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Codeforces Round 977 (Div. 2)
2 days
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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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Problems
#
Name
1594E1
Rubik's Cube Coloring (easy version)
combinatorics
,
math
1300
x11090
1594C
Make Them Equal
brute force
,
greedy
,
math
,
strings
1200
x19444
1594B
Special Numbers
bitmasks
,
math
1100
x19888
1593D1
All are Same
math
,
number theory
1100
x20150
1592B
Hemose Shopping
constructive algorithms
,
dsu
,
math
,
sortings
1200
x15973
1585C
Minimize Distance
greedy
1300
x12009
1583B
Omkar and Heavenly Tree
constructive algorithms
,
trees
1200
x12240
1582C
Grandma Capa Knits a Scarf
brute force
,
data structures
,
greedy
,
strings
,
two pointers
1200
x15619
1581B
Diameter of Graph
constructive algorithms
,
graphs
,
greedy
,
math
1200
x11363
1579B
Shifting Sort
implementation
,
sortings
1100
x18139
1578E
Easy Scheduling
implementation
,
math
1200
x3822
1575A
Another Sorting Problem
data structures
,
sortings
,
strings
1100
x4559
1574C
Slay the Dragon
binary search
,
greedy
,
sortings
,
ternary search
1300
x17086
1574B
Combinatorics Homework
combinatorics
,
greedy
,
math
1100
x17296
1571B
Epic Novel
*special problem
,
math
1300
x714
1566D1
Seating Arrangements (easy version)
data structures
,
greedy
,
sortings
1100
x14000
1561C
Deep Down Below
binary search
,
greedy
,
sortings
1300
x14604
1560D
Make a Power of Two
greedy
,
math
,
strings
1300
x18189
1559C
Mocha and Hiking
constructive algorithms
,
graphs
1200
x20445
1558A
Charmed by the Game
brute force
,
math
1300
x11088
1557B
Moamen and k-subarrays
greedy
,
sortings
1100
x23433
1556B
Take Your Places!
implementation
1300
x12693
1555C
Coin Rows
brute force
,
constructive algorithms
,
dp
,
implementation
1300
x21708
1555B
Two Tables
brute force
1300
x16058
1553C
Penalty
bitmasks
,
brute force
,
dp
,
greedy
1200
x17846
1553B
Reverse String
brute force
,
dp
,
hashing
,
implementation
,
strings
1300
x14145
1547D
Co-growing Sequence
bitmasks
,
constructive algorithms
,
greedy
1300
x16679
1547C
Pair Programming
greedy
,
two pointers
1100
x22629
1546B
AquaMoon and Stolen String
interactive
,
math
1200
x13124
1541B
Pleasant Pairs
brute force
,
implementation
,
math
,
number theory
1200
x28495
1539C
Stable Groups
greedy
,
sortings
1200
x22881
1538C
Number of Pairs
binary search
,
data structures
,
math
,
two pointers
1300
x28498
1537C
Challenging Cliffs
constructive algorithms
,
greedy
,
implementation
,
math
1200
x27596
1536B
Prinzessin der Verurteilung
brute force
,
constructive algorithms
,
strings
1200
x18757
1534C
Little Alawn's Puzzle
combinatorics
,
dp
,
dsu
,
graphs
,
math
1300
x12805
1534B
Histogram Ugliness
greedy
,
implementation
,
math
1100
x12501
1530C
Pursuit
binary search
,
brute force
,
greedy
,
sortings
1200
x14646
1529B
Sifid and Strange Subsequences
greedy
,
math
,
sortings
1100
x20564
1527B1
Palindrome Game (easy version)
constructive algorithms
,
games
1200
x26079
1523B
Lord of the Values
constructive algorithms
1100
x12094
1521B
Nastia and a Good Array
constructive algorithms
,
math
,
number theory
1300
x21343
1520D
Same Differences
data structures
,
hashing
,
math
1200
x46820
1517B
Morning Jogging
constructive algorithms
,
greedy
,
sortings
1200
x13250
1514B
AND 0, Sum Big
bitmasks
,
combinatorics
,
math
1200
x24883
1512D
Corrupted Array
constructive algorithms
,
data structures
,
greedy
1200
x22547
1512C
A-B Palindrome
constructive algorithms
,
implementation
,
strings
1200
x20172
1511C
Yet Another Card Deck
brute force
,
data structures
,
implementation
,
trees
1100
x23781
1511B
GCD Length
constructive algorithms
,
math
,
number theory
1100
x22885
1510K
King's Task
brute force
,
graphs
,
implementation
1200
x5450
1509B
TMT Document
greedy
1100
x21591
1506B
Partial Replacement
greedy
,
implementation
1100
x20223
1504B
Flip the Bits
constructive algorithms
,
greedy
,
implementation
,
math
1200
x18514
1498B
Box Fitting
binary search
,
bitmasks
,
data structures
,
greedy
1300
x17173
1497C1
k-LCM (easy version)
constructive algorithms
,
math
1200
x25756
1497B
M-arrays
constructive algorithms
,
greedy
,
math
1200
x19909
1496B
Max and Mex
math
1100
x17552
1495A
Diamond Miner
geometry
,
greedy
,
math
,
sortings
1200
x17072
1493B
Planet Lapituletti
brute force
,
implementation
1300
x11845
1492B
Card Deck
data structures
,
greedy
,
math
1100
x18391
1491B
Minimal Cost
brute force
,
math
1200
x13799
1490D
Permutation Transformation
dfs and similar
,
divide and conquer
,
implementation
1200
x19514
1490C
Sum of Cubes
binary search
,
brute force
,
brute force
,
math
1100
x33191
1487B
Cat Cycle
math
,
number theory
1200
x21009
1485B
Replace and Keep Sorted
dp
,
implementation
,
math
1200
x17079
1481B
New Colony
brute force
,
greedy
,
implementation
1100
x19294
1478B
Nezzar and Lucky Number
brute force
,
dp
,
greedy
,
math
1100
x18284
1476B
Inflation
binary search
,
brute force
,
greedy
,
math
1300
x20017
1472D
Even-Odd Game
dp
,
games
,
greedy
,
sortings
1200
x27337
1472C
Long Jumps
dp
,
graphs
1100
x31300
1471B
Strange List
brute force
,
greedy
,
implementation
,
math
1100
x19328
1470A
Strange Birthday Party
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1300
x22445
1466C
Canine poetry
dp
,
greedy
,
strings
1300
x17644
1463A
Dungeon
binary search
,
math
1100
x25550
1459B
Move and Turn
dp
,
math
1300
x14793
1455C
Ping-pong
constructive algorithms
,
games
,
math
1100
x19589
1455B
Jumps
constructive algorithms
,
math
1200
x21829
1454D
Number into Sequence
constructive algorithms
,
math
,
number theory
1300
x20438
1454C
Sequence Transformation
greedy
,
implementation
1200
x21441
1446A
Knapsack
constructive algorithms
,
greedy
,
sortings
1300
x15496
1443B
Saving the City
dp
,
greedy
,
math
,
sortings
1300
x15774
1437B
Reverse Binary Strings
constructive algorithms
,
greedy
1200
x19187
1433E
Two Round Dances
combinatorics
,
math
1300
x18444
1433D
Districts Connection
constructive algorithms
,
dfs and similar
1200
x23147
1428C
ABBB
brute force
,
data structures
,
greedy
,
strings
1100
x20214
1428B
Belted Rooms
graphs
,
implementation
1200
x14377
1426C
Increase and Copy
binary search
,
constructive algorithms
,
math
1100
x19385
1425H
Huge Boxes of Animal Toys
constructive algorithms
1300
x4166
1424G
Years
data structures
,
sortings
1300
x5864
1422B
Nice Matrix
greedy
,
implementation
,
math
1300
x14404
1421B
Putting Bricks in the Wall
constructive algorithms
,
implementation
1100
x13058
1420C1
Pokémon Army (easy version)
constructive algorithms
,
dp
,
greedy
1300
x17584
1420B
Rock and Lever
bitmasks
,
math
1200
x25701
1419B
Stairs
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
1200
x16249
1418B
Negative Prefixes
greedy
,
sortings
1300
x16666
1417B
Two Arrays
greedy
,
math
,
sortings
1100
x14468
1415B
Repainting Street
brute force
,
brute force
,
greedy
1100
x12182
1413B
A New Technique
implementation
1100
x11717
1409C
Yet Another Array Restoration
brute force
,
math
,
number theory
1200
x23305
1409B
Minimum Product
brute force
,
greedy
,
math
1100
x28992
1407B
Big Vova
brute force
,
greedy
,
math
,
number theory
1300
x17017
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