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Codeforces Round 941 (Div. 1)
01:47:30
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Codeforces Round 941 (Div. 2)
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implementation
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
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Name
1202F
You Are Given Some Letters...
binary search
,
implementation
,
math
2700
x368
852A
Digits
brute force
,
implementation
,
math
2500
x364
1416F
Showing Off
flows
,
graph matchings
,
greedy
,
implementation
3300
x363
44G
Shooting Gallery
data structures
,
implementation
2500
x361
1571C
Rhyme
*special problem
,
implementation
1800
x357
518F
Pasha and Pipe
binary search
,
brute force
,
combinatorics
,
dp
,
implementation
2300
x347
1578K
Kingdom of Islands
brute force
,
graphs
,
implementation
2800
x346
1393E2
Twilight and Ancient Scroll (harder version)
dp
,
hashing
,
implementation
,
string suffix structures
,
strings
,
two pointers
3200
x346
649D
Дефрагментация памяти
constructive algorithms
,
greedy
,
implementation
1600
x342
534E
Berland Local Positioning System
constructive algorithms
,
greedy
,
hashing
,
implementation
2400
x341
1952H
Palindrome
implementation
,
strings
x336
1168D
Anagram Paths
dp
,
implementation
,
trees
3000
x334
200E
Tractor College
implementation
,
math
,
number theory
,
ternary search
2400
x332
64C
Table
*special problem
,
greedy
,
implementation
,
math
1600
x331
1566G
Four Vertices
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
3100
x327
1494F
Delete The Edges
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
2900
x326
812D
Sagheer and Kindergarten
dfs and similar
,
graphs
,
implementation
,
trees
2700
x326
81E
Pairs
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
2700
x325
188G
Array Sorting
*special problem
,
implementation
1600
x324
212B
Polycarpus is Looking for Good Substrings
bitmasks
,
hashing
,
implementation
2300
x321
32E
Hide-and-Seek
geometry
,
implementation
2400
x321
1923F
Shrink-Reverse
binary search
,
brute force
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
2800
x320
1571D
Sweepstake
*special problem
,
brute force
,
constructive algorithms
,
implementation
,
math
1800
x317
1847E
Triangle Platinum?
brute force
,
combinatorics
,
implementation
,
interactive
,
math
,
probabilities
2900
x314
679D
Bear and Chase
brute force
,
dfs and similar
,
graphs
,
implementation
,
math
,
probabilities
2900
x311
77D
Domino Carpet
dp
,
implementation
2300
x309
117E
Tree or not Tree
data structures
,
divide and conquer
,
implementation
,
trees
2900
x307
1361D
Johnny and James
greedy
,
implementation
,
math
,
trees
2900
x306
1904F
Beautiful Tree
data structures
,
dfs and similar
,
graphs
,
implementation
,
trees
2800
x303
1949J
Amanda the Amoeba
graphs
,
implementation
,
trees
,
two pointers
x299
274E
Mirror Room
data structures
,
implementation
3000
x299
294D
Shaass and Painter Robot
brute force
,
implementation
,
number theory
2500
x298
1896G
Pepe Racing
constructive algorithms
,
implementation
,
interactive
,
sortings
3200
x296
991F
Concise and clear
brute force
,
greedy
,
implementation
,
math
2700
x294
332E
Binary Key
dp
,
greedy
,
implementation
2400
x294
36C
Bowls
geometry
,
implementation
2200
x294
135D
Cycle
brute force
,
dfs and similar
,
implementation
2500
x293
1505G
Encoded message
*special problem
,
implementation
2600
x291
1470E
Strange Permutation
binary search
,
combinatorics
,
data structures
,
dp
,
graphs
,
implementation
,
two pointers
3200
x291
188F
Binary Notation
*special problem
,
implementation
1400
x286
288E
Polo the Penguin and Lucky Numbers
dp
,
implementation
,
math
2800
x283
182A
Battlefield
geometry
,
graphs
,
implementation
,
shortest paths
2200
x278
257E
Greedy Elevator
data structures
,
implementation
2200
x275
830E
Perpetual Motion Machine
constructive algorithms
,
dp
,
graphs
,
implementation
,
math
,
trees
3100
x272
121D
Lucky Segments
binary search
,
implementation
,
two pointers
2500
x270
105C
Item World
brute force
,
implementation
,
sortings
2200
x269
1603F
October 18, 2017
combinatorics
,
dp
,
implementation
,
math
2700
x266
171H
A polyline
*special problem
,
implementation
1700
x265
1860F
Evaluate RBS
data structures
,
geometry
,
implementation
,
math
,
sortings
2900
x262
394D
Physical Education and Buns
brute force
,
implementation
,
math
x261
241F
Race
brute force
,
implementation
2300
x259
1884E
Hard Design
greedy
,
implementation
,
math
2800
x258
72H
Reverse It!
*special problem
,
implementation
1600
x258
1900F
Local Deletions
binary search
,
data structures
,
implementation
2800
x254
1864G
Magic Square
combinatorics
,
constructive algorithms
,
implementation
3100
x252
97A
Domino
brute force
,
implementation
2400
x250
62C
Inquisition
geometry
,
implementation
,
sortings
2300
x247
173D
Deputies
constructive algorithms
,
graphs
,
greedy
,
implementation
2500
x246
1239F
Swiper, no swiping!
graphs
,
implementation
3400
x245
1868D
Flower-like Pseudotree
constructive algorithms
,
graphs
,
greedy
,
implementation
,
trees
3000
x244
1109C
Sasha and a Patient Friend
binary search
,
data structures
,
implementation
2800
x244
238D
Tape Programming
data structures
,
implementation
2900
x244
188H
Stack
*special problem
,
expression parsing
,
implementation
1800
x244
40C
Berland Square
implementation
,
math
2300
x239
145D
Lucky Pair
combinatorics
,
data structures
,
implementation
2900
x237
1286F
Harry The Potter
brute force
,
constructive algorithms
,
dp
,
fft
,
implementation
,
math
3100
x233
97D
Robot in Basement
bitmasks
,
brute force
,
implementation
2700
x229
406E
Hamming Triples
implementation
,
math
,
two pointers
2800
x227
1083D
The Fair Nut's getting crazy
data structures
,
implementation
3500
x225
815E
Karen and Neighborhood
binary search
,
constructive algorithms
,
implementation
2900
x218
1098E
Fedya the Potter
binary search
,
implementation
,
math
,
number theory
3400
x211
1928F
Digital Patterns
combinatorics
,
data structures
,
implementation
,
math
2900
x206
403E
Two Rooted Trees
data structures
,
implementation
,
trees
2900
x201
280E
Sequence Transformation
brute force
,
data structures
,
dp
,
implementation
,
math
3000
x196
331D1
Escaping on Beaveractor
dfs and similar
,
implementation
2400
x194
1804G
Flow Control
data structures
,
dsu
,
implementation
3500
x193
363E
Two Circles
brute force
,
data structures
,
implementation
2500
x192
1765I
Infinite Chess
implementation
,
shortest paths
2800
x181
374E
Inna and Babies
binary search
,
data structures
,
dsu
,
geometry
,
implementation
2600
x178
1940B
Three Arrays
*special problem
,
constructive algorithms
,
implementation
,
sortings
x171
331D3
Escaping on Beaveractor
data structures
,
implementation
,
trees
3000
x168
251E
Tree and Table
dfs and similar
,
dp
,
implementation
,
trees
3000
x168
316F1
Suns and Rays
dfs and similar
,
implementation
2200
x164
316F3
Suns and Rays
constructive algorithms
,
dfs and similar
,
implementation
2200
x163
1450H2
Multithreading (Hard Version)
combinatorics
,
implementation
,
math
3300
x162
331E1
Deja Vu
constructive algorithms
,
graphs
,
implementation
2900
x162
1696H
Maximum Product?
brute force
,
combinatorics
,
dp
,
greedy
,
implementation
,
math
,
two pointers
3500
x153
1012F
Passports
dp
,
implementation
3400
x152
1361F
Johnny and New Toy
data structures
,
implementation
,
math
3300
x145
1208H
Red Blue Tree
data structures
,
implementation
,
trees
3500
x141
1835F
Good Graph
bitmasks
,
dfs and similar
,
graph matchings
,
graphs
,
implementation
3500
x137
105D
Entertaining Geodetics
brute force
,
dsu
,
implementation
2700
x135
1503F
Balance the Cards
constructive algorithms
,
data structures
,
divide and conquer
,
geometry
,
graphs
,
implementation
3500
x133
100F
Polynom
*special problem
,
implementation
1800
x132
472E
Design Tutorial: Learn from a Game
constructive algorithms
,
implementation
2800
x128
39G
Inverse Function
implementation
2400
x123
1156G
Optimizer
graphs
,
greedy
,
hashing
,
implementation
2700
x120
1089J
JS Minification
greedy
,
implementation
3200
x120
1211F
kotlinkotlinkotlinkotlin...
*special problem
,
graphs
,
implementation
,
strings
2300
x118
780H
Intranet of Buses
binary search
,
geometry
,
implementation
,
two pointers
3100
x116
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