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Codeforces Round 946 (Div. 3)
29:46:55
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Difficulty:
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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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#
Name
1621E
New School
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
sortings
2300
x1714
1550D
Excellent Arrays
binary search
,
combinatorics
,
constructive algorithms
,
implementation
,
math
,
sortings
,
two pointers
2300
x1784
1607F
Robot on the Board 2
brute force
,
dfs and similar
,
graphs
,
implementation
2300
x1891
85D
Sum of Medians
binary search
,
brute force
,
data structures
,
implementation
2300
x1911
1380E
Merging Towers
data structures
,
dsu
,
implementation
,
trees
2300
x1917
1625D
Binary Spiders
bitmasks
,
data structures
,
implementation
,
math
,
sortings
,
trees
2300
x1971
1834E
MEX of LCM
binary search
,
data structures
,
implementation
,
math
,
number theory
2300
x2073
1592D
Hemose in ICPC ?
binary search
,
dfs and similar
,
implementation
,
interactive
,
math
,
number theory
,
trees
2300
x2164
1385F
Removing Leaves
data structures
,
greedy
,
implementation
,
trees
2300
x2254
1396C
Monster Invaders
dp
,
greedy
,
implementation
2300
x2390
1628C
Grid Xor
constructive algorithms
,
greedy
,
implementation
,
interactive
,
math
2300
x3086
915E
Physical Education Lessons
data structures
,
implementation
,
sortings
2300
x4022
72B
INI-file
*special problem
,
implementation
2200
x75
98B
Help King
implementation
,
probabilities
,
trees
2200
x114
316F3
Suns and Rays
constructive algorithms
,
dfs and similar
,
implementation
2200
x163
316F1
Suns and Rays
dfs and similar
,
implementation
2200
x164
105C
Item World
brute force
,
implementation
,
sortings
2200
x270
257E
Greedy Elevator
data structures
,
implementation
2200
x275
182A
Battlefield
geometry
,
graphs
,
implementation
,
shortest paths
2200
x279
36C
Bowls
geometry
,
implementation
2200
x323
51D
Geometrical problem
implementation
2200
x418
858E
Tests Renumeration
greedy
,
implementation
2200
x497
243C
Colorado Potato Beetle
dfs and similar
,
implementation
2200
x520
253E
Printer
binary search
,
data structures
,
implementation
,
sortings
2200
x522
404E
Maze 1D
binary search
,
greedy
,
implementation
2200
x562
883A
Automatic Door
implementation
2200
x574
11C
How Many Squares?
implementation
2200
x590
71D
Solitaire
brute force
,
implementation
2200
x600
1575K
Knitting Batik
implementation
,
math
2200
x621
382D
Ksenia and Pawns
dfs and similar
,
graphs
,
implementation
,
trees
2200
x650
730D
Running Over The Bridges
greedy
,
implementation
,
math
2200
x680
730E
Award Ceremony
greedy
,
implementation
2200
x708
1773B
BinCoin
binary search
,
divide and conquer
,
hashing
,
implementation
,
probabilities
,
trees
2200
x736
366E
Dima and Magic Guitar
brute force
,
implementation
,
math
2200
x743
1912E
Evaluate It and Back Again
constructive algorithms
,
implementation
,
math
2200
x781
255E
Furlo and Rublo and Game
games
,
implementation
,
math
2200
x831
868D
Huge Strings
bitmasks
,
brute force
,
dp
,
implementation
,
strings
2200
x890
1425E
Excitation of Atoms
greedy
,
implementation
2200
x907
518E
Arthur and Questions
greedy
,
implementation
,
math
,
ternary search
2200
x907
754C
Vladik and chat
brute force
,
constructive algorithms
,
dp
,
implementation
,
strings
2200
x909
225D
Snake
bitmasks
,
dfs and similar
,
graphs
,
implementation
2200
x912
946E
Largest Beautiful Number
greedy
,
implementation
2200
x1075
286B
Shifting
implementation
2200
x1102
1666F
Fancy Stack
combinatorics
,
dp
,
implementation
2200
x1111
1921G
Mischievous Shooter
brute force
,
data structures
,
divide and conquer
,
dp
,
implementation
2200
x1132
639C
Bear and Polynomials
hashing
,
implementation
,
math
2200
x1188
1765H
Hospital Queue
binary search
,
graphs
,
greedy
,
implementation
2200
x1193
765E
Tree Folding
dfs and similar
,
dp
,
greedy
,
implementation
,
trees
2200
x1246
903E
Swapping Characters
brute force
,
hashing
,
implementation
,
strings
2200
x1258
1772G
Gaining Rating
binary search
,
greedy
,
implementation
,
math
,
sortings
,
two pointers
2200
x1274
461C
Appleman and a Sheet of Paper
data structures
,
implementation
2200
x1310
550E
Brackets in Implications
constructive algorithms
,
greedy
,
implementation
,
math
2200
x1376
1650F
Vitaly and Advanced Useless Algorithms
dp
,
greedy
,
implementation
2200
x1385
448E
Divisors
brute force
,
dfs and similar
,
implementation
,
number theory
2200
x1446
1926F
Vlad and Avoiding X
bitmasks
,
brute force
,
dfs and similar
,
dp
,
implementation
2200
x1505
1918E
ace5 and Task Order
constructive algorithms
,
divide and conquer
,
implementation
,
interactive
,
probabilities
,
sortings
2200
x1566
1789D
Serval and Shift-Shift-Shift
bitmasks
,
brute force
,
constructive algorithms
,
implementation
2200
x1579
1580C
Train Maintenance
brute force
,
data structures
,
implementation
2200
x1676
507D
The Maths Lecture
dp
,
implementation
2200
x1693
1907G
Lights
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
2200
x1761
1737D
Ela and the Wiring Wizard
brute force
,
dp
,
graphs
,
greedy
,
implementation
,
shortest paths
2200
x1813
1954E
Chain Reaction
binary search
,
data structures
,
dsu
,
greedy
,
implementation
,
math
,
number theory
2200
x1819
1149B
Three Religions
dp
,
implementation
,
strings
2200
x1868
1800G
Symmetree
dfs and similar
,
hashing
,
implementation
,
trees
2200
x1937
1208E
Let Them Slide
data structures
,
implementation
2200
x1960
1763D
Valid Bitonic Permutations
combinatorics
,
dp
,
implementation
,
math
,
number theory
2200
x1963
1179C
Serge and Dining Room
binary search
,
data structures
,
graph matchings
,
greedy
,
implementation
,
math
,
trees
2200
x1965
1181D
Irrigation
binary search
,
data structures
,
implementation
,
sortings
,
trees
,
two pointers
2200
x2033
1461E
Water Level
brute force
,
graphs
,
greedy
,
implementation
,
math
2200
x2061
1398E
Two Types of Spells
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
2200
x2180
1704E
Count Seconds
brute force
,
constructive algorithms
,
dp
,
graphs
,
implementation
,
math
2200
x2227
1627E
Not Escaping
data structures
,
dp
,
implementation
,
shortest paths
,
two pointers
2200
x2246
1498D
Bananas in a Microwave
dfs and similar
,
dp
,
graphs
,
implementation
2200
x2250
547A
Mike and Frog
brute force
,
greedy
,
implementation
,
math
2200
x2314
1736D
Equal Binary Subsequences
constructive algorithms
,
geometry
,
greedy
,
implementation
,
strings
2200
x2404
1384B2
Koa and the Beach (Hard Version)
constructive algorithms
,
dp
,
greedy
,
implementation
2200
x2460
1542D
Priority Queue
combinatorics
,
dp
,
implementation
,
math
,
ternary search
2200
x2533
707D
Persistent Bookcase
bitmasks
,
data structures
,
dfs and similar
,
implementation
2200
x2603
616E
Sum of Remainders
implementation
,
math
,
number theory
2200
x2704
1092D2
Great Vova Wall (Version 2)
data structures
,
implementation
2200
x2846
1305E
Kuroni and the Score Distribution
constructive algorithms
,
greedy
,
implementation
,
math
2200
x2918
1175E
Minimal Segment Cover
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
implementation
,
trees
2200
x3205
1437E
Make It Increasing
binary search
,
constructive algorithms
,
data structures
,
dp
,
implementation
2200
x3330
1520G
To Go Or Not To Go?
brute force
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
shortest paths
2200
x3512
280C
Game on Tree
implementation
,
math
,
probabilities
,
trees
2200
x3512
1333F
Kate and imperfection
greedy
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2200
x3975
1092D1
Great Vova Wall (Version 1)
greedy
,
implementation
,
math
2200
x4470
86D
Powerful array
data structures
,
implementation
,
math
,
two pointers
2200
x12584
100H
Battleship
*special problem
,
dfs and similar
,
implementation
2100
x74
386D
Game with Points
dp
,
graphs
,
implementation
,
shortest paths
2100
x413
132B
Piet
implementation
2100
x471
215C
Crosses
brute force
,
implementation
2100
x480
254E
Dormitory
dp
,
implementation
2100
x484
370D
Broken Monitor
brute force
,
constructive algorithms
,
greedy
,
implementation
2100
x613
644C
Hostname Aliases
*special problem
,
binary search
,
data structures
,
implementation
,
sortings
,
strings
2100
x908
615E
Hexagons
binary search
,
implementation
,
math
2100
x964
441D
Valera and Swaps
constructive algorithms
,
dsu
,
graphs
,
implementation
,
math
,
string suffix structures
2100
x1061
356C
Compartments
combinatorics
,
constructive algorithms
,
greedy
,
implementation
2100
x1229
286C
Main Sequence
greedy
,
implementation
2100
x1283
552E
Vanya and Brackets
brute force
,
dp
,
expression parsing
,
greedy
,
implementation
,
strings
2100
x1410
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