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Codeforces Round 950 (Div. 3)
30:05:55
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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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Problems
#
Name
529B
Group Photo 2 (online mirror version)
brute force
,
greedy
,
sortings
1900
x854
528E
Triangles 3000
geometry
,
sortings
3100
x215
528D
Fuzzy Search
bitmasks
,
brute force
,
fft
2500
x2083
527E
Data Center Drama
dfs and similar
,
graphs
2600
x1816
527D
Clique Problem
data structures
,
dp
,
greedy
,
implementation
,
sortings
1800
x4663
527C
Glass Carving
binary search
,
data structures
,
implementation
1500
x6677
527B
Error Correct System
greedy
1500
x3857
527A
Playing with Paper
implementation
,
math
1100
x14147
526G
Spiders Evil Plan
greedy
,
trees
3300
x693
526F
Pudding Monsters
data structures
,
divide and conquer
3000
x2340
526E
Transmitting Levels
dp
,
implementation
2400
x1059
526D
Om Nom and Necklace
hashing
,
string suffix structures
,
strings
2200
x2103
526C
Om Nom and Candies
brute force
,
greedy
,
math
2000
x2273
526B
Om Nom and Dark Park
dfs and similar
,
greedy
,
implementation
1400
x4473
526A
King of Thieves
brute force
,
implementation
1300
x4727
525E
Anya and Cubes
binary search
,
bitmasks
,
brute force
,
dp
,
math
,
meet-in-the-middle
2100
x2810
525D
Arthur and Walls
constructive algorithms
,
data structures
,
graphs
,
greedy
,
shortest paths
2400
x1642
525C
Ilya and Sticks
greedy
,
math
,
sortings
1600
x5707
525B
Pasha and String
constructive algorithms
,
greedy
,
math
,
strings
1400
x9209
525A
Vitaliy and Pie
greedy
,
hashing
,
strings
1100
x13980
524F
And Yet Another Bracket Sequence
data structures
,
greedy
,
hashing
,
string suffix structures
,
strings
2700
x522
524E
Rooks and Rectangles
data structures
,
sortings
2400
x1165
524D
Social Network
greedy
,
two pointers
2100
x946
524C
The Art of Dealing with ATM
binary search
,
sortings
1900
x1982
524B
Фото на память - 2 (round version)
dp
,
greedy
1700
x1446
524A
Возможно, вы знаете этих людей?
implementation
1600
x1394
523D
Statistics of Recompressing Videos
*special problem
,
data structures
,
implementation
1600
x2251
523C
Name Quest
*special problem
,
greedy
1400
x2469
523B
Mean Requests
*special problem
,
implementation
1500
x943
523A
Rotate, Flip and Zoom
*special problem
,
implementation
1200
x2590
522D
Closest Equals
*special problem
,
data structures
2000
x2981
522C
Chicken or Fish?
greedy
2100
x712
522B
Photo to Remember
*special problem
,
data structures
,
dp
,
implementation
1100
x8702
522A
Reposts
*special problem
,
dfs and similar
,
dp
,
graphs
,
trees
1200
x15778
521E
Cycling City
dfs and similar
,
graphs
3100
x921
521D
Shop
greedy
2800
x1491
520E
Pluses everywhere
combinatorics
,
dp
,
math
,
number theory
2200
x1812
520D
Cubes
games
,
greedy
,
implementation
2100
x1534
520C
DNA Alignment
math
,
strings
1500
x4094
520B
Two Buttons
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
,
shortest paths
1400
x48369
520A
Pangram
implementation
,
strings
800
x90754
519E
A and B and Lecture Rooms
binary search
,
data structures
,
dfs and similar
,
dp
,
trees
2100
x6277
519D
A and B and Interesting Substrings
data structures
,
dp
,
two pointers
1800
x6287
519C
A and B and Team Training
greedy
,
implementation
,
math
,
number theory
1300
x19368
519B
A and B and Compilation Errors
data structures
,
implementation
,
sortings
1100
x37962
519A
A and B and Chess
implementation
900
x18625
518F
Pasha and Pipe
binary search
,
brute force
,
combinatorics
,
dp
,
implementation
2300
x354
518E
Arthur and Questions
greedy
,
implementation
,
math
,
ternary search
2200
x910
518D
Ilya and Escalator
combinatorics
,
dp
,
math
,
probabilities
1700
x6721
518C
Anya and Smartphone
constructive algorithms
,
data structures
,
implementation
1600
x5933
518B
Tanya and Postcard
greedy
,
implementation
,
strings
1400
x7822
518A
Vitaly and Strings
constructive algorithms
,
strings
1600
x9125
516E
Drazil and His Happy Friends
math
,
number theory
3100
x477
516D
Drazil and Morning Exercise
dfs and similar
,
dp
,
dsu
,
trees
,
two pointers
2800
x1230
515E
Drazil and Park
data structures
2300
x2062
515D
Drazil and Tiles
constructive algorithms
,
greedy
2000
x2766
515C
Drazil and Factorial
greedy
,
math
,
sortings
1400
x25087
515B
Drazil and His Happy Friends
brute force
,
dsu
,
meet-in-the-middle
,
number theory
1300
x7373
515A
Drazil and Date
math
1000
x19616
514E
Darth Vader and Tree
dp
,
matrices
2200
x1384
514D
R2D2 and Droid Army
binary search
,
data structures
,
two pointers
2000
x4149
514C
Watto and Mechanism
binary search
,
data structures
,
hashing
,
string suffix structures
,
strings
2000
x6549
514B
Han Solo and Lazer Gun
brute force
,
data structures
,
geometry
,
implementation
,
math
1400
x20274
514A
Chewbaсca and Number
greedy
,
implementation
1200
x46707
513G3
Inversions problem
dp
3100
x254
513G2
Inversions problem
dp
,
probabilities
2400
x629
513G1
Inversions problem
brute force
,
dfs and similar
,
dp
,
meet-in-the-middle
1800
x1757
513F2
Scaygerboss
flows
2800
x324
513F1
Scaygerboss
flows
2700
x305
513E2
Subarray Cuts
dp
2700
x552
513E1
Subarray Cuts
dp
2600
x470
513D2
Constrained Tree
constructive algorithms
,
data structures
2600
x367
513D1
Constrained Tree
dfs and similar
2400
x427
513C
Second price auction
bitmasks
,
probabilities
2000
x1517
513B2
Permutations
bitmasks
,
divide and conquer
,
math
1800
x2565
513B1
Permutations
brute force
1400
x3577
513A
Game
constructive algorithms
,
math
800
x19979
512E
Fox And Polygon
constructive algorithms
,
divide and conquer
2900
x504
512D
Fox And Travelling
dp
,
trees
2900
x933
510E
Fox And Dinner
flows
2300
x2154
510D
Fox And Jumping
bitmasks
,
brute force
,
dp
,
math
1900
x5209
510C
Fox And Names
dfs and similar
,
graphs
,
sortings
1600
x15256
510B
Fox And Two Dots
dfs and similar
1500
x13489
510A
Fox And Snake
implementation
800
x77988
509F
Progress Monitoring
dp
,
trees
2300
x865
509E
Pretty Song
math
,
strings
2000
x1773
509D
Restoring Numbers
constructive algorithms
,
math
2200
x734
509C
Sums of Digits
dp
,
greedy
,
implementation
2000
x2015
509B
Painting Pebbles
constructive algorithms
,
greedy
,
implementation
1300
x9535
509A
Maximum in Table
brute force
,
implementation
800
x37413
508E
Arthur and Brackets
dp
,
greedy
2200
x1538
508D
Tanya and Password
dfs and similar
,
graphs
2500
x3113
508C
Anya and Ghosts
constructive algorithms
,
greedy
1600
x4420
508B
Anton and currency you all know
greedy
,
math
,
strings
1300
x22157
508A
Pasha and Pixels
brute force
1100
x7797
507E
Breaking Good
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2647
507D
The Maths Lecture
dp
,
implementation
2200
x1702
507C
Guess Your Way Out!
implementation
,
math
,
trees
1700
x4284
507B
Amr and Pins
geometry
,
math
1400
x23959
507A
Amr and Music
greedy
,
implementation
,
sortings
1000
x17349
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