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Codeforces Round 1002 (Div. 2)
2 days
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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
276C
Little Girl and Maximum Sum
data structures
,
greedy
,
implementation
,
sortings
1500
x28863
276B
Little Girl and Game
games
,
greedy
1300
x29281
276A
Lunch Rush
implementation
900
x28113
275B
Convex Shape
constructive algorithms
,
implementation
1700
x2847
275A
Lights Out
implementation
900
x31100
274E
Mirror Room
data structures
,
implementation
3000
x317
274D
Lovely Matrix
dfs and similar
,
graphs
,
greedy
,
sortings
2200
x1051
274C
The Last Hole!
brute force
,
geometry
2600
x351
274B
Zero Tree
dfs and similar
,
dp
,
greedy
,
trees
1800
x5092
274A
k-Multiple Free Set
binary search
,
greedy
,
sortings
1500
x10158
273E
Dima and Game
dp
,
games
2600
x370
273D
Dima and Figure
dp
2400
x426
272E
Dima and Horses
combinatorics
,
constructive algorithms
,
graphs
2200
x1234
272D
Dima and Two Sequences
combinatorics
,
math
,
sortings
1600
x2648
272C
Dima and Staircase
data structures
,
implementation
1500
x6849
272B
Dima and Sequence
implementation
,
math
1400
x4063
272A
Dima and Friends
implementation
,
math
1000
x25223
271E
Three Horses
constructive algorithms
,
math
,
number theory
2200
x518
271D
Good Substrings
data structures
,
strings
1800
x11760
271C
Secret
constructive algorithms
,
implementation
1500
x3013
271B
Prime Matrix
binary search
,
brute force
,
math
,
number theory
1300
x13436
271A
Beautiful Year
brute force
800
x146958
270B
Multithreading
data structures
,
greedy
,
implementation
1400
x4208
270A
Fancy Fence
geometry
,
implementation
,
math
1100
x46515
269E
String Theory
geometry
,
math
,
strings
3100
x109
269D
Maximum Waterfall
data structures
,
dp
,
graphs
,
sortings
2600
x466
269C
Flawed Flow
constructive algorithms
,
flows
,
graphs
,
greedy
2100
x1698
269B
Greenhouse Effect
dp
1700
x6412
269A
Magical Boxes
greedy
,
math
1600
x3559
268E
Playlist
math
,
probabilities
,
sortings
2100
x1033
268D
Wall Bars
dp
2300
x513
268C
Beautiful Sets of Points
constructive algorithms
,
implementation
1500
x13859
268B
Buttons
implementation
,
math
1000
x33246
268A
Games
brute force
800
x90018
267C
Berland Traffic
math
,
matrices
2700
x167
267B
Dominoes
dfs and similar
,
graphs
2000
x655
267A
Subtractions
math
,
number theory
900
x7830
266E
More Queries to Array...
data structures
,
math
2500
x941
266D
BerDonalds
graphs
,
math
,
shortest paths
2400
x906
266C
Below the Diagonal
constructive algorithms
,
greedy
,
math
2100
x1365
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x141754
266A
Stones on the Table
implementation
800
x201378
265B
Roadside Trees (Simplified Edition)
greedy
,
implementation
1000
x17363
265A
Colorful Stones (Simplified Edition)
implementation
800
x37848
264E
Roadside Trees
data structures
,
dp
3000
x438
264D
Colorful Stones
dp
,
two pointers
2500
x425
264C
Choosing Balls
dp
2000
x2998
264B
Good Sequences
dp
,
number theory
1500
x10660
264A
Escape from Stones
constructive algorithms
,
data structures
,
implementation
,
two pointers
1200
x11000
263E
Rhombus
brute force
,
data structures
,
dp
2500
x412
263D
Cycle in Graph
dfs and similar
,
graphs
1800
x3684
263C
Circle of Numbers
brute force
,
dfs and similar
,
implementation
2000
x1083
263B
Squares
greedy
,
implementation
,
sortings
900
x9078
263A
Beautiful Matrix
implementation
800
x258717
262B
Roma and Changing Signs
greedy
1200
x11551
262A
Roma and Lucky Numbers
implementation
800
x20335
261E
Maxim and Calculator
brute force
,
dp
,
two pointers
2800
x419
261D
Maxim and Increasing Subsequence
dp
2600
x587
261C
Maxim and Matrix
constructive algorithms
,
dp
,
math
2000
x781
261B
Maxim and Restaurant
dp
,
math
,
probabilities
1900
x1428
261A
Maxim and Discounts
greedy
,
sortings
1400
x5281
260E
Dividing Kingdom
binary search
,
brute force
,
data structures
2500
x467
260D
Black and White Tree
constructive algorithms
,
dsu
,
graphs
,
greedy
,
trees
2100
x1571
260C
Balls and Boxes
constructive algorithms
,
greedy
,
implementation
1700
x3000
260B
Ancient Prophesy
brute force
,
implementation
,
strings
1600
x3848
260A
Adding Digits
implementation
,
math
1400
x15157
259B
Little Elephant and Magic Square
brute force
,
implementation
1100
x14125
259A
Little Elephant and Chess
brute force
,
strings
1000
x9255
258E
Little Elephant and Tree
data structures
,
dfs and similar
,
trees
2400
x1152
258D
Little Elephant and Broken Sorting
dp
,
math
,
probabilities
2600
x1302
258C
Little Elephant and LCM
binary search
,
combinatorics
,
dp
,
math
2000
x1807
258B
Little Elephant and Elections
brute force
,
combinatorics
,
dp
1900
x1456
258A
Little Elephant and Bits
greedy
,
math
1100
x23542
257E
Greedy Elevator
data structures
,
implementation
2200
x302
257D
Sum
greedy
,
math
1900
x1638
257C
View Angle
brute force
,
geometry
,
math
1800
x4437
257B
Playing Cubes
games
,
greedy
,
implementation
1300
x7282
257A
Sockets
greedy
,
implementation
,
sortings
1100
x6571
256E
Lucky Arrays
data structures
2400
x672
256D
Liars and Serge
dp
2700
x259
255E
Furlo and Rublo and Game
games
,
implementation
,
math
2200
x879
255D
Mr. Bender and Square
binary search
,
implementation
,
math
1800
x2031
255C
Almost Arithmetical Progression
brute force
,
dp
1500
x4764
255B
Code Parsing
implementation
1200
x5032
255A
Greg's Workout
implementation
800
x29251
254E
Dormitory
dp
,
implementation
2100
x690
254D
Rats
brute force
,
dfs and similar
,
graphs
,
implementation
,
shortest paths
2300
x583
254C
Anagram
greedy
,
strings
1800
x1504
254B
Jury Size
brute force
,
implementation
1500
x2164
254A
Cards with Numbers
constructive algorithms
,
sortings
1200
x7186
253E
Printer
binary search
,
data structures
,
implementation
,
sortings
2200
x557
253D
Table with Letters - 2
brute force
,
two pointers
2000
x853
253C
Text Editor
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x2673
253B
Physics Practical
binary search
,
dp
,
sortings
,
two pointers
1400
x10972
253A
Boys and Girls
greedy
1100
x11392
252B
Unsorting Array
brute force
,
sortings
1800
x1729
252A
Little Xor
brute force
,
implementation
1100
x5402
251E
Tree and Table
dfs and similar
,
dp
,
implementation
,
trees
3000
x177
251D
Two Sets
bitmasks
,
math
2700
x484
251C
Number Transformation
dp
,
greedy
,
number theory
2000
x1052
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