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Before contest
Codeforces Round 941 (Div. 1)
13:45:39
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Before contest
Codeforces Round 941 (Div. 2)
13:45:39
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→ Filter Problems
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combine-tags-by-or
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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
153E
Euclidean Distance
*special problem
2100
x72
100H
Battleship
*special problem
,
dfs and similar
,
implementation
2100
x74
207D6
The Beaver's Problem - 3
2100
x77
207D10
The Beaver's Problem - 3
2100
x79
530F
Jumping frogs
*special problem
2100
x97
207C1
Game with Two Trees
2100
x99
649E
Автобус
binary search
,
data structures
,
greedy
,
sortings
2100
x103
530H
Points in triangle
*special problem
,
geometry
2100
x119
345B
Triskaidekaphobia
*special problem
2100
x121
661D
Maximal Difference
*special problem
2100
x124
1431G
Number Deletion Game
*special problem
,
dp
,
games
,
greedy
2100
x137
530G
Levenshtein distance
*special problem
2100
x146
207D4
The Beaver's Problem - 3
2100
x146
1431F
Neural Network Problem
*special problem
,
binary search
,
greedy
2100
x152
1910E
Maximum Sum Subarrays
*special problem
,
dp
2100
x167
45H
Road Problem
graphs
2100
x174
774B
Significant Cups
*special problem
,
binary search
,
data structures
,
two pointers
2100
x216
178D3
Magic Squares
2100
x234
774A
Amusement Park
*special problem
,
ternary search
2100
x294
209B
Pixels
constructive algorithms
,
math
2100
x356
926J
Segments
data structures
2100
x372
852C
Property
greedy
,
sortings
2100
x374
228D
Zigzag
data structures
2100
x374
38F
Smart Boy
dp
,
games
,
strings
2100
x374
212C
Cowboys
combinatorics
,
dp
,
math
2100
x376
386D
Game with Points
dp
,
graphs
,
implementation
,
shortest paths
2100
x411
306C
White, Black and White Again
combinatorics
,
number theory
2100
x435
802D
Marmots (easy)
math
2100
x437
306B
Optimizer
data structures
,
greedy
,
sortings
2100
x437
132B
Piet
implementation
2100
x470
215C
Crosses
brute force
,
implementation
2100
x478
254E
Dormitory
dp
,
implementation
2100
x484
342D
Xenia and Dominoes
bitmasks
,
dfs and similar
,
dp
2100
x487
690D3
The Wall (hard)
dp
2100
x489
76B
Mice
greedy
,
two pointers
2100
x494
309B
Context Advertising
dp
,
two pointers
2100
x498
54D
Writing a Song
brute force
,
dp
,
strings
2100
x503
335C
More Reclamation
games
2100
x515
491B
New York Hotel
greedy
,
math
2100
x535
163C
Conveyor
sortings
,
two pointers
2100
x536
215E
Periodical Numbers
combinatorics
,
dp
,
number theory
2100
x538
60C
Mushroom Strife
brute force
,
dfs and similar
2100
x549
48E
Ivan the Fool VS Gorynych the Dragon
dp
,
games
,
graphs
2100
x560
39C
Moon Craters
dp
,
sortings
2100
x568
1218I
The Light Square
2-sat
,
dfs and similar
,
greedy
2100
x571
802K
Send the Fool Further! (medium)
dp
,
trees
2100
x577
50D
Bombing
binary search
,
dp
,
probabilities
2100
x596
132D
Constants in the language of Shakespeare
constructive algorithms
,
dp
,
greedy
2100
x603
370D
Broken Monitor
brute force
,
constructive algorithms
,
greedy
,
implementation
2100
x609
1906J
Count BFS Graph
combinatorics
,
dp
2100
x623
81D
Polycarp's Picture Gallery
constructive algorithms
,
greedy
2100
x629
1387A
Graph
*special problem
,
binary search
,
dfs and similar
,
dp
,
math
,
ternary search
2100
x670
838B
Diverging Directions
data structures
,
dfs and similar
,
trees
2100
x694
35E
Parade
data structures
,
sortings
2100
x700
522C
Chicken or Fish?
greedy
2100
x706
542F
Quest
dp
,
greedy
2100
x734
65C
Harry Potter and the Golden Snitch
binary search
,
geometry
2100
x772
475C
Kamal-ol-molk's Painting
brute force
,
constructive algorithms
,
greedy
2100
x777
225E
Unsolvable
math
,
number theory
2100
x777
852E
Casinos and travel
dp
2100
x808
106E
Space Rescuers
geometry
,
ternary search
2100
x836
859D
Third Month Insanity
dp
,
probabilities
,
trees
2100
x848
847F
Berland Elections
greedy
,
sortings
2100
x848
217B
Blackboard Fibonacci
brute force
,
math
2100
x853
457C
Elections
brute force
2100
x861
362D
Fools and Foolproof Roads
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
2100
x895
1184E2
Daleks' Invasion (medium)
dfs and similar
,
graphs
,
shortest paths
,
trees
2100
x898
1912B
Blueprint for Seating
combinatorics
,
divide and conquer
,
math
2100
x908
644C
Hostname Aliases
*special problem
,
binary search
,
data structures
,
implementation
,
sortings
,
strings
2100
x908
1906F
Maximize The Value
data structures
,
sortings
2100
x921
220C
Little Elephant and Shifts
data structures
2100
x921
1184A2
Heidi Learns Hashing (Medium)
brute force
,
number theory
2100
x928
336D
Vasily the Bear and Beautiful Strings
combinatorics
,
math
,
number theory
2100
x931
400E
Inna and Binary Logic
binary search
,
bitmasks
,
data structures
2100
x932
1725F
Field Photography
bitmasks
,
data structures
,
sortings
2100
x936
656D
Rosetta Problem
*special problem
2100
x938
524D
Social Network
greedy
,
two pointers
2100
x939
226D
The table
constructive algorithms
,
greedy
2100
x945
852D
Exploration plan
binary search
,
flows
,
graph matchings
,
shortest paths
2100
x946
74C
Chessboard Billiard
dfs and similar
,
dsu
,
graphs
,
number theory
2100
x947
615E
Hexagons
binary search
,
implementation
,
math
2100
x962
268E
Playlist
math
,
probabilities
,
sortings
2100
x972
954F
Runner's Problem
dp
,
matrices
,
sortings
2100
x975
77C
Beavermuncher-0xFF
dfs and similar
,
dp
,
dsu
,
greedy
,
trees
2100
x977
575F
Bulbo
dp
,
greedy
2100
x983
730C
Bulmart
binary search
,
dfs and similar
2100
x1004
1599H
Hidden Fortress
interactive
,
math
2100
x1007
238C
World Eater Brothers
dfs and similar
,
dp
,
greedy
,
trees
2100
x1018
900E
Maximum Questions
data structures
,
dp
,
strings
2100
x1027
630P
Area of a Star
geometry
2100
x1056
441D
Valera and Swaps
constructive algorithms
,
dsu
,
graphs
,
implementation
,
math
,
string suffix structures
2100
x1059
1146D
Frog Jumping
dfs and similar
,
math
,
number theory
2100
x1060
895D
String Mark
combinatorics
,
math
,
strings
2100
x1086
1938J
There and Back Again
2100
x1097
12E
Start of the session
constructive algorithms
2100
x1158
1070E
Getting Deals Done
binary search
,
data structures
2100
x1189
1044C
Optimal Polygon Perimeter
dp
,
geometry
2100
x1199
1163D
Mysterious Code
dp
,
strings
2100
x1210
1575L
Longest Array Deconstruction
data structures
,
divide and conquer
,
dp
,
sortings
2100
x1224
356C
Compartments
combinatorics
,
constructive algorithms
,
greedy
,
implementation
2100
x1229
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