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Codeforces Round 950 (Div. 3)
03:54:07
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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
767B
The Queue
brute force
,
greedy
2100
x2112
767A
Snacktower
data structures
,
implementation
1100
x19370
766E
Mahmoud and a xor trip
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
math
,
trees
2100
x2860
766D
Mahmoud and a Dictionary
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
2000
x3279
766C
Mahmoud and a Message
brute force
,
dp
,
greedy
,
strings
1700
x4330
766B
Mahmoud and a Triangle
constructive algorithms
,
geometry
,
greedy
,
math
,
number theory
,
sortings
1000
x31385
766A
Mahmoud and Longest Uncommon Subsequence
constructive algorithms
,
strings
1000
x29136
765G
Math, math everywhere
brute force
,
dp
,
math
,
meet-in-the-middle
,
number theory
3200
x82
765F
Souvenirs
data structures
3100
x1872
765E
Tree Folding
dfs and similar
,
dp
,
greedy
,
implementation
,
trees
2200
x1248
765D
Artsem and Saunders
constructive algorithms
,
dsu
,
math
1700
x2446
765C
Table Tennis Game 2
math
1200
x6855
765B
Code obfuscation
greedy
,
implementation
,
strings
1100
x7045
765A
Neverending competitions
implementation
,
math
900
x8879
764B
Timofey and cubes
constructive algorithms
,
implementation
900
x11649
764A
Taymyr is calling you
brute force
,
implementation
,
math
800
x16067
763E
Timofey and our friends animals
data structures
,
divide and conquer
,
dsu
2900
x476
763D
Timofey and a flat tree
data structures
,
graphs
,
hashing
,
shortest paths
,
trees
2900
x516
763C
Timofey and remoduling
brute force
,
implementation
,
math
,
number theory
2600
x706
763B
Timofey and rectangles
constructive algorithms
,
geometry
2100
x2582
763A
Timofey and a tree
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
1600
x10176
762F
Tree nesting
combinatorics
,
graphs
,
trees
2800
x346
762E
Radio stations
binary search
,
data structures
2200
x1293
762D
Maximum path
dp
,
greedy
,
implementation
2300
x1298
762C
Two strings
binary search
,
hashing
,
strings
,
two pointers
2100
x2380
762B
USB vs. PS/2
greedy
,
implementation
,
sortings
,
two pointers
1400
x7568
762A
k-th divisor
math
,
number theory
1400
x18295
761F
Dasha and Photos
brute force
,
data structures
,
dp
,
implementation
2600
x408
761E
Dasha and Puzzle
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2000
x1911
761D
Dasha and Very Difficult Problem
binary search
,
brute force
,
constructive algorithms
,
greedy
,
sortings
1700
x3946
761C
Dasha and Password
brute force
,
dp
,
implementation
1500
x5843
761B
Dasha and friends
brute force
,
implementation
,
math
1300
x6813
761A
Dasha and Stairs
brute force
,
constructive algorithms
,
implementation
,
math
1000
x14353
760B
Frodo and pillows
binary search
,
greedy
1500
x6245
760A
Petr and a calendar
implementation
,
math
800
x7750
758F
Geometrical Progression
brute force
,
math
,
number theory
2400
x621
758E
Broken Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2600
x445
758D
Ability To Convert
constructive algorithms
,
dp
,
greedy
,
math
,
strings
2000
x2690
758C
Unfair Poll
binary search
,
constructive algorithms
,
implementation
,
math
1700
x3823
758B
Blown Garland
brute force
,
implementation
,
number theory
1100
x10080
758A
Holiday Of Equality
implementation
,
math
800
x57864
757G
Can Bash Save the Day?
data structures
,
divide and conquer
,
graphs
,
trees
3400
x483
757F
Team Rocket Rises Again
data structures
,
graphs
,
shortest paths
2800
x1101
757E
Bash Plays with Functions
brute force
,
combinatorics
,
dp
,
number theory
2500
x1270
757D
Felicity's Big Secret Revealed
bitmasks
,
dp
2200
x1276
757C
Felicity is Coming!
data structures
,
hashing
,
sortings
,
strings
1900
x2312
757B
Bash's Big Day
greedy
,
math
,
number theory
1400
x9936
757A
Gotta Catch Em' All!
implementation
1000
x11099
756F
Long number
expression parsing
,
math
,
number theory
3400
x91
756E
Byteland coins
combinatorics
,
dp
,
math
3200
x154
756D
Bacterial Melee
brute force
,
combinatorics
,
dp
,
string suffix structures
2400
x982
756C
Nikita and stack
data structures
2200
x1283
756B
Travel Card
binary search
,
dp
1600
x3351
756A
Pavel and barbecue
constructive algorithms
,
dfs and similar
1700
x2965
755G
PolandBall and Many Other Balls
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3200
x869
755F
PolandBall and Gifts
bitmasks
,
dp
,
greedy
2600
x1282
755E
PolandBall and White-Red graph
constructive algorithms
,
graphs
,
shortest paths
2400
x818
755D
PolandBall and Polygon
data structures
2000
x2473
755C
PolandBall and Forest
dfs and similar
,
dsu
,
graphs
,
interactive
,
trees
1300
x11765
755B
PolandBall and Game
binary search
,
data structures
,
games
,
greedy
,
sortings
,
strings
1100
x10974
755A
PolandBall and Hypothesis
brute force
,
graphs
,
math
,
number theory
800
x17597
754E
Dasha and cyclic table
bitmasks
,
brute force
,
fft
,
strings
,
trees
2600
x482
754D
Fedor and coupons
binary search
,
data structures
,
greedy
,
sortings
2100
x2139
754C
Vladik and chat
brute force
,
constructive algorithms
,
dp
,
implementation
,
strings
2200
x915
754B
Ilya and tic-tac-toe game
brute force
,
implementation
1100
x7173
754A
Lesha and array splitting
constructive algorithms
,
greedy
,
implementation
1200
x8555
753C
Interactive Bulls and Cows (Hard)
brute force
,
constructive algorithms
,
interactive
2500
x283
753B
Interactive Bulls and Cows (Easy)
brute force
,
constructive algorithms
,
implementation
1600
x1174
753A
Santa Claus and Candies
dp
,
greedy
,
math
1000
x8797
750H
New Year and Snowy Grid
dfs and similar
,
dsu
,
graphs
,
interactive
3500
x189
750G
New Year and Binary Tree Paths
bitmasks
,
brute force
,
combinatorics
,
dp
3200
x442
750F
New Year and Finding Roots
constructive algorithms
,
implementation
,
interactive
,
trees
2800
x478
750E
New Year and Old Subsequence
data structures
,
divide and conquer
,
dp
,
matrices
2600
x1469
750D
New Year and Fireworks
brute force
,
data structures
,
dfs and similar
,
dp
,
implementation
1900
x3063
750C
New Year and Rating
binary search
,
greedy
,
math
1600
x6497
750B
New Year and North Pole
geometry
,
implementation
1300
x9433
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x71618
749E
Inversions After Shuffle
data structures
,
probabilities
2400
x1035
749D
Leaving Auction
binary search
,
data structures
2000
x2528
749C
Voting
greedy
,
implementation
,
two pointers
1500
x5917
749B
Parallelogram is Back
brute force
,
constructive algorithms
,
geometry
1200
x8387
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x46970
748F
Santa Clauses and a Soccer Championship
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2300
x634
748E
Santa Claus and Tangerines
binary search
,
data structures
,
greedy
,
two pointers
2100
x1443
748D
Santa Claus and a Palindrome
constructive algorithms
,
data structures
,
greedy
2100
x1813
748C
Santa Claus and Robot
constructive algorithms
,
math
1400
x4547
748B
Santa Claus and Keyboard Check
implementation
,
strings
1500
x5288
748A
Santa Claus and a Place in a Class
implementation
,
math
800
x8662
747F
Igor and Interesting Numbers
brute force
,
combinatorics
,
dp
,
math
2500
x413
747E
Comments
dfs and similar
,
expression parsing
,
implementation
,
strings
1700
x1940
747D
Winter Is Coming
dp
,
greedy
,
sortings
1800
x3015
747C
Servers
implementation
1300
x4499
747B
Mammoth's Genome Decoding
implementation
,
strings
900
x8588
747A
Display Size
brute force
,
math
800
x10059
746G
New Roads
constructive algorithms
,
graphs
,
trees
2100
x1356
746F
Music in Car
data structures
,
greedy
,
two pointers
2200
x724
746E
Numbers Exchange
greedy
,
implementation
,
math
1900
x1711
746D
Green and Black Tea
constructive algorithms
,
greedy
,
math
1500
x4996
746C
Tram
constructive algorithms
,
implementation
,
math
1600
x3687
746B
Decoding
implementation
,
strings
900
x26465
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