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Codeforces Round 943 (Div. 3)
18:20:29
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Difficulty:
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math
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
249D
Donkey and Stars
data structures
,
dp
,
geometry
,
math
,
sortings
2700
x374
1210E
Wojtek and Card Tricks
math
2700
x389
1543E
The Final Pursuit
bitmasks
,
constructive algorithms
,
divide and conquer
,
graphs
,
greedy
,
math
2700
x393
1120B
Once in a casino
constructive algorithms
,
greedy
,
implementation
,
math
2700
x405
1728G
Illumination
binary search
,
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
two pointers
2700
x410
1918G
Permutation of Given
constructive algorithms
,
math
2700
x418
388D
Fox and Perfect Sets
math
2700
x435
251D
Two Sets
bitmasks
,
math
2700
x441
98E
Help Shrek and Donkey
dp
,
games
,
math
,
probabilities
2700
x442
1510I
Is It Rated?
greedy
,
interactive
,
math
,
probabilities
2700
x447
833C
Ever-Hungry Krakozyabra
brute force
,
combinatorics
,
greedy
,
math
2700
x460
623D
Birthday
greedy
,
math
,
probabilities
2700
x466
1916H2
Matrix Rank (Hard Version)
combinatorics
,
dp
,
math
,
matrices
,
string suffix structures
2700
x500
1715F
Crop Squares
constructive algorithms
,
geometry
,
interactive
,
math
2700
x501
1510J
Japanese Game
constructive algorithms
,
math
2700
x506
1942F
Farmer John's Favorite Function
brute force
,
data structures
,
implementation
,
math
2700
x544
1801F
Another n-dimensional chocolate bar
dp
,
math
,
meet-in-the-middle
,
number theory
2700
x544
1682E
Unordered Swaps
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
math
,
sortings
,
trees
2700
x559
1487G
String Counting
combinatorics
,
dp
,
fft
,
math
2700
x573
1411G
No Game No Life
bitmasks
,
games
,
math
,
matrices
2700
x578
643E
Bear and Destroying Subtrees
dp
,
math
,
probabilities
,
trees
2700
x579
1916H1
Matrix Rank (Easy Version)
brute force
,
combinatorics
,
dp
,
math
,
matrices
2700
x582
1540C1
Converging Array (Easy Version)
dp
,
math
2700
x593
1956E2
Nene vs. Monsters (Hard Version)
brute force
,
greedy
,
implementation
,
math
2700
x616
1336E1
Chiori and Doll Picking (easy version)
bitmasks
,
brute force
,
combinatorics
,
math
2700
x647
113D
Museum
math
,
matrices
,
probabilities
2700
x649
1658F
Juju and Binary String
brute force
,
constructive algorithms
,
greedy
,
math
2700
x724
1781F
Bracket Insertion
combinatorics
,
dp
,
math
,
trees
2700
x729
1720E
Misha and Paintings
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
2700
x735
241B
Friends
binary search
,
bitmasks
,
data structures
,
math
2700
x749
1924D
Balanced Subsequences
combinatorics
,
dp
,
math
2700
x755
575A
Fibonotci
data structures
,
math
,
matrices
2700
x756
1292D
Chaotic V.
dp
,
graphs
,
greedy
,
math
,
number theory
,
trees
2700
x772
1103C
Johnny Solving
constructive algorithms
,
dfs and similar
,
graphs
,
math
2700
x777
827E
Rusty String
fft
,
math
,
strings
2700
x788
1338D
Nested Rubber Bands
constructive algorithms
,
dfs and similar
,
dp
,
math
,
trees
2700
x799
1542E2
Abnormal Permutation Pairs (hard version)
combinatorics
,
dp
,
fft
,
math
2700
x804
1887D
Split
binary search
,
data structures
,
divide and conquer
,
dsu
,
math
,
trees
,
two pointers
2700
x807
838D
Airplane Arrangements
math
,
number theory
2700
x811
1617E
Christmas Chocolates
dfs and similar
,
dp
,
games
,
graphs
,
implementation
,
math
,
number theory
,
shortest paths
,
trees
2700
x831
1750F
Majority
combinatorics
,
dp
,
math
,
strings
2700
x858
839E
Mother of Dragons
brute force
,
graphs
,
math
,
meet-in-the-middle
2700
x883
1473F
Strange Set
flows
,
math
2700
x903
1515G
Phoenix and Odometers
dfs and similar
,
graphs
,
math
,
number theory
2700
x933
1344D
Résumé Review
binary search
,
greedy
,
math
2700
x946
1422F
Boring Queries
data structures
,
math
,
number theory
2700
x969
1553G
Common Divisor Graph
brute force
,
constructive algorithms
,
dsu
,
graphs
,
hashing
,
math
,
number theory
2700
x971
1641D
Two Arrays
bitmasks
,
brute force
,
combinatorics
,
greedy
,
hashing
,
math
,
two pointers
2700
x1043
1733E
Conveyor
constructive algorithms
,
dp
,
math
2700
x1089
995F
Cowmpany Cowmpensation
combinatorics
,
dp
,
math
,
trees
2700
x1121
1458C
Latin Square
math
,
matrices
2700
x1198
961G
Partitions
combinatorics
,
math
,
number theory
2700
x1286
1856E2
PermuTree (hard version)
bitmasks
,
dfs and similar
,
dp
,
fft
,
greedy
,
implementation
,
math
,
trees
2700
x1303
1634F
Fibonacci Additions
brute force
,
data structures
,
hashing
,
implementation
,
math
2700
x1525
906D
Power Tower
chinese remainder theorem
,
math
,
number theory
2700
x1966
1270G
Subset with Zero Sum
constructive algorithms
,
dfs and similar
,
graphs
,
math
2700
x2032
40D
Interesting Sequence
math
2600
x124
303D
Rotatable Number
math
,
number theory
2600
x278
249E
Endless Matrix
math
2600
x287
1027G
X-mouse in the Campus
bitmasks
,
math
,
number theory
2600
x294
60E
Mushroom Gnomes
math
,
matrices
2600
x316
23D
Tetragon
geometry
,
math
2600
x325
843C
Upgrading Tree
constructive algorithms
,
dfs and similar
,
graphs
,
math
,
trees
2600
x346
185D
Visit of the Great
math
,
number theory
2600
x378
1063D
Candies for Children
brute force
,
math
2600
x418
93E
Lostborn
dp
,
math
,
number theory
2600
x433
229E
Gifts
combinatorics
,
dp
,
math
,
probabilities
2600
x450
1945H
GCD is Greater
brute force
,
data structures
,
math
,
number theory
2600
x469
1651E
Sum of Matchings
brute force
,
combinatorics
,
constructive algorithms
,
dfs and similar
,
graph matchings
,
greedy
,
math
2600
x493
1679F
Formalism for Formalism
bitmasks
,
dp
,
math
2600
x495
542D
Superhero's Job
dfs and similar
,
dp
,
hashing
,
math
,
number theory
2600
x495
698D
Limak and Shooting Points
brute force
,
geometry
,
math
2600
x503
963C
Cutting Rectangle
brute force
,
math
,
number theory
2600
x559
248E
Piglet's Birthday
dp
,
math
,
probabilities
2600
x559
1257G
Divisor Set
divide and conquer
,
fft
,
greedy
,
math
,
number theory
2600
x574
484C
Strange Sorting
implementation
,
math
2600
x580
1778F
Maximizing Root
dfs and similar
,
dp
,
graphs
,
math
,
number theory
,
trees
2600
x596
1762E
Tree Sum
combinatorics
,
math
,
trees
2600
x600
1895F
Fancy Arrays
combinatorics
,
dp
,
math
,
matrices
2600
x623
1430G
Yet Another DAG Problem
bitmasks
,
dfs and similar
,
dp
,
flows
,
graphs
,
math
2600
x623
1896F
Bracket Xoring
constructive algorithms
,
greedy
,
implementation
,
math
2600
x647
311D
Interval Cubing
data structures
,
math
2600
x659
1158D
Winding polygonal line
constructive algorithms
,
geometry
,
greedy
,
math
2600
x663
1799G
Count Voting
combinatorics
,
dp
,
math
2600
x696
1821F
Timber
combinatorics
,
dp
,
fft
,
math
2600
x702
763C
Timofey and remoduling
brute force
,
implementation
,
math
,
number theory
2600
x703
1844F1
Min Cost Permutation (Easy Version)
brute force
,
constructive algorithms
,
greedy
,
math
2600
x736
1848E
Vika and Stone Skipping
brute force
,
implementation
,
math
,
number theory
2600
x740
235E
Number Challenge
combinatorics
,
dp
,
implementation
,
math
,
number theory
2600
x741
1530F
Bingo
bitmasks
,
combinatorics
,
dp
,
math
,
probabilities
2600
x750
1153F
Serval and Bonus Problem
combinatorics
,
dp
,
math
,
probabilities
2600
x752
1740F
Conditional Mix
combinatorics
,
dp
,
math
2600
x758
1398G
Running Competition
bitmasks
,
fft
,
math
,
number theory
2600
x764
1380G
Circular Dungeon
greedy
,
math
,
probabilities
2600
x764
1919E
Counting Prefixes
combinatorics
,
constructive algorithms
,
dp
,
implementation
,
math
2600
x769
1823F
Random Walk
dp
,
graphs
,
math
,
probabilities
,
trees
2600
x770
535E
Tavas and Pashmaks
geometry
,
math
2600
x797
1805F1
Survival of the Weakest (easy version)
binary search
,
brute force
,
implementation
,
math
,
sortings
2600
x809
1368F
Lamps on a Circle
games
,
implementation
,
interactive
,
math
2600
x844
1466G
Song of the Sirens
combinatorics
,
divide and conquer
,
hashing
,
math
,
string suffix structures
,
strings
2600
x848
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