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Codeforces Round 968 (Div. 2)
11:28:52
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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
1351C
Skier
data structures
,
implementation
1400
x8508
1351B
Square?
brute force
,
implementation
,
math
900
x16886
1351A
A+B (Trial Problem)
implementation
800
x23531
1349C
Orac and Game of Life
dfs and similar
,
graphs
,
implementation
,
shortest paths
2000
x4500
1348D
Phoenix and Science
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x8810
1343F
Restore the Permutation by Sorted Segments
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1252
1341B
Nastya and Door
greedy
,
implementation
1300
x19517
1340A
Nastya and Strange Generator
brute force
,
data structures
,
greedy
,
implementation
1500
x13390
1339A
Filling Diamonds
brute force
,
dp
,
implementation
,
math
900
x31747
1337B
Kana and Dragon Quest game
greedy
,
implementation
,
math
900
x33952
1335D
Anti-Sudoku
constructive algorithms
,
implementation
1300
x27261
1335C
Two Teams Composing
binary search
,
greedy
,
implementation
,
sortings
1100
x34338
1334D
Minimum Euler Cycle
constructive algorithms
,
graphs
,
greedy
,
implementation
1800
x7263
1334A
Level Statistics
implementation
,
math
1200
x23139
1333F
Kate and imperfection
greedy
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2200
x4239
1333D
Challenges in school №41
brute force
,
constructive algorithms
,
games
,
graphs
,
greedy
,
implementation
,
sortings
2100
x3915
1333C
Eugene and an array
binary search
,
data structures
,
implementation
,
two pointers
1700
x12524
1333B
Kind Anton
greedy
,
implementation
1100
x21560
1332C
K-Complete Word
dfs and similar
,
dsu
,
greedy
,
implementation
,
strings
1500
x16408
1332A
Exercising Walk
greedy
,
implementation
,
math
1100
x19374
1331E
Jordan Smiley
*special problem
,
dfs and similar
,
geometry
,
implementation
x1211
1331D
Again?
*special problem
,
implementation
x11876
1330B
Dreamoon Likes Permutations
implementation
,
math
1400
x13987
1330A
Dreamoon and Ranking Collection
implementation
900
x18641
1329C
Drazil Likes Heap
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1703
1329A
Dreamoon Likes Coloring
constructive algorithms
,
greedy
,
implementation
,
math
1800
x9060
1328C
Ternary XOR
greedy
,
implementation
1200
x30176
1328B
K-th Beautiful String
binary search
,
brute force
,
combinatorics
,
implementation
,
math
1300
x28910
1327C
Game with Chips
constructive algorithms
,
implementation
1600
x13367
1326B
Maximums
implementation
,
math
900
x23942
1325B
CopyCopyCopyCopyCopy
greedy
,
implementation
800
x35788
1324E
Sleeping Schedule
dp
,
implementation
1700
x13376
1324C
Frog Jumps
binary search
,
data structures
,
dfs and similar
,
greedy
,
implementation
1100
x27723
1324A
Yet Another Tetris Problem
implementation
,
number theory
900
x25845
1323B
Count Subrectangles
binary search
,
greedy
,
implementation
1500
x8899
1323A
Even Subset Sum Problem
brute force
,
dp
,
greedy
,
implementation
800
x19696
1316D
Nash Matrix
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
2000
x3367
1316B
String Modification
brute force
,
constructive algorithms
,
implementation
,
sortings
,
strings
1400
x11231
1316A
Grade Allocation
implementation
800
x18629
1315A
Dead Pixel
implementation
800
x12030
1313D
Happy New Year
bitmasks
,
dp
,
implementation
2500
x1327
1313B
Different Rules
constructive algorithms
,
greedy
,
implementation
,
math
1700
x6657
1313A
Fast Food Restaurant
brute force
,
greedy
,
implementation
900
x15451
1312C
Adding Powers
bitmasks
,
greedy
,
implementation
,
math
,
number theory
,
ternary search
1400
x16380
1311F
Moving Points
data structures
,
divide and conquer
,
implementation
,
sortings
1900
x4214
1311A
Add Odd or Subtract Even
greedy
,
implementation
,
math
800
x41582
1310B
Double Elimination
dp
,
implementation
2500
x495
1307E
Cow and Treats
binary search
,
combinatorics
,
dp
,
greedy
,
implementation
,
math
2500
x1271
1307A
Cow and Haybales
greedy
,
implementation
800
x14927
1305E
Kuroni and the Score Distribution
constructive algorithms
,
greedy
,
implementation
,
math
2200
x3077
1304C
Air Conditioner
dp
,
greedy
,
implementation
,
sortings
,
two pointers
1500
x16283
1304B
Longest Palindrome
brute force
,
constructive algorithms
,
greedy
,
implementation
,
strings
1100
x17799
1303F
Number of Components
dsu
,
implementation
2800
x528
1303C
Perfect Keyboard
dfs and similar
,
greedy
,
implementation
1600
x12114
1303A
Erasing Zeroes
implementation
,
strings
800
x31838
1301F
Super Jaber
dfs and similar
,
graphs
,
implementation
,
shortest paths
2600
x1246
1301E
Nanosoft
binary search
,
data structures
,
dp
,
implementation
2500
x1494
1301D
Time to Run
constructive algorithms
,
graphs
,
implementation
2000
x3979
1301A
Three Strings
implementation
,
strings
800
x19322
1300B
Assigning to Classes
greedy
,
implementation
,
sortings
1000
x23181
1300A
Non-zero
implementation
,
math
800
x20953
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
x14760
1294E
Obtain a Permutation
greedy
,
implementation
,
math
1900
x4891
1294D
MEX maximizing
data structures
,
greedy
,
implementation
,
math
1600
x11679
1294B
Collecting Packages
implementation
,
sortings
1200
x21670
1293A
ConneR and the A.R.C. Markland-N
binary search
,
brute force
,
implementation
1100
x15358
1292B
Aroma's Search
brute force
,
constructive algorithms
,
geometry
,
greedy
,
implementation
1700
x6309
1292A
NEKO's Maze Game
data structures
,
dsu
,
implementation
1400
x13287
1291B
Array Sharpening
greedy
,
implementation
1300
x14120
1290A
Mind Control
brute force
,
data structures
,
implementation
1600
x8543
1287B
Hyperset
brute force
,
data structures
,
implementation
1500
x9412
1287A
Angry Students
greedy
,
implementation
800
x20519
1286F
Harry The Potter
brute force
,
constructive algorithms
,
dp
,
fft
,
implementation
,
math
3100
x243
1285B
Just Eat It!
dp
,
greedy
,
implementation
1300
x22326
1284B
New Year and Ascent Sequence
binary search
,
combinatorics
,
data structures
,
dp
,
implementation
,
sortings
1400
x10807
1284A
New Year and Naming
implementation
,
strings
800
x17973
1282A
Temporarily unavailable
implementation
,
math
900
x14742
1281A
Suffix Three
implementation
800
x17920
1280B
Beingawesomeism
implementation
,
math
1800
x3924
1280A
Cut and Paste
implementation
,
math
1700
x5368
1279C
Stack of Presents
data structures
,
implementation
1400
x11656
1279B
Verse For Santa
binary search
,
brute force
,
implementation
1300
x13581
1278C
Berry Jam
data structures
,
dp
,
greedy
,
implementation
1700
x7947
1278A
Shuffle Hashing
brute force
,
implementation
,
strings
1000
x16512
1277D
Let's Play the Words?
data structures
,
hashing
,
implementation
,
math
1900
x3109
1277A
Happy Birthday, Polycarp!
implementation
1000
x13269
1272C
Yet Another Broken Keyboard
combinatorics
,
dp
,
implementation
1200
x26246
1272B
Snow Walking Robot
constructive algorithms
,
greedy
,
implementation
1200
x13849
1271D
Portals
data structures
,
dp
,
greedy
,
implementation
,
sortings
2100
x3001
1271C
Shawarma Tent
brute force
,
geometry
,
greedy
,
implementation
1300
x10473
1268A
Long Beautiful Integer
constructive algorithms
,
greedy
,
implementation
,
strings
1700
x8534
1267J
Just Arrange the Icons
greedy
,
implementation
,
math
1800
x2794
1267I
Intriguing Selection
brute force
,
constructive algorithms
,
implementation
,
interactive
,
sortings
2600
x875
1266E
Spaceship Solitaire
data structures
,
greedy
,
implementation
2100
x2225
1266D
Decreasing Debts
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
math
,
two pointers
2000
x3608
1265B
Beautiful Numbers
data structures
,
implementation
,
math
,
two pointers
1300
x12541
1264A
Beautiful Regional Contest
greedy
,
implementation
1500
x10037
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