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Codeforces Round 972 (Div. 2)
42:12:14
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Difficulty:
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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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Custom test
Problems
#
Name
1579D
Productive Meeting
constructive algorithms
,
graphs
,
greedy
1400
x15906
1573B
Swaps
greedy
,
math
,
sortings
1400
x14495
1559D1
Mocha and Diana (Easy Version)
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
trees
1400
x13727
1551B2
Wonderful Coloring - 2
binary search
,
constructive algorithms
,
data structures
,
greedy
1400
x15441
1548A
Web of Lies
brute force
,
graphs
,
greedy
1400
x16370
1540A
Great Graphs
constructive algorithms
,
graphs
,
greedy
,
shortest paths
,
sortings
1400
x13894
1535C
Unstable String
binary search
,
dp
,
greedy
,
implementation
,
strings
,
two pointers
1400
x16425
1526B
I Hate 1111
dp
,
math
,
number theory
1400
x30271
1520E
Arranging The Sheep
greedy
,
math
1400
x21207
1519C
Berland Regional
brute force
,
data structures
,
greedy
,
number theory
,
sortings
1400
x16771
1517C
Fillomino 2
constructive algorithms
,
dfs and similar
,
greedy
,
implementation
1400
x13330
1515C
Phoenix and Towers
constructive algorithms
,
data structures
,
greedy
1400
x17042
1513B
AND Sequences
bitmasks
,
combinatorics
,
constructive algorithms
,
math
1400
x14586
1506D
Epic Transformation
constructive algorithms
,
data structures
,
greedy
1400
x21608
1505C
Fibonacci Words
*special problem
,
implementation
1400
x6415
1494B
Berland Crossword
bitmasks
,
brute force
,
greedy
,
implementation
1400
x14282
1490E
Accidental Victory
binary search
,
data structures
,
greedy
1400
x18968
1475C
Ball in Berland
combinatorics
,
graphs
,
math
1400
x21026
1468C
Berpizza
data structures
,
implementation
1400
x7761
1463B
Find The Array
bitmasks
,
constructive algorithms
,
greedy
1400
x19298
1462D
Add to Neighbour and Remove
greedy
,
math
,
number theory
1400
x16675
1461B
Find the Spruce
brute force
,
dp
,
implementation
1400
x12593
1453B
Suffix Operations
constructive algorithms
,
implementation
1400
x13315
1452B
Toy Blocks
binary search
,
greedy
,
math
,
sortings
1400
x14667
1451C
String Equality
dp
,
greedy
,
hashing
,
implementation
,
strings
1400
x15465
1443C
The Delivery Dilemma
binary search
,
greedy
,
sortings
1400
x15216
1431B
Polycarp and the Language of Gods
*special problem
,
implementation
,
two pointers
1400
x1008
1427B
Chess Cheater
greedy
,
implementation
,
sortings
1400
x10878
1425F
Flamingoes of Mystery
interactive
1400
x5632
1425A
Arena of Greed
games
,
greedy
1400
x6496
1421C
Palindromifier
constructive algorithms
,
strings
1400
x12759
1415C
Bouncing Ball
brute force
,
dp
,
implementation
1400
x10850
1408B
Arrays Sum
constructive algorithms
,
greedy
,
math
1400
x9932
1393B
Applejack and Storages
constructive algorithms
,
data structures
,
greedy
,
implementation
1400
x16647
1380C
Create The Teams
brute force
,
dp
,
greedy
,
implementation
,
sortings
1400
x20627
1380B
Universal Solution
greedy
1400
x14577
1375C
Element Extermination
constructive algorithms
,
data structures
,
greedy
1400
x21073
1374D
Zero Remainder Array
math
,
sortings
,
two pointers
1400
x23605
1370C
Number Game
games
,
math
,
number theory
1400
x24458
1369C
RationalLee
greedy
,
math
,
sortings
,
two pointers
1400
x19536
1365C
Rotation Matching
constructive algorithms
,
data structures
,
greedy
,
implementation
1400
x23041
1363B
Subsequence Hate
implementation
,
strings
1400
x23540
1362C
Johnny and Another Rating Drop
bitmasks
,
greedy
,
math
1400
x18194
1355D
Game With Array
constructive algorithms
,
math
1400
x17977
1354C1
Simple Polygon Embedding
binary search
,
geometry
,
math
,
ternary search
1400
x15655
1351C
Skier
data structures
,
implementation
1400
x8532
1350B
Orac and Models
dp
,
math
,
number theory
1400
x21999
1348B
Phoenix and Beauty
constructive algorithms
,
data structures
,
greedy
,
sortings
1400
x25257
1346B
Boot Camp
*special problem
,
greedy
1400
x1205
1332B
Composite Coloring
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1400
x17550
1330B
Dreamoon Likes Permutations
implementation
,
math
1400
x14001
1324D
Pair of Topics
binary search
,
data structures
,
sortings
,
two pointers
1400
x28060
1320A
Journey Planning
data structures
,
dp
,
greedy
,
math
,
sortings
1400
x16274
1316B
String Modification
brute force
,
constructive algorithms
,
implementation
,
sortings
,
strings
1400
x11251
1312C
Adding Powers
bitmasks
,
greedy
,
implementation
,
math
,
number theory
,
ternary search
1400
x16463
1303B
National Project
math
1400
x15707
1292A
NEKO's Maze Game
data structures
,
dsu
,
implementation
1400
x13312
1285C
Fadi and LCM
brute force
,
math
,
number theory
1400
x23227
1284B
New Year and Ascent Sequence
binary search
,
combinatorics
,
data structures
,
dp
,
implementation
,
sortings
1400
x10811
1282B1
K for the Price of One (Easy Version)
dp
,
greedy
,
sortings
1400
x11458
1279C
Stack of Presents
data structures
,
implementation
1400
x11678
1276A
As Simple as One and Two
dp
,
greedy
1400
x12285
1270C
Make Good
bitmasks
,
constructive algorithms
,
math
1400
x14061
1266C
Diverse Matrix
constructive algorithms
,
greedy
,
math
,
number theory
1400
x9679
1263C
Everyone is a Winner!
binary search
,
math
,
meet-in-the-middle
,
number theory
1400
x13671
1263B
PIN Codes
greedy
,
implementation
1400
x11349
1256B
Minimize the Permutation
greedy
1400
x13068
1253B
Silly Mistake
greedy
,
implementation
1400
x11170
1251B
Binary Palindromes
greedy
,
strings
1400
x10965
1250A
Berstagram
implementation
1400
x4075
1245C
Constanze's Machine
dp
1400
x17449
1228B
Filling the Grid
implementation
,
math
1400
x11499
1215B
The Number of Products
combinatorics
,
dp
,
implementation
1400
x12853
1214A
Optimal Currency Exchange
brute force
,
math
1400
x9082
1201C
Maximum Median
binary search
,
greedy
,
math
,
sortings
1400
x23232
1200C
Round Corridor
math
,
number theory
1400
x9844
1197C
Array Splitting
greedy
,
sortings
1400
x13852
1195C
Basketball Exercise
dp
1400
x25606
1190A
Tokitsukaze and Discard Items
implementation
,
two pointers
1400
x9341
1189C
Candies!
data structures
,
dp
,
implementation
,
math
1400
x10553
1184B1
The Doctor Meets Vader (Easy)
binary search
,
sortings
1400
x5219
1183D
Candy Box (easy version)
greedy
,
sortings
1400
x14157
1183C
Computer Game
binary search
,
math
1400
x13935
1167C
News Distribution
dfs and similar
,
dsu
,
graphs
1400
x18179
1167B
Lost Numbers
brute force
,
divide and conquer
,
interactive
,
math
1400
x11535
1162B
Double Matrix
brute force
,
greedy
1400
x5799
1156A
Inscribed Figures
geometry
1400
x8186
1154C
Gourmet Cat
implementation
,
math
1400
x10359
1144D
Equalize Them All
constructive algorithms
,
greedy
1400
x10223
1143C
Queen
dfs and similar
,
trees
1400
x12244
1131B
Draw!
greedy
,
implementation
1400
x9712
1130C
Connect
brute force
,
dfs and similar
,
dsu
1400
x8553
1110B
Tape
greedy
,
sortings
1400
x11466
1108D
Diverse Garland
constructive algorithms
,
dp
,
greedy
1400
x15024
1103A
Grid game
constructive algorithms
,
implementation
1400
x9740
1102B
Array K-Coloring
greedy
,
sortings
1400
x10354
1097C
Yuhao and a Parenthesis
greedy
,
implementation
1400
x8435
1095C
Powers Of Two
bitmasks
,
greedy
1400
x16719
1091C
New Year and the Sphere Transmission
math
,
number theory
1400
x9972
1088C
Ehab and a 2-operation task
constructive algorithms
,
greedy
,
math
1400
x8043
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