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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
41:18:51
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binary search
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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Problems
#
Name
1419F
Rain of Fire
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
2800
x493
1419D2
Sage's Birthday (hard version)
binary search
,
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x15721
1419D1
Sage's Birthday (easy version)
binary search
,
constructive algorithms
,
greedy
,
sortings
1000
x24541
1418E
Expected Damage
binary search
,
combinatorics
,
probabilities
2400
x1895
1416E
Split
binary search
,
data structures
,
dp
,
greedy
3200
x346
1416A
k-Amazing Numbers
binary search
,
data structures
,
implementation
,
two pointers
1500
x12700
1413C
Perform Easily
binary search
,
brute force
,
dp
,
implementation
,
sortings
,
two pointers
1900
x5755
1409E
Two Platforms
binary search
,
dp
,
sortings
,
two pointers
1800
x7879
1408H
Rainbow Triples
binary search
,
data structures
,
flows
,
greedy
3300
x411
1408D
Searchlights
binary search
,
brute force
,
data structures
,
dp
,
implementation
,
sortings
,
two pointers
2000
x4360
1408C
Discrete Acceleration
binary search
,
dp
,
implementation
,
math
,
two pointers
1500
x8889
1404C
Fixed Point Removal
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2300
x2706
1403A
The Potion of Great Power
*special problem
,
2-sat
,
binary search
,
data structures
,
graphs
,
interactive
,
sortings
,
two pointers
2400
x293
1401F
Reverse and Swap
binary search
,
bitmasks
,
data structures
2400
x1767
1399E2
Weights Division (hard version)
binary search
,
dfs and similar
,
greedy
,
sortings
,
trees
,
two pointers
2200
x2290
1398F
Controversial Rounds
binary search
,
data structures
,
dp
,
greedy
,
two pointers
2500
x1293
1398E
Two Types of Spells
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
2200
x2434
1394C
Boboniu and String
binary search
,
geometry
,
ternary search
2600
x1119
1392F
Omkar and Landslide
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
2400
x2183
1387A
Graph
*special problem
,
binary search
,
dfs and similar
,
dp
,
math
,
ternary search
2100
x727
1386A
Colors
*special problem
,
binary search
,
constructive algorithms
,
interactive
2700
x306
1379F1
Chess Strikes Back (easy version)
binary search
,
data structures
2700
x604
1379D
New Passenger Trams
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
2300
x1087
1379C
Choosing flowers
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
greedy
,
sortings
,
two pointers
2000
x5617
1379B
Dubious Cyrpto
binary search
,
brute force
,
math
,
number theory
1500
x12712
1373F
Network Coverage
binary search
,
constructive algorithms
,
data structures
,
greedy
2400
x1674
1372F
Omkar and Modes
binary search
,
divide and conquer
,
interactive
2700
x451
1371E2
Asterism (Hard Version)
binary search
,
combinatorics
,
dp
,
math
,
number theory
,
sortings
2300
x2357
1371E1
Asterism (Easy Version)
binary search
,
brute force
,
combinatorics
,
math
,
number theory
,
sortings
1900
x5259
1370F2
The Hidden Pair (Hard Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2700
x1499
1370F1
The Hidden Pair (Easy Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2400
x1624
1370E
Binary Subsequence Rotation
binary search
,
constructive algorithms
,
data structures
,
greedy
2100
x4919
1370D
Odd-Even Subsequence
binary search
,
dp
,
dsu
,
greedy
,
implementation
2000
x9769
1367F2
Flying Sort (Hard Version)
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2400
x1683
1366F
Jog Around The Graph
binary search
,
dp
,
geometry
,
graphs
2700
x818
1366E
Two Arrays
binary search
,
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
two pointers
2100
x4301
1366A
Shovels and Swords
binary search
,
greedy
,
math
1100
x30351
1363D
Guess The Maximums
binary search
,
implementation
,
interactive
,
math
2100
x4098
1361C
Johnny and Megan's Necklace
binary search
,
bitmasks
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2500
x1646
1360H
Binary Median
binary search
,
bitmasks
,
brute force
,
constructive algorithms
2100
x4604
1359F
RC Kaboom Show
binary search
,
brute force
,
data structures
,
geometry
,
math
2900
x543
1359C
Mixing Water
binary search
,
math
1700
x13932
1358F
Tasty Cookie
binary search
,
constructive algorithms
,
greedy
,
implementation
2700
x459
1358D
The Best Vacation
binary search
,
brute force
,
greedy
,
implementation
,
two pointers
1900
x8222
1355E
Restorer Distance
binary search
,
greedy
,
math
,
sortings
,
ternary search
2100
x5195
1355C
Count Triangles
binary search
,
implementation
,
math
,
two pointers
1800
x10736
1354G
Find a Gift
binary search
,
interactive
,
probabilities
2600
x797
1354D
Multiset
binary search
,
data structures
1900
x8897
1354C2
Not So Simple Polygon Embedding
binary search
,
brute force
,
geometry
,
math
2000
x6111
1354C1
Simple Polygon Embedding
binary search
,
geometry
,
math
,
ternary search
1400
x15737
1354B
Ternary String
binary search
,
dp
,
implementation
,
two pointers
1200
x31285
1352C
K-th Not Divisible by n
binary search
,
math
1200
x55750
1348D
Phoenix and Science
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x8913
1345B
Card Constructions
binary search
,
brute force
,
dp
,
math
1100
x26620
1344D
Résumé Review
binary search
,
greedy
,
math
2700
x1170
1342D
Multiple Testcases
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
,
two pointers
1900
x6126
1336B
Xenia and Colorful Gems
binary search
,
greedy
,
math
,
sortings
,
two pointers
1700
x11418
1335E1
Three Blocks Palindrome (easy version)
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x10898
1335C
Two Teams Composing
binary search
,
greedy
,
implementation
,
sortings
1100
x34957
1334F
Strange Function
binary search
,
data structures
,
dp
,
greedy
2500
x1324
1333C
Eugene and an array
binary search
,
data structures
,
implementation
,
two pointers
1700
x12642
1329E
Dreamoon Loves AA
binary search
,
greedy
3300
x186
1328B
K-th Beautiful String
binary search
,
brute force
,
combinatorics
,
implementation
,
math
1300
x29326
1326D2
Prefix-Suffix Palindrome (Hard version)
binary search
,
greedy
,
hashing
,
string suffix structures
,
strings
1800
x10254
1324D
Pair of Topics
binary search
,
data structures
,
sortings
,
two pointers
1400
x28791
1324C
Frog Jumps
binary search
,
data structures
,
dfs and similar
,
greedy
,
implementation
1100
x28145
1323B
Count Subrectangles
binary search
,
greedy
,
implementation
1500
x9101
1322B
Present
binary search
,
bitmasks
,
constructive algorithms
,
data structures
,
math
,
sortings
2100
x4255
1315B
Homecoming
binary search
,
dp
,
greedy
,
strings
1300
x9228
1310C
Au Pont Rouge
binary search
,
dp
,
strings
2800
x529
1307E
Cow and Treats
binary search
,
combinatorics
,
dp
,
greedy
,
implementation
,
math
2500
x1287
1307D
Cow and Fields
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
sortings
1900
x6464
1305H
Kuroni the Private Tutor
binary search
,
greedy
3500
x121
1301E
Nanosoft
binary search
,
data structures
,
dp
,
implementation
2500
x1532
1301C
Ayoub's function
binary search
,
combinatorics
,
greedy
,
math
,
strings
1700
x9384
1301B
Motarack's Birthday
binary search
,
greedy
,
ternary search
1500
x14339
1297D
Bonus Distribution
*special problem
,
binary search
,
greedy
,
sortings
x262
1293A
ConneR and the A.R.C. Markland-N
binary search
,
brute force
,
implementation
1100
x15486
1290B
Irreducible Anagrams
binary search
,
constructive algorithms
,
data structures
,
strings
,
two pointers
1800
x5513
1288D
Minimax Problem
binary search
,
bitmasks
,
dp
2000
x7290
1288A
Deadline
binary search
,
brute force
,
math
,
ternary search
1100
x18429
1285F
Classical?
binary search
,
combinatorics
,
number theory
2900
x1154
1284D
New Year and Conference
binary search
,
data structures
,
hashing
,
sortings
2100
x3180
1284B
New Year and Ascent Sequence
binary search
,
combinatorics
,
data structures
,
dp
,
implementation
,
sortings
1400
x10863
1279F
New Year and Handle Change
binary search
,
dp
2800
x902
1279B
Verse For Santa
binary search
,
brute force
,
implementation
1300
x13706
1275F
Шардирование постов
*special problem
,
binary search
,
interactive
x92
1271E
Common Number
binary search
,
combinatorics
,
dp
,
math
2100
x3458
1268C
K Integers
binary search
,
data structures
2300
x1761
1263C
Everyone is a Winner!
binary search
,
math
,
meet-in-the-middle
,
number theory
1400
x13795
1260D
A Game with Traps
binary search
,
dp
,
greedy
,
sortings
1900
x3871
1260B
Obtain Two Zeroes
binary search
,
math
1300
x15863
1257D
Yet Another Monster Killing Problem
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
1700
x7617
1253F
Cheap Robot
binary search
,
dsu
,
graphs
,
shortest paths
,
trees
2500
x1870
1251E2
Voting (Hard Version)
binary search
,
data structures
,
greedy
2400
x2686
1251D
Salary Changing
binary search
,
greedy
,
sortings
1900
x6055
1250L
Divide The Students
binary search
,
greedy
,
math
1500
x4126
1250J
The Parade
binary search
,
greedy
1800
x2970
1250I
Show Must Go On
binary search
,
brute force
,
greedy
,
shortest paths
3100
x135
1249C2
Good Numbers (hard version)
binary search
,
greedy
,
math
,
meet-in-the-middle
1500
x12709
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