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Before contest
Codeforces Round 937 (Div. 4)
02:52:55
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Difficulty:
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dp
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
368B
Sereja and Suffixes
data structures
,
dp
1100
x39073
367E
Sereja and Intervals
combinatorics
,
dp
2700
x1043
366C
Dima and Salad
dp
1900
x4481
364B
Free Market
dp
,
greedy
2200
x1143
363B
Fence
brute force
,
dp
1100
x48275
362C
Insertion Sort
data structures
,
dp
,
implementation
,
math
1900
x1631
360C
Levko and Strings
combinatorics
,
dp
2500
x1052
360B
Levko and Array
binary search
,
dp
2000
x2673
359B
Permutation
constructive algorithms
,
dp
,
math
1400
x7653
358D
Dima and Hares
dp
,
greedy
1800
x3842
356E
Xenia and String Problem
dp
,
hashing
,
implementation
,
string suffix structures
,
strings
3000
x396
356D
Bags and Coins
bitmasks
,
constructive algorithms
,
dp
,
greedy
2700
x923
354E
Lucky Number Representation
constructive algorithms
,
dfs and similar
,
dp
2200
x864
354D
Transferring Pyramid
dp
2900
x431
354C
Vasya and Beautiful Arrays
brute force
,
dp
,
number theory
2100
x2951
354B
Game with Strings
bitmasks
,
dp
,
games
2400
x447
353E
Antichain
dp
,
graph matchings
,
greedy
2200
x564
353D
Queue
constructive algorithms
,
dp
2000
x2696
351C
Jeff and Brackets
dp
,
matrices
2500
x535
351B
Jeff and Furik
combinatorics
,
dp
,
probabilities
1900
x2260
351A
Jeff and Rounding
dp
,
greedy
,
implementation
,
math
1800
x2674
349B
Color the Fence
data structures
,
dp
,
greedy
,
implementation
1700
x13395
348E
Pilgrims
dfs and similar
,
dp
,
trees
2800
x425
348D
Turtles
dp
,
matrices
2500
x1537
346D
Robot Control
dp
,
graphs
,
shortest paths
2600
x675
346B
Lucky Common Subsequence
dp
,
strings
2000
x3285
342D
Xenia and Dominoes
bitmasks
,
dfs and similar
,
dp
2100
x484
340D
Bubble Sort Graph
binary search
,
data structures
,
dp
1500
x6964
339C
Xenia and Weights
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1700
x8099
337D
Book of Evil
dfs and similar
,
divide and conquer
,
dp
,
trees
2000
x5733
336E
Vasily the Bear and Painting Square
bitmasks
,
combinatorics
,
dp
,
implementation
2700
x107
335F
Buy One, Get One Free
dp
,
greedy
3000
x453
335E
Counting Skyscrapers
dp
,
math
,
probabilities
2800
x202
335D
Rectangles and Square
brute force
,
dp
2400
x303
335B
Palindrome
constructive algorithms
,
dp
1900
x1954
332E
Binary Key
dp
,
greedy
,
implementation
2400
x292
332B
Maximum Absurdity
data structures
,
dp
,
implementation
1500
x7783
331E2
Deja Vu
constructive algorithms
,
dp
3100
x215
331C3
The Great Julya Calendar
dp
2500
x458
331C2
The Great Julya Calendar
dp
2400
x360
331C1
The Great Julya Calendar
dp
1100
x5890
327E
Axis Walking
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
meet-in-the-middle
2300
x1324
327A
Flipping Game
brute force
,
dp
,
implementation
1200
x39544
321E
Ciel and Gondolas
data structures
,
divide and conquer
,
dp
2600
x4426
321D
Ciel and Flipboard
dp
,
greedy
,
math
2900
x524
321B
Ciel and Duel
dp
,
flows
,
greedy
1900
x2927
319C
Kalila and Dimna in the Logging Industry
dp
,
geometry
2100
x4678
317D
Game with Powers
dp
,
games
2300
x965
316D3
PE Lesson
dp
,
math
2400
x524
316D2
PE Lesson
dp
2300
x414
316D1
PE Lesson
brute force
,
dp
2300
x476
316B2
EKG
dfs and similar
,
dp
1600
x1558
314E
Sereja and Squares
dp
2900
x351
314C
Sereja and Subsequences
data structures
,
dp
2000
x1757
313D
Ilya and Roads
dp
2100
x1402
313B
Ilya and Queries
dp
,
implementation
1100
x40949
311B
Cats Transport
data structures
,
dp
2400
x3129
309B
Context Advertising
dp
,
two pointers
2100
x495
303E
Random Ranking
dp
,
math
,
probabilities
3000
x299
301E
Yaroslav and Arrangements
dp
2800
x354
300D
Painting Square
dp
,
fft
2300
x723
296B
Yaroslav and Two Strings
combinatorics
,
dp
2000
x1933
295D
Greg and Caves
combinatorics
,
dp
2400
x632
295C
Greg and Friends
combinatorics
,
dp
,
graphs
,
shortest paths
2100
x1648
295B
Greg and Graph
dp
,
graphs
,
shortest paths
1700
x12749
294E
Shaass the Great
dp
,
trees
2300
x883
294B
Shaass and Bookshelf
dp
,
greedy
1700
x4325
292D
Connected Components
data structures
,
dfs and similar
,
dp
,
dsu
1900
x2296
289B
Polo the Penguin and Matrix
brute force
,
dp
,
implementation
,
sortings
,
ternary search
1400
x16631
288E
Polo the Penguin and Lucky Numbers
dp
,
implementation
,
math
2800
x279
285E
Positions in Permutations
combinatorics
,
dp
,
math
2600
x915
285D
Permutation Sum
bitmasks
,
combinatorics
,
dp
,
implementation
,
meet-in-the-middle
1900
x1501
283D
Cows and Cool Sequences
dp
,
math
,
number theory
2400
x518
283C
Coin Troubles
dp
2100
x1226
283B
Cow Program
dfs and similar
,
dp
,
graphs
1700
x3584
282D
Yet Another Number Game
dp
,
games
2100
x1367
280E
Sequence Transformation
brute force
,
data structures
,
dp
,
implementation
,
math
3000
x190
279E
Beautiful Decomposition
dp
,
games
,
greedy
,
number theory
1900
x1404
279D
The Minimum Number of Variables
bitmasks
,
dp
2200
x674
279C
Ladder
dp
,
implementation
,
two pointers
1700
x7995
277D
Google Code Jam
dp
,
probabilities
2800
x322
276D
Little Girl and Maximum XOR
bitmasks
,
dp
,
greedy
,
implementation
,
math
1700
x12785
274B
Zero Tree
dfs and similar
,
dp
,
greedy
,
trees
1800
x4859
273E
Dima and Game
dp
,
games
2600
x355
273D
Dima and Figure
dp
2400
x383
269D
Maximum Waterfall
data structures
,
dp
,
graphs
,
sortings
2600
x412
269B
Greenhouse Effect
dp
1700
x6076
268D
Wall Bars
dp
2300
x487
264E
Roadside Trees
data structures
,
dp
3000
x392
264D
Colorful Stones
dp
,
two pointers
2500
x405
264C
Choosing Balls
dp
2000
x2649
264B
Good Sequences
dp
,
number theory
1500
x9538
263E
Rhombus
brute force
,
data structures
,
dp
2500
x386
261E
Maxim and Calculator
brute force
,
dp
,
two pointers
2800
x402
261D
Maxim and Increasing Subsequence
dp
2600
x550
261C
Maxim and Matrix
constructive algorithms
,
dp
,
math
2000
x753
261B
Maxim and Restaurant
dp
,
math
,
probabilities
1900
x1356
258D
Little Elephant and Broken Sorting
dp
,
math
,
probabilities
2600
x1200
258C
Little Elephant and LCM
binary search
,
combinatorics
,
dp
,
math
2000
x1746
258B
Little Elephant and Elections
brute force
,
combinatorics
,
dp
1900
x1412
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