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Before contest
Codeforces Round 941 (Div. 1)
31:32:22
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Before contest
Codeforces Round 941 (Div. 2)
31:32:23
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→ Filter Problems
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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
1427H
Prison Break
binary search
,
games
,
geometry
,
ternary search
3500
x69
1434E
A Convex Game
dsu
,
games
3500
x164
1919G
Tree LGM
constructive algorithms
,
divide and conquer
,
games
,
trees
3500
x167
1439E
Cheat and Win
bitmasks
,
data structures
,
games
,
trees
3500
x214
1147F
Zigzag Game
games
,
interactive
3500
x237
1033G
Chip Game
games
3500
x354
1442F
Differentiating Games
games
,
interactive
3400
x127
914H
Ember and Storm's Tree Game
combinatorics
,
dp
,
games
,
trees
3400
x226
457F
An easy problem about trees
dp
,
games
,
greedy
,
trees
3200
x103
1951H
Thanos Snap
binary search
,
dp
,
games
,
greedy
,
trees
3200
x172
1037G
A Game on Strings
games
3200
x295
494E
Sharti
data structures
,
games
3200
x302
1091H
New Year and the Tricolore Recreation
games
3200
x401
1149E
Election Promises
games
,
graphs
3200
x465
1610I
Mashtali vs AtCoder
games
,
trees
3100
x256
1784E
Infinite Game
brute force
,
combinatorics
,
dp
,
games
,
probabilities
3100
x298
1458E
Nim Shortcuts
data structures
,
games
3100
x404
1110G
Tree-Tac-Toe
constructive algorithms
,
games
,
trees
3100
x574
1659F
Tree and Permutation Game
dfs and similar
,
games
,
graphs
,
trees
3000
x178
1076G
Array Game
data structures
,
games
3000
x449
1906G
Grid Game 2
games
,
number theory
2900
x144
725F
Family Photos
games
,
greedy
2900
x481
536D
Tavas in Kansas
dp
,
games
2900
x708
838C
Future Failure
dp
,
games
2800
x276
794E
Choosing Carrot
games
,
math
2800
x659
1346H
Game with Segments
*special problem
,
data structures
,
games
2700
x45
1197F
Coloring Game
dp
,
games
,
matrices
2700
x237
98E
Help Shrek and Donkey
dp
,
games
,
math
,
probabilities
2700
x442
1411G
No Game No Life
bitmasks
,
games
,
math
,
matrices
2700
x578
1369F
BareLee
dfs and similar
,
dp
,
games
2700
x596
1817D
Toy Machine
constructive algorithms
,
games
,
implementation
2700
x664
1511G
Chips on a Board
bitmasks
,
brute force
,
data structures
,
dp
,
games
,
two pointers
2700
x698
1617E
Christmas Chocolates
dfs and similar
,
dp
,
games
,
graphs
,
implementation
,
math
,
number theory
,
shortest paths
,
trees
2700
x829
1451F
Nullify The Matrix
constructive algorithms
,
games
2700
x898
1402C
Star Trek
*special problem
,
combinatorics
,
dfs and similar
,
dp
,
games
,
graphs
,
matrices
,
trees
2600
x195
919F
A Game With Numbers
games
,
graphs
,
shortest paths
2600
x321
142D
Help Shrek and Donkey 2
games
2600
x337
273E
Dima and Game
dp
,
games
2600
x359
1368F
Lamps on a Circle
games
,
implementation
,
interactive
,
math
2600
x843
1536F
Omkar and Akmar
chinese remainder theorem
,
combinatorics
,
constructive algorithms
,
fft
,
games
,
geometry
,
math
,
meet-in-the-middle
,
string suffix structures
2600
x913
1704F
Colouring Game
constructive algorithms
,
dp
,
games
2600
x922
1375F
Integer Game
constructive algorithms
,
games
,
interactive
,
math
2600
x1928
1090G
Combostone
games
,
implementation
2500
x103
1585G
Poachers
dp
,
games
,
graphs
,
trees
2500
x169
930D
Game with Tokens
data structures
,
games
,
implementation
2500
x393
1773I
Interactive Factorial Guessing
brute force
,
games
,
implementation
,
interactive
2500
x453
138D
World of Darkraft
dp
,
games
2500
x469
1776I
Spinach Pizza
games
,
geometry
,
greedy
,
interactive
2500
x635
1312F
Attack on Red Kingdom
games
,
two pointers
2500
x660
1796E
Colored Subgraphs
dfs and similar
,
dp
,
games
,
greedy
,
trees
2500
x685
1776C
Library game
games
,
greedy
,
interactive
,
sortings
2500
x751
1100D
Dasha and Chess
constructive algorithms
,
games
,
interactive
2500
x830
1498F
Christmas Game
bitmasks
,
data structures
,
dfs and similar
,
dp
,
games
,
math
,
trees
2500
x842
1658E
Gojou and Matrix Game
data structures
,
dp
,
games
,
hashing
,
implementation
,
math
,
number theory
,
sortings
2500
x1001
1221E
Game With String
games
2500
x1015
1823E
Removing Graph
brute force
,
dp
,
games
,
graphs
,
math
2500
x1189
154D
Flatland Fencing
games
,
math
2400
x415
277C
Game
games
,
implementation
2400
x446
354B
Game with Strings
bitmasks
,
dp
,
games
2400
x448
1710E
Two Arrays
binary search
,
games
,
graph matchings
2400
x464
1099F
Cookies
binary search
,
data structures
,
dfs and similar
,
dp
,
games
,
trees
2400
x907
1934D2
XOR Break --- Game Version
bitmasks
,
games
,
greedy
,
interactive
2400
x1160
1615E
Purple Crayon
data structures
,
dfs and similar
,
games
,
graphs
,
greedy
,
math
,
sortings
,
trees
2400
x1394
1628D2
Game on Sum (Hard Version)
combinatorics
,
dp
,
games
,
math
2400
x1969
305E
Playing with String
games
2300
x596
167C
Wizards and Numbers
games
,
math
2300
x656
1866I
Imagination Castle
dp
,
games
,
two pointers
2300
x667
36D
New Game with a Chess Piece
games
2300
x674
317D
Game with Powers
dp
,
games
2300
x971
812E
Sagheer and Apple Tree
games
,
trees
2300
x1014
1584E
Game with Stones
binary search
,
data structures
,
games
,
greedy
2300
x1215
1942E
Farm Game
combinatorics
,
games
2300
x1394
1895E
Infinite Card Game
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
games
,
graphs
,
greedy
,
sortings
,
two pointers
2300
x1449
594A
Warrior and Archer
games
2300
x1693
1190C
Tokitsukaze and Duel
brute force
,
games
,
greedy
2300
x1783
819A
Mister B and Boring Game
games
,
greedy
2200
x292
255E
Furlo and Rublo and Game
games
,
implementation
,
math
2200
x830
377C
Captains Mode
bitmasks
,
dp
,
games
2200
x1102
850C
Arpa and a game with Mojtaba
bitmasks
,
dp
,
games
2200
x1368
731E
Funny Game
dp
,
games
2200
x1375
549C
The Game Of Parity
games
2200
x1715
603C
Lieges of Legendre
games
,
math
2200
x1807
1431G
Number Deletion Game
*special problem
,
dp
,
games
,
greedy
2100
x137
38F
Smart Boy
dp
,
games
,
strings
2100
x374
335C
More Reclamation
games
2100
x515
48E
Ivan the Fool VS Gorynych the Dragon
dp
,
games
,
graphs
2100
x560
282D
Yet Another Number Game
dp
,
games
2100
x1375
520D
Cubes
games
,
greedy
,
implementation
2100
x1532
1864E
Guess Game
bitmasks
,
data structures
,
games
,
math
,
probabilities
,
sortings
,
strings
,
trees
2100
x2459
768E
Game of Stones
bitmasks
,
dp
,
games
2100
x2627
1605D
Treelabeling
bitmasks
,
constructive algorithms
,
dfs and similar
,
games
,
greedy
,
implementation
,
trees
2100
x2832
1628D1
Game on Sum (Easy Version)
combinatorics
,
dp
,
games
,
math
2100
x3006
936B
Sleepy Game
dfs and similar
,
dp
,
games
,
graphs
2100
x3028
1333D
Challenges in school №41
brute force
,
constructive algorithms
,
games
,
graphs
,
greedy
,
implementation
,
sortings
2100
x3630
1372D
Omkar and Circle
brute force
,
dp
,
games
,
greedy
2100
x5285
63E
Sweets Game
bitmasks
,
dfs and similar
,
dp
,
games
,
implementation
2000
x713
39E
What Has Dirichlet Got to Do with That?
dp
,
games
2000
x852
87C
Interesting Game
dp
,
games
,
math
2000
x1301
78C
Beaver Game
dp
,
games
,
number theory
2000
x1798
896B
Ithea Plays With Chtholly
binary search
,
constructive algorithms
,
games
,
greedy
,
interactive
2000
x2047
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