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Codeforces Round 973 (Div. 2)
14:01:47
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combine-tags-by-or
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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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Status
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Custom test
Problems
#
Name
1996C
Sort
dp
,
greedy
,
sortings
,
strings
1200
x21607
1996B
Scale
greedy
,
implementation
800
x31289
1996A
Legs
binary search
,
math
,
ternary search
800
x39819
1995E2
Let Me Teach You a Lesson (Hard Version)
data structures
,
dp
,
matrices
,
two pointers
2900
x281
1995E1
Let Me Teach You a Lesson (Easy Version)
2-sat
,
data structures
,
dp
,
matrices
,
two pointers
2700
x354
1995D
Cases
bitmasks
,
brute force
,
dp
,
strings
2300
x2192
1995C
Squaring
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
number theory
1800
x7876
1995B2
Bouquet (Hard Version)
binary search
,
data structures
,
greedy
,
math
,
sortings
,
two pointers
1700
x8279
1995B1
Bouquet (Easy Version)
binary search
,
brute force
,
greedy
,
sortings
,
two pointers
1100
x17041
1995A
Diagonals
brute force
,
greedy
,
implementation
,
math
800
x23448
1994H
Fortnite
combinatorics
,
constructive algorithms
,
games
,
greedy
,
hashing
,
interactive
,
math
,
number theory
,
strings
3500
x490
1994G
Minecraft
bitmasks
,
brute force
,
dp
,
graphs
,
math
2600
x1154
1994F
Stardew Valley
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2500
x1093
1994E
Wooden Game
bitmasks
,
greedy
,
math
,
trees
2000
x4199
1994D
Funny Game
constructive algorithms
,
dsu
,
graphs
,
greedy
,
math
,
number theory
,
trees
1900
x5409
1994C
Hungry Games
binary search
,
dp
,
two pointers
1600
x10054
1994B
Fun Game
bitmasks
,
constructive algorithms
,
greedy
,
math
1100
x15867
1994A
Diverse Game
constructive algorithms
,
greedy
,
implementation
800
x19592
1993F2
Dyn-scripted Robot (Hard Version)
chinese remainder theorem
,
math
,
number theory
2800
x359
1993F1
Dyn-scripted Robot (Easy Version)
brute force
,
chinese remainder theorem
,
constructive algorithms
,
math
,
number theory
2400
x913
1993E
Xor-Grid Problem
bitmasks
,
constructive algorithms
,
dp
,
implementation
2700
x468
1993D
Med-imize
binary search
,
dp
,
greedy
2200
x3474
1993C
Light Switches
implementation
,
math
1400
x12844
1993B
Parity and Sum
constructive algorithms
,
greedy
1100
x21649
1993A
Question Marks
greedy
,
implementation
800
x28155
1992G
Ultra-Meow
combinatorics
,
dp
,
math
2000
x2894
1992F
Valuable Cards
brute force
,
dp
,
greedy
,
number theory
,
two pointers
1900
x5449
1992E
Novice's Mistake
brute force
,
constructive algorithms
,
implementation
,
math
,
strings
1700
x8738
1992D
Test of Love
dp
,
greedy
,
implementation
1200
x19567
1992C
Gorilla and Permutation
constructive algorithms
,
math
900
x27928
1992B
Angry Monk
greedy
,
math
,
sortings
800
x32946
1992A
Only Pluses
brute force
,
constructive algorithms
,
greedy
,
math
,
sortings
800
x39322
1991I
Grid Game
constructive algorithms
,
games
,
graph matchings
,
greedy
,
interactive
3500
x59
1991H
Prime Split Game
bitmasks
,
dp
,
fft
,
games
,
math
,
number theory
3300
x256
1991G
Grid Reset
constructive algorithms
,
greedy
,
implementation
2700
x520
1991F
Triangle Formation
brute force
,
greedy
,
implementation
,
math
,
sortings
2200
x2145
1991E
Coloring Game
constructive algorithms
,
dfs and similar
,
games
,
graphs
,
greedy
,
interactive
1900
x3958
1991D
Prime XOR Coloring
bitmasks
,
constructive algorithms
,
graphs
,
greedy
,
math
,
number theory
1900
x6104
1991C
Absolute Zero
constructive algorithms
,
greedy
,
math
1300
x13605
1991B
AND Reconstruction
bitmasks
,
constructive algorithms
,
greedy
1100
x15646
1991A
Maximize the Last Element
greedy
,
implementation
800
x20970
1990F
Polygonal Segments
brute force
,
data structures
,
divide and conquer
,
dp
,
greedy
,
two pointers
2800
x256
1990E2
Catch the Mole(Hard Version)
binary search
,
data structures
,
dfs and similar
,
divide and conquer
,
interactive
,
trees
2600
x813
1990E1
Catch the Mole(Easy Version)
binary search
,
data structures
,
dfs and similar
,
interactive
,
trees
2500
x875
1990D
Grid Puzzle
bitmasks
,
brute force
,
dp
,
greedy
,
implementation
1800
x5907
1990C
Mad MAD Sum
brute force
,
greedy
,
math
1500
x10900
1990B
Array Craft
constructive algorithms
,
greedy
1200
x15659
1990A
Submission Bait
brute force
,
games
,
greedy
,
sortings
900
x21333
1989F
Simultaneous Coloring
dfs and similar
,
divide and conquer
,
graphs
3000
x431
1989E
Distance to Different
combinatorics
,
dp
,
math
2300
x1841
1989D
Smithing Skill
brute force
,
data structures
,
dp
,
greedy
,
math
,
sortings
,
two pointers
1900
x5667
1989C
Two Movies
greedy
,
math
1400
x17661
1989B
Substring and Subsequence
brute force
,
greedy
,
strings
1200
x19395
1989A
Catch the Coin
implementation
800
x25622
1988F
Heartbeat
combinatorics
,
dp
,
fft
,
math
3000
x180
1988E
Range Minimum Sum
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
2300
x1318
1988D
The Omnipotent Monster Killer
brute force
,
dfs and similar
,
dp
,
trees
2000
x4650
1988C
Increasing Sequence with Fixed OR
bitmasks
,
constructive algorithms
,
greedy
1300
x15720
1988B
Make Majority
greedy
,
implementation
900
x21606
1988A
Split the Multiset
brute force
,
greedy
,
implementation
,
math
900
x22085
1987H
Fumo Temple
interactive
3500
x94
1987G2
Spinning Round (Hard Version)
divide and conquer
,
dp
,
trees
3500
x147
1987G1
Spinning Round (Easy Version)
divide and conquer
,
dp
,
trees
2900
x252
1987F2
Interesting Problem (Hard Version)
dp
2600
x967
1987F1
Interesting Problem (Easy Version)
dp
2500
x1076
1987E
Wonderful Tree!
brute force
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
2000
x3196
1987D
World is Mine
dp
,
games
1800
x6801
1987C
Basil's Garden
dp
,
greedy
1200
x16648
1987B
K-Sort
greedy
1000
x19459
1987A
Upload More RAM
greedy
,
math
800
x24339
1986G2
Permutation Problem (Hard Version)
brute force
,
data structures
,
hashing
,
math
,
number theory
2500
x1010
1986G1
Permutation Problem (Simple Version)
binary search
,
brute force
,
combinatorics
,
data structures
,
math
,
number theory
2200
x1398
1986F
Non-academic Problem
dfs and similar
,
graphs
,
trees
1900
x4319
1986E
Beautiful Array
greedy
,
math
,
number theory
,
sortings
1700
x8365
1986D
Mathematical Problem
brute force
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1400
x14672
1986C
Update Queries
data structures
,
greedy
,
sortings
1100
x22207
1986B
Matrix Stabilization
brute force
,
data structures
,
greedy
,
sortings
1000
x25821
1986A
X Axis
brute force
,
geometry
,
math
,
sortings
800
x38862
1985H2
Maximize the Largest Component (Hard Version)
data structures
,
dfs and similar
,
dp
,
dsu
,
implementation
2200
x1457
1985H1
Maximize the Largest Component (Easy Version)
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
1700
x5358
1985G
D-Function
combinatorics
,
math
,
number theory
1600
x8902
1985F
Final Boss
binary search
,
data structures
1500
x14557
1985E
Secret Box
brute force
,
combinatorics
,
math
1200
x19290
1985D
Manhattan Circle
implementation
,
math
900
x33253
1985C
Good Prefixes
greedy
1000
x31058
1985B
Maximum Multiple Sum
brute force
,
math
,
number theory
800
x44210
1985A
Creating Words
implementation
,
strings
800
x50575
1984H
Tower Capturing
combinatorics
,
dp
,
geometry
3300
x164
1984G
Magic Trick II
constructive algorithms
,
implementation
,
sortings
3200
x249
1984F
Reconstruction
brute force
,
dp
,
math
2500
x894
1984E
Shuffle
dp
,
greedy
,
trees
2400
x1343
1984D
''a'' String Problem
brute force
,
hashing
,
implementation
,
math
,
string suffix structures
,
strings
2000
x3111
1984C2
Magnitude (Hard Version)
combinatorics
,
dp
,
greedy
,
math
1700
x7034
1984C1
Magnitude (Easy Version)
dp
,
greedy
,
math
1300
x15908
1984B
Large Addition
implementation
,
math
1100
x17703
1984A
Strange Splitting
constructive algorithms
800
x20547
1983G
Your Loss
bitmasks
,
brute force
,
dp
,
trees
3000
x203
1983F
array-value
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
2500
x1105
1983E
I Love Balls
combinatorics
,
math
,
probabilities
2300
x1891
1983D
Swap Dilemma
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
math
,
sortings
1700
x7864
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