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Codeforces Round 972 (Div. 2)
32:28:41
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→ Filter Problems
Difficulty:
—
implementation
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
1358F
Tasty Cookie
binary search
,
constructive algorithms
,
greedy
,
implementation
2700
x447
1358E
Are You Fired?
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x2310
1358D
The Best Vacation
binary search
,
brute force
,
greedy
,
implementation
,
two pointers
1900
x8140
1355C
Count Triangles
binary search
,
implementation
,
math
,
two pointers
1800
x10610
1355A
Sequence with Digits
brute force
,
implementation
,
math
1200
x26464
1354B
Ternary String
binary search
,
dp
,
implementation
,
two pointers
1200
x30670
1352E
Special Elements
brute force
,
implementation
,
two pointers
1500
x20415
1352D
Alice, Bob and Candies
implementation
1300
x26030
1352A
Sum of Round Numbers
implementation
,
math
800
x78461
1351C
Skier
data structures
,
implementation
1400
x8532
1351B
Square?
brute force
,
implementation
,
math
900
x16931
1351A
A+B (Trial Problem)
implementation
800
x23670
1349C
Orac and Game of Life
dfs and similar
,
graphs
,
implementation
,
shortest paths
2000
x4516
1348D
Phoenix and Science
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x8831
1343F
Restore the Permutation by Sorted Segments
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1257
1341B
Nastya and Door
greedy
,
implementation
1300
x19623
1340A
Nastya and Strange Generator
brute force
,
data structures
,
greedy
,
implementation
1500
x13402
1339A
Filling Diamonds
brute force
,
dp
,
implementation
,
math
900
x31860
1337B
Kana and Dragon Quest game
greedy
,
implementation
,
math
900
x34079
1335D
Anti-Sudoku
constructive algorithms
,
implementation
1300
x27329
1335C
Two Teams Composing
binary search
,
greedy
,
implementation
,
sortings
1100
x34464
1334D
Minimum Euler Cycle
constructive algorithms
,
graphs
,
greedy
,
implementation
1800
x7278
1334A
Level Statistics
implementation
,
math
1200
x23190
1333F
Kate and imperfection
greedy
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2200
x4246
1333D
Challenges in school №41
brute force
,
constructive algorithms
,
games
,
graphs
,
greedy
,
implementation
,
sortings
2100
x3920
1333C
Eugene and an array
binary search
,
data structures
,
implementation
,
two pointers
1700
x12551
1333B
Kind Anton
greedy
,
implementation
1100
x21583
1332C
K-Complete Word
dfs and similar
,
dsu
,
greedy
,
implementation
,
strings
1500
x16506
1332A
Exercising Walk
greedy
,
implementation
,
math
1100
x19386
1331E
Jordan Smiley
*special problem
,
dfs and similar
,
geometry
,
implementation
x1211
1331D
Again?
*special problem
,
implementation
x11879
1330B
Dreamoon Likes Permutations
implementation
,
math
1400
x14001
1330A
Dreamoon and Ranking Collection
implementation
900
x18660
1329C
Drazil Likes Heap
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1705
1329A
Dreamoon Likes Coloring
constructive algorithms
,
greedy
,
implementation
,
math
1800
x9090
1328C
Ternary XOR
greedy
,
implementation
1200
x30259
1328B
K-th Beautiful String
binary search
,
brute force
,
combinatorics
,
implementation
,
math
1300
x28996
1327C
Game with Chips
constructive algorithms
,
implementation
1600
x13400
1326B
Maximums
implementation
,
math
900
x23991
1325B
CopyCopyCopyCopyCopy
greedy
,
implementation
800
x35891
1324E
Sleeping Schedule
dp
,
implementation
1700
x13444
1324C
Frog Jumps
binary search
,
data structures
,
dfs and similar
,
greedy
,
implementation
1100
x27819
1324A
Yet Another Tetris Problem
implementation
,
number theory
900
x25904
1323B
Count Subrectangles
binary search
,
greedy
,
implementation
1500
x8937
1323A
Even Subset Sum Problem
brute force
,
dp
,
greedy
,
implementation
800
x19731
1316D
Nash Matrix
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
2000
x3377
1316B
String Modification
brute force
,
constructive algorithms
,
implementation
,
sortings
,
strings
1400
x11251
1316A
Grade Allocation
implementation
800
x18643
1315A
Dead Pixel
implementation
800
x12039
1313D
Happy New Year
bitmasks
,
dp
,
implementation
2500
x1335
1313B
Different Rules
constructive algorithms
,
greedy
,
implementation
,
math
1700
x6667
1313A
Fast Food Restaurant
brute force
,
greedy
,
implementation
900
x15468
1312C
Adding Powers
bitmasks
,
greedy
,
implementation
,
math
,
number theory
,
ternary search
1400
x16463
1311F
Moving Points
data structures
,
divide and conquer
,
implementation
,
sortings
1900
x4230
1311A
Add Odd or Subtract Even
greedy
,
implementation
,
math
800
x41741
1310B
Double Elimination
dp
,
implementation
2500
x502
1307E
Cow and Treats
binary search
,
combinatorics
,
dp
,
greedy
,
implementation
,
math
2500
x1276
1307A
Cow and Haybales
greedy
,
implementation
800
x14941
1305E
Kuroni and the Score Distribution
constructive algorithms
,
greedy
,
implementation
,
math
2200
x3092
1304C
Air Conditioner
dp
,
greedy
,
implementation
,
sortings
,
two pointers
1500
x16326
1304B
Longest Palindrome
brute force
,
constructive algorithms
,
greedy
,
implementation
,
strings
1100
x17836
1303F
Number of Components
dsu
,
implementation
2800
x532
1303C
Perfect Keyboard
dfs and similar
,
greedy
,
implementation
1600
x12127
1303A
Erasing Zeroes
implementation
,
strings
800
x32024
1301F
Super Jaber
dfs and similar
,
graphs
,
implementation
,
shortest paths
2600
x1273
1301E
Nanosoft
binary search
,
data structures
,
dp
,
implementation
2500
x1521
1301D
Time to Run
constructive algorithms
,
graphs
,
implementation
2000
x3992
1301A
Three Strings
implementation
,
strings
800
x19344
1300B
Assigning to Classes
greedy
,
implementation
,
sortings
1000
x23316
1300A
Non-zero
implementation
,
math
800
x20966
1297F
Movie Fan
*special problem
,
data structures
,
greedy
,
implementation
,
sortings
x117
1297B
Cartoons
*special problem
,
implementation
,
sortings
x413
1297A
Likes Display
*special problem
,
implementation
x941
1296C
Yet Another Walking Robot
data structures
,
implementation
1500
x14780
1294E
Obtain a Permutation
greedy
,
implementation
,
math
1900
x4910
1294D
MEX maximizing
data structures
,
greedy
,
implementation
,
math
1600
x11701
1294B
Collecting Packages
implementation
,
sortings
1200
x21736
1293A
ConneR and the A.R.C. Markland-N
binary search
,
brute force
,
implementation
1100
x15379
1292B
Aroma's Search
brute force
,
constructive algorithms
,
geometry
,
greedy
,
implementation
1700
x6326
1292A
NEKO's Maze Game
data structures
,
dsu
,
implementation
1400
x13312
1291B
Array Sharpening
greedy
,
implementation
1300
x14151
1290A
Mind Control
brute force
,
data structures
,
implementation
1600
x8556
1287B
Hyperset
brute force
,
data structures
,
implementation
1500
x9424
1287A
Angry Students
greedy
,
implementation
800
x20553
1286F
Harry The Potter
brute force
,
constructive algorithms
,
dp
,
fft
,
implementation
,
math
3100
x243
1285B
Just Eat It!
dp
,
greedy
,
implementation
1300
x22485
1284B
New Year and Ascent Sequence
binary search
,
combinatorics
,
data structures
,
dp
,
implementation
,
sortings
1400
x10811
1284A
New Year and Naming
implementation
,
strings
800
x17986
1282A
Temporarily unavailable
implementation
,
math
900
x14758
1281A
Suffix Three
implementation
800
x17924
1280B
Beingawesomeism
implementation
,
math
1800
x3927
1280A
Cut and Paste
implementation
,
math
1700
x5387
1279C
Stack of Presents
data structures
,
implementation
1400
x11678
1279B
Verse For Santa
binary search
,
brute force
,
implementation
1300
x13626
1278C
Berry Jam
data structures
,
dp
,
greedy
,
implementation
1700
x8017
1278A
Shuffle Hashing
brute force
,
implementation
,
strings
1000
x16593
1277D
Let's Play the Words?
data structures
,
hashing
,
implementation
,
math
1900
x3114
1277A
Happy Birthday, Polycarp!
implementation
1000
x13288
1272C
Yet Another Broken Keyboard
combinatorics
,
dp
,
implementation
1200
x26382
1272B
Snow Walking Robot
constructive algorithms
,
greedy
,
implementation
1200
x13875
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