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Before contest
Codeforces Round 943 (Div. 3)
22:41:59
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Difficulty:
—
greedy
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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Custom test
Problems
#
Name
383A
Milking cows
data structures
,
greedy
1600
x5198
382A
Ksenia and Pan Scales
greedy
,
implementation
1100
x11749
381B
Sereja and Stairs
greedy
,
implementation
,
sortings
1100
x6577
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x60142
379C
New Year Ratings Change
greedy
,
sortings
1400
x6493
377B
Preparing for the Contest
binary search
,
data structures
,
greedy
,
sortings
1900
x1972
374B
Inna and Nine
combinatorics
,
greedy
1500
x3229
374A
Inna and Pink Pony
greedy
,
implementation
2000
x2841
372A
Counting Kangaroos is Fun
binary search
,
greedy
,
sortings
,
two pointers
1600
x12323
371E
Subway Innovation
greedy
,
math
,
two pointers
2000
x1204
371A
K-Periodic Array
greedy
,
implementation
,
math
1000
x5936
370E
Summer Reading
dp
,
greedy
2500
x229
370D
Broken Monitor
brute force
,
constructive algorithms
,
greedy
,
implementation
2100
x610
370C
Mittens
constructive algorithms
,
greedy
,
sortings
1800
x1501
369A
Valera and Plates
greedy
,
implementation
900
x10706
367C
Sereja and the Arrangement of Numbers
graphs
,
greedy
,
sortings
2000
x1700
364B
Free Market
dp
,
greedy
2200
x1149
363D
Renting Bikes
binary search
,
greedy
1800
x3741
363C
Fixing Typos
greedy
,
implementation
1400
x13052
362D
Fools and Foolproof Roads
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
2100
x895
362A
Two Semiknights Meet
greedy
,
math
1500
x2629
360E
Levko and Game
graphs
,
greedy
,
shortest paths
2800
x674
360A
Levko and Array Recovery
greedy
,
implementation
1700
x2020
359A
Table
constructive algorithms
,
greedy
,
implementation
1000
x8369
358D
Dima and Hares
dp
,
greedy
1800
x3869
358C
Dima and Containers
constructive algorithms
,
greedy
,
implementation
2000
x1945
357A
Group of Students
brute force
,
greedy
,
implementation
1000
x6675
356D
Bags and Coins
bitmasks
,
constructive algorithms
,
dp
,
greedy
2700
x936
356C
Compartments
combinatorics
,
constructive algorithms
,
greedy
,
implementation
2100
x1229
355B
Vasya and Public Transport
greedy
,
implementation
1100
x4428
354A
Vasya and Robot
brute force
,
greedy
,
math
1500
x5386
353E
Antichain
dp
,
graph matchings
,
greedy
2200
x567
353B
Two Heaps
combinatorics
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
1900
x2169
351E
Jeff and Permutation
greedy
2200
x1502
351A
Jeff and Rounding
dp
,
greedy
,
implementation
,
math
1800
x2680
350C
Bombs
greedy
,
implementation
,
sortings
1600
x6432
350A
TL
brute force
,
greedy
,
implementation
1200
x15925
349B
Color the Fence
data structures
,
dp
,
greedy
,
implementation
1700
x13479
349A
Cinema Line
greedy
,
implementation
1100
x28665
346C
Number Transformation II
greedy
,
math
2200
x1417
343E
Pumping Stations
brute force
,
dfs and similar
,
divide and conquer
,
flows
,
graphs
,
greedy
,
trees
2900
x670
343C
Read Time
binary search
,
greedy
,
two pointers
1900
x2896
343B
Alternating Current
data structures
,
greedy
,
implementation
1600
x13009
342B
Xenia and Spies
brute force
,
greedy
,
implementation
1500
x3983
342A
Xenia and Divisors
greedy
,
implementation
1200
x12103
341E
Candies Game
constructive algorithms
,
greedy
3000
x427
339E
Three Swaps
constructive algorithms
,
dfs and similar
,
greedy
2700
x538
339C
Xenia and Weights
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1700
x8123
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x197787
337C
Quiz
binary search
,
greedy
,
math
,
matrices
,
number theory
1600
x4768
337B
Routine Problem
greedy
,
math
,
number theory
1400
x9084
337A
Puzzles
greedy
900
x75411
336C
Vasily the Bear and Sequence
brute force
,
greedy
,
implementation
,
number theory
1800
x2367
335F
Buy One, Get One Free
dp
,
greedy
3000
x455
335A
Banana
binary search
,
constructive algorithms
,
greedy
1400
x2509
333B
Chips
greedy
1800
x2601
333A
Secrets
greedy
1600
x3925
332E
Binary Key
dp
,
greedy
,
implementation
2400
x294
332C
Students' Revenge
data structures
,
greedy
,
sortings
2200
x880
329A
Purification
constructive algorithms
,
greedy
1500
x4586
328B
Sheldon and Ice Pieces
greedy
1500
x1252
325E
The Red Button
combinatorics
,
dfs and similar
,
dsu
,
graphs
,
greedy
2800
x748
322A
Ciel and Dancing
greedy
1000
x8073
321D
Ciel and Flipboard
dp
,
greedy
,
math
2900
x525
321C
Ciel the Commander
constructive algorithms
,
dfs and similar
,
divide and conquer
,
greedy
,
trees
2100
x6768
321B
Ciel and Duel
dp
,
flows
,
greedy
1900
x2953
320A
Magic Numbers
brute force
,
greedy
900
x33535
319D
Have You Ever Heard About the Word?
greedy
,
hashing
,
string suffix structures
,
strings
2800
x611
316A1
Special Task
greedy
1100
x2579
313E
Ilya and Two Numbers
constructive algorithms
,
data structures
,
dsu
,
greedy
2300
x540
313C
Ilya and Matrix
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x5518
309E
Sheep
binary search
,
greedy
2900
x217
309C
Memory for Arrays
binary search
,
bitmasks
,
greedy
1900
x1288
306B
Optimizer
data structures
,
greedy
,
sortings
2100
x437
305C
Ivan and Powers of Two
greedy
,
implementation
1600
x2414
298B
Sail
brute force
,
greedy
,
implementation
1200
x13514
298A
Snow Footprints
greedy
,
implementation
1300
x10461
297B
Fish Weight
constructive algorithms
,
greedy
1600
x3439
296A
Yaroslav and Permutations
greedy
,
math
1100
x21932
294B
Shaass and Bookshelf
dp
,
greedy
1700
x4356
293A
Weird Game
games
,
greedy
1500
x2797
291D
Parallel Programming
*special problem
,
greedy
1600
x1467
290F
Greedy Petya
*special problem
,
dfs and similar
,
graphs
,
greedy
2800
x126
288A
Polo the Penguin and Strings
greedy
1300
x6276
286C
Main Sequence
greedy
,
implementation
2100
x1283
285C
Building Permutation
greedy
,
implementation
,
sortings
1200
x22436
285A
Slightly Decreasing Permutations
greedy
,
implementation
1100
x13084
282B
Painting Eggs
greedy
,
math
1500
x12547
279E
Beautiful Decomposition
dp
,
games
,
greedy
,
number theory
1900
x1410
276D
Little Girl and Maximum XOR
bitmasks
,
dp
,
greedy
,
implementation
,
math
1700
x12927
276C
Little Girl and Maximum Sum
data structures
,
greedy
,
implementation
,
sortings
1500
x23948
276B
Little Girl and Game
games
,
greedy
1300
x27196
274D
Lovely Matrix
dfs and similar
,
graphs
,
greedy
,
sortings
2200
x1005
274B
Zero Tree
dfs and similar
,
dp
,
greedy
,
trees
1800
x4884
274A
k-Multiple Free Set
binary search
,
greedy
,
sortings
1500
x9843
270B
Multithreading
data structures
,
greedy
,
implementation
1400
x4076
269C
Flawed Flow
constructive algorithms
,
flows
,
graphs
,
greedy
2100
x1592
269A
Magical Boxes
greedy
,
math
1600
x3473
266C
Below the Diagonal
constructive algorithms
,
greedy
,
math
2100
x1334
265B
Roadside Trees (Simplified Edition)
greedy
,
implementation
1000
x16877
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