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Before contest
Codeforces Round #793 (Div. 2)
06:29:42
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Difficulty:
—
fft
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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Status
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Custom test
Problems
#
Name
1119E
Pavel and Triangles
brute force
,
dp
,
fft
,
greedy
,
ternary search
1900
x3951
1438C
Engineer Artem
2-sat
,
chinese remainder theorem
,
constructive algorithms
,
fft
,
flows
2000
x8356
1559E
Mocha and Stars
combinatorics
,
dp
,
fft
,
math
,
number theory
2200
x1825
954I
Yet Another String Matching Problem
fft
,
math
2200
x724
1342E
Placing Rooks
combinatorics
,
fft
,
math
2300
x2145
993E
Nikita and Order Statistics
chinese remainder theorem
,
fft
,
math
2300
x1087
300D
Painting Square
dp
,
fft
2300
x632
632E
Thief in a Shop
divide and conquer
,
dp
,
fft
,
math
2400
x1704
1036E
Covered Points
fft
,
geometry
,
number theory
2400
x1212
1096G
Lucky Tickets
divide and conquer
,
dp
,
fft
2400
x1050
1608D
Dominoes
combinatorics
,
fft
,
graphs
,
math
,
number theory
2400
x1032
1542E1
Abnormal Permutation Pairs (easy version)
combinatorics
,
dp
,
fft
,
math
2400
x887
1218D
Xor Spanning Tree
divide and conquer
,
fft
,
graphs
2400
x238
528D
Fuzzy Search
bitmasks
,
brute force
,
fft
2500
x1634
1548C
The Three Little Pigs
combinatorics
,
dp
,
fft
,
math
2500
x1390
1251F
Red-White Fence
combinatorics
,
fft
2500
x603
1218E
Product Tuples
divide and conquer
,
fft
2500
x274
662C
Binary Table
bitmasks
,
brute force
,
divide and conquer
,
dp
,
fft
,
math
2600
x1447
1536F
Omkar and Akmar
chinese remainder theorem
,
combinatorics
,
constructive algorithms
,
fft
,
games
,
geometry
,
math
,
meet-in-the-middle
,
string suffix structures
2600
x724
914G
Sum the Fibonacci
bitmasks
,
divide and conquer
,
dp
,
fft
,
math
2600
x676
1398G
Running Competition
bitmasks
,
fft
,
math
,
number theory
2600
x567
958F3
Lightsabers (hard)
fft
2600
x467
1257G
Divisor Set
divide and conquer
,
fft
,
greedy
,
math
,
number theory
2600
x451
1613F
Tree Coloring
combinatorics
,
divide and conquer
,
fft
2600
x448
754E
Dasha and cyclic table
bitmasks
,
brute force
,
fft
,
strings
,
trees
2600
x389
827E
Rusty String
fft
,
math
,
strings
2700
x633
1408G
Clusterization Counting
combinatorics
,
dp
,
dsu
,
fft
,
graphs
,
trees
2700
x594
1542E2
Abnormal Permutation Pairs (hard version)
combinatorics
,
dp
,
fft
,
math
2700
x541
1487G
String Counting
combinatorics
,
dp
,
fft
,
math
2700
x468
1574F
Occurrences
combinatorics
,
dfs and similar
,
dp
,
dsu
,
fft
,
graphs
2700
x418
1671F
Permutation Counting
brute force
,
combinatorics
,
dp
,
fft
,
math
2700
x171
286E
Ladies' Shop
constructive algorithms
,
fft
,
math
2800
x683
850E
Random Elections
bitmasks
,
brute force
,
divide and conquer
,
fft
,
math
2800
x301
1033F
Boolean Computer
bitmasks
,
brute force
,
fft
,
math
2800
x294
472G
Design Tutorial: Increase the Constraints
bitmasks
,
data structures
,
fft
2800
x290
1473G
Tiles
combinatorics
,
dp
,
fft
,
math
2800
x284
960G
Bandit Blues
combinatorics
,
dp
,
fft
,
math
2900
x765
1334G
Substring Search
bitmasks
,
brute force
,
fft
2900
x282
1450H1
Multithreading (Easy Version)
combinatorics
,
fft
,
math
2900
x261
1644F
Basis
combinatorics
,
fft
,
math
,
number theory
2900
x221
1667E
Centroid Probabilities
combinatorics
,
dp
,
fft
,
math
3000
x269
1575C
Cyclic Sum
data structures
,
fft
,
number theory
3000
x101
438E
The Child and Binary Tree
combinatorics
,
divide and conquer
,
fft
,
number theory
3100
x1311
923E
Perpetual Subtraction
fft
,
math
,
matrices
3100
x305
986D
Perfect Encoding
fft
,
math
3100
x266
1349F1
Slime and Sequences (Easy Version)
dp
,
fft
,
math
3100
x256
1439D
INOI Final Contests
combinatorics
,
dp
,
fft
3100
x223
981H
K Paths
combinatorics
,
data structures
,
dp
,
fft
,
math
3100
x200
1286F
Harry The Potter
brute force
,
constructive algorithms
,
dp
,
fft
,
implementation
,
math
3100
x159
1184A3
Heidi Learns Hashing (Hard)
fft
,
math
,
number theory
3100
x91
1488J
Flower Shop
*special problem
,
data structures
,
fft
,
math
3100
x20
755G
PolandBall and Many Other Balls
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3200
x548
553E
Kyoya and Train
dp
,
fft
,
graphs
,
math
,
probabilities
3200
x423
1119H
Triple
fft
,
math
3200
x277
623E
Transforming Sequence
combinatorics
,
dp
,
fft
,
math
3300
x391
1528F
AmShZ Farm
combinatorics
,
fft
,
math
3300
x155
1641E
Special Positions
combinatorics
,
divide and conquer
,
fft
,
math
3300
x141
1392I
Kevin and Grid
fft
,
graphs
,
math
3300
x112
1580F
Problems for Codeforces
combinatorics
,
fft
,
math
3300
x66
901E
Cyclic Cipher
fft
,
math
3300
x60
715E
Complete the Permutations
combinatorics
,
fft
,
graphs
,
math
3400
x249
848E
Days of Floral Colours
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
3400
x168
1103E
Radix sum
fft
,
math
,
number theory
3400
x162
1010F
Tree
fft
,
graphs
,
trees
3400
x158
773F
Test Data Generation
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x134
1553I
Stairs
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
3400
x118
1270I
Xor on Figures
constructive algorithms
,
fft
,
math
3500
x154
1054H
Epic Convolution
chinese remainder theorem
,
fft
,
math
,
number theory
3500
x132
1479E
School Clubs
dp
,
fft
,
math
,
number theory
,
probabilities
3500
x92
1477F
Nezzar and Chocolate Bars
combinatorics
,
fft
,
math
,
probabilities
3500
x85
1349F2
Slime and Sequences (Hard Version)
dp
,
fft
,
math
3500
x75
1654H
Three Minimums
combinatorics
,
constructive algorithms
,
divide and conquer
,
dp
,
fft
,
math
3500
x38
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