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Before contest
Codeforces Round #956 (Div. 2) and ByteRace 2024
42:58:07
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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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Custom test
Problems
#
Name
280A
Rectangle Puzzle
geometry
2000
x1452
279E
Beautiful Decomposition
dp
,
games
,
greedy
,
number theory
1900
x1419
279D
The Minimum Number of Variables
bitmasks
,
dp
2200
x716
279C
Ladder
dp
,
implementation
,
two pointers
1700
x8126
279B
Books
binary search
,
brute force
,
implementation
,
two pointers
1400
x49653
279A
Point on Spiral
brute force
,
geometry
,
implementation
1400
x5540
278B
New Problem
brute force
,
strings
1500
x3427
277E
Binary Tree on Plane
flows
,
trees
2400
x1248
277D
Google Code Jam
dp
,
probabilities
2800
x331
277C
Game
games
,
implementation
2400
x448
277B
Set of Points
constructive algorithms
,
geometry
2300
x787
277A
Learning Languages
dfs and similar
,
dsu
1400
x18343
276E
Little Girl and Problem on Trees
data structures
,
graphs
,
trees
2100
x1569
276D
Little Girl and Maximum XOR
bitmasks
,
dp
,
greedy
,
implementation
,
math
1700
x13325
276C
Little Girl and Maximum Sum
data structures
,
greedy
,
implementation
,
sortings
1500
x24928
275B
Convex Shape
constructive algorithms
,
implementation
1700
x2795
274E
Mirror Room
data structures
,
implementation
3000
x306
274D
Lovely Matrix
dfs and similar
,
graphs
,
greedy
,
sortings
2200
x1014
274C
The Last Hole!
brute force
,
geometry
2600
x348
274B
Zero Tree
dfs and similar
,
dp
,
greedy
,
trees
1800
x4930
274A
k-Multiple Free Set
binary search
,
greedy
,
sortings
1500
x9931
273E
Dima and Game
dp
,
games
2600
x363
273D
Dima and Figure
dp
2400
x388
272E
Dima and Horses
combinatorics
,
constructive algorithms
,
graphs
2200
x1178
272D
Dima and Two Sequences
combinatorics
,
math
,
sortings
1600
x2597
272C
Dima and Staircase
data structures
,
implementation
1500
x6712
272B
Dima and Sequence
implementation
,
math
1400
x3947
271E
Three Horses
constructive algorithms
,
math
,
number theory
2200
x480
271D
Good Substrings
data structures
,
strings
1800
x10675
271C
Secret
constructive algorithms
,
implementation
1500
x2919
270B
Multithreading
data structures
,
greedy
,
implementation
1400
x4094
269E
String Theory
geometry
,
math
,
strings
3100
x108
269D
Maximum Waterfall
data structures
,
dp
,
graphs
,
sortings
2600
x433
269C
Flawed Flow
constructive algorithms
,
flows
,
graphs
,
greedy
2100
x1626
269B
Greenhouse Effect
dp
1700
x6200
269A
Magical Boxes
greedy
,
math
1600
x3493
268E
Playlist
math
,
probabilities
,
sortings
2100
x981
268D
Wall Bars
dp
2300
x502
268C
Beautiful Sets of Points
constructive algorithms
,
implementation
1500
x13430
267C
Berland Traffic
math
,
matrices
2700
x160
267B
Dominoes
dfs and similar
,
graphs
2000
x617
266E
More Queries to Array...
data structures
,
math
2500
x770
266D
BerDonalds
graphs
,
math
,
shortest paths
2400
x758
266C
Below the Diagonal
constructive algorithms
,
greedy
,
math
2100
x1339
264E
Roadside Trees
data structures
,
dp
3000
x398
264D
Colorful Stones
dp
,
two pointers
2500
x408
264C
Choosing Balls
dp
2000
x2800
264B
Good Sequences
dp
,
number theory
1500
x9851
263E
Rhombus
brute force
,
data structures
,
dp
2500
x397
263D
Cycle in Graph
dfs and similar
,
graphs
1800
x3371
263C
Circle of Numbers
brute force
,
dfs and similar
,
implementation
2000
x1062
261E
Maxim and Calculator
brute force
,
dp
,
two pointers
2800
x406
261D
Maxim and Increasing Subsequence
dp
2600
x554
261C
Maxim and Matrix
constructive algorithms
,
dp
,
math
2000
x765
261B
Maxim and Restaurant
dp
,
math
,
probabilities
1900
x1374
261A
Maxim and Discounts
greedy
,
sortings
1400
x5118
260E
Dividing Kingdom
binary search
,
brute force
,
data structures
2500
x453
260D
Black and White Tree
constructive algorithms
,
dsu
,
graphs
,
greedy
,
trees
2100
x1375
260C
Balls and Boxes
constructive algorithms
,
greedy
,
implementation
1700
x2939
260B
Ancient Prophesy
brute force
,
implementation
,
strings
1600
x3759
260A
Adding Digits
implementation
,
math
1400
x14311
258E
Little Elephant and Tree
data structures
,
dfs and similar
,
trees
2400
x1043
258D
Little Elephant and Broken Sorting
dp
,
math
,
probabilities
2600
x1223
258C
Little Elephant and LCM
binary search
,
combinatorics
,
dp
,
math
2000
x1766
258B
Little Elephant and Elections
brute force
,
combinatorics
,
dp
1900
x1427
257E
Greedy Elevator
data structures
,
implementation
2200
x277
257D
Sum
greedy
,
math
1900
x1559
257C
View Angle
brute force
,
geometry
,
math
1800
x4235
256E
Lucky Arrays
data structures
2400
x656
256D
Liars and Serge
dp
2700
x256
255E
Furlo and Rublo and Game
games
,
implementation
,
math
2200
x836
255D
Mr. Bender and Square
binary search
,
implementation
,
math
1800
x1935
255C
Almost Arithmetical Progression
brute force
,
dp
1500
x4657
254E
Dormitory
dp
,
implementation
2100
x657
254D
Rats
brute force
,
dfs and similar
,
graphs
,
implementation
,
shortest paths
2300
x506
254C
Anagram
greedy
,
strings
1800
x1476
254B
Jury Size
brute force
,
implementation
1500
x2136
253E
Printer
binary search
,
data structures
,
implementation
,
sortings
2200
x523
253D
Table with Letters - 2
brute force
,
two pointers
2000
x822
253C
Text Editor
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x2551
253B
Physics Practical
binary search
,
dp
,
sortings
,
two pointers
1400
x10440
252B
Unsorting Array
brute force
,
sortings
1800
x1699
251E
Tree and Table
dfs and similar
,
dp
,
implementation
,
trees
3000
x169
251D
Two Sets
bitmasks
,
math
2700
x444
251C
Number Transformation
dp
,
greedy
,
number theory
2000
x1013
251B
Playing with Permutations
implementation
,
math
1800
x1257
250E
Mad Joe
brute force
2000
x441
250D
Building Bridge
geometry
,
ternary search
,
two pointers
1900
x882
250C
Movie Critics
greedy
1600
x1895
250B
Restoring IPv6
implementation
,
strings
1500
x1959
249E
Endless Matrix
math
2600
x290
249D
Donkey and Stars
data structures
,
dp
,
geometry
,
math
,
sortings
2700
x399
248E
Piglet's Birthday
dp
,
math
,
probabilities
2600
x570
248D
Sweets for Everyone!
binary search
,
greedy
,
implementation
2300
x487
248C
Robo-Footballer
binary search
,
geometry
2000
x802
248B
Chilly Willy
math
,
number theory
1400
x5226
246E
Blood Cousins Return
binary search
,
data structures
,
dfs and similar
,
dp
,
sortings
2400
x3039
246D
Colorful Graph
brute force
,
dfs and similar
,
graphs
1600
x9283
246C
Beauty Pageant
brute force
,
constructive algorithms
,
greedy
1600
x2612
245H
Queries for Number of Palindromes
dp
,
hashing
,
strings
1800
x6219
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