Godsend
games
,
math
1100
x10590
838C
Future Failure
dp
,
games
2800
x142
832A
Sasha and Sticks
games
,
math
800
x17331
819A
Mister B and Boring Game
games
,
greedy
2200
x256
812E
Sagheer and Apple Tree
games
,
trees
2300
x885
794E
Choosing Carrot
games
,
math
2800
x492
794C
Naming Company
games
,
greedy
,
sortings
1800
x2816
786A
Berzerk
dfs and similar
,
dp
,
games
2000
x1980
768E
Game of Stones
bitmasks
,
dp
,
games
2100
x2153
755B
PolandBall and Game
binary search
,
data structures
,
games
,
greedy
,
sortings
,
strings
1100
x8759
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