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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
40:28:31
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Difficulty:
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data structures
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
1703B
ICPC Balloons
data structures
,
implementation
800
x44365
1760C
Advantage
data structures
,
implementation
,
sortings
800
x34450
1722C
Word Game
data structures
,
implementation
800
x29001
1714B
Remove Prefix
data structures
,
greedy
,
implementation
800
x28900
1690C
Restoring the Duration of Tasks
data structures
,
greedy
,
implementation
800
x25216
1497A
Meximization
brute force
,
data structures
,
greedy
,
sortings
800
x23766
1730A
Planets
data structures
,
greedy
,
sortings
800
x22371
1720B
Interesting Sum
brute force
,
data structures
,
greedy
,
math
,
sortings
800
x20654
1200A
Hotelier
brute force
,
data structures
,
implementation
800
x19850
1767B
Block Towers
data structures
,
greedy
,
sortings
800
x19484
1799A
Recent Actions
data structures
,
greedy
,
implementation
,
math
800
x11277
1807D
Odd Queries
data structures
,
implementation
900
x27514
1380A
Three Indices
brute force
,
data structures
900
x22663
1709B
Also Try Minecraft
data structures
,
dp
,
implementation
900
x21656
1918B
Minimize Inversions
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
900
x21507
1689B
Mystic Permutation
data structures
,
greedy
900
x16995
1430C
Numbers on Whiteboard
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
1000
x23111
1907B
YetnotherrokenKeoard
data structures
,
implementation
,
strings
1000
x22553
1800C1
Powering the Hero (easy version)
data structures
,
greedy
1000
x21920
1622B
Berland Music
data structures
,
greedy
,
math
,
sortings
1000
x20415
1165B
Polycarp Training
data structures
,
greedy
,
sortings
1000
x20054
1438B
Valerii Against Everyone
constructive algorithms
,
data structures
,
greedy
,
sortings
1000
x18129
1798B
Three Sevens
brute force
,
data structures
,
greedy
,
implementation
1000
x15735
368B
Sereja and Suffixes
data structures
,
dp
1100
x39074
519B
A and B and Compilation Errors
data structures
,
implementation
,
sortings
1100
x37360
1324C
Frog Jumps
binary search
,
data structures
,
dfs and similar
,
greedy
,
implementation
1100
x26634
1213B
Bad Prices
data structures
,
implementation
1100
x25342
1703D
Double Strings
brute force
,
data structures
,
strings
1100
x23798
1669F
Eating Candies
binary search
,
data structures
,
greedy
,
two pointers
1100
x22452
1511C
Yet Another Card Deck
brute force
,
data structures
,
implementation
,
trees
1100
x21776
1702C
Train and Queries
data structures
,
greedy
1100
x21135
1800C2
Powering the Hero (hard version)
data structures
,
greedy
1100
x20696
1638B
Odd Swap Sort
data structures
,
math
,
sortings
1100
x20267
1428C
ABBB
brute force
,
data structures
,
greedy
,
strings
1100
x19519
1921D
Very Different Array
data structures
,
greedy
,
sortings
,
two pointers
1100
x19449
1862C
Flower City Fence
binary search
,
data structures
,
implementation
,
sortings
1100
x19327
767A
Snacktower
data structures
,
implementation
1100
x19011
1760E
Binary Inversions
data structures
,
greedy
,
math
1100
x18900
1917B
Erase First or Second Letter
brute force
,
combinatorics
,
data structures
,
dp
,
strings
1100
x18598
1492B
Card Deck
data structures
,
greedy
,
math
1100
x18039
1807G1
Subsequence Addition (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
sortings
1100
x17580
1656B
Subtract Operation
data structures
,
greedy
,
math
,
two pointers
1100
x17324
501B
Misha and Changing Handles
data structures
,
dsu
,
strings
1100
x15332
1566D1
Seating Arrangements (easy version)
data structures
,
greedy
,
sortings
1100
x13672
427B
Prison Transfer
data structures
,
implementation
1100
x13640
755B
PolandBall and Game
binary search
,
data structures
,
games
,
greedy
,
sortings
,
strings
1100
x10852
522B
Photo to Remember
*special problem
,
data structures
,
dp
,
implementation
1100
x8615
834B
The Festive Evening
data structures
,
implementation
1100
x8471
1575A
Another Sorting Problem
data structures
,
sortings
,
strings
1100
x4164
1520D
Same Differences
data structures
,
hashing
,
math
1200
x41663
1364A
XXXXX
brute force
,
data structures
,
number theory
,
two pointers
1200
x26558
1512D
Corrupted Array
constructive algorithms
,
data structures
,
greedy
1200
x21480
1800D
Remove Two Letters
data structures
,
greedy
,
hashing
,
strings
1200
x21325
1006C
Three Parts of the Array
binary search
,
data structures
,
two pointers
1200
x19997
1598C
Delete Two Elements
data structures
,
dp
,
implementation
,
math
,
two pointers
1200
x19835
961B
Lecture Sleep
data structures
,
dp
,
implementation
,
two pointers
1200
x18890
1846C
Rudolf and the Another Competition
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1200
x17626
1793C
Dora and Search
constructive algorithms
,
data structures
,
two pointers
1200
x17595
1790D
Matryoshkas
data structures
,
greedy
,
sortings
1200
x17548
1669E
2-Letter Strings
data structures
,
math
,
strings
1200
x16628
1679B
Stone Age Problem
data structures
,
implementation
1200
x16578
1730C
Minimum Notation
data structures
,
greedy
,
math
,
sortings
1200
x15877
637B
Chat Order
*special problem
,
binary search
,
constructive algorithms
,
data structures
,
sortings
1200
x14818
1104B
Game with string
data structures
,
implementation
,
math
1200
x14364
1582C
Grandma Capa Knits a Scarf
brute force
,
data structures
,
greedy
,
strings
,
two pointers
1200
x14028
1763B
Incinerate
binary search
,
brute force
,
data structures
,
implementation
,
math
,
sortings
1200
x13726
1848B
Vika and the Bridge
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1200
x12949
1214C
Bad Sequence
data structures
,
greedy
1200
x12766
18C
Stripe
data structures
,
implementation
1200
x12333
879B
Table Tennis
data structures
,
implementation
1200
x11762
701B
Cells Not Under Attack
data structures
,
math
1200
x11530
264A
Escape from Stones
constructive algorithms
,
data structures
,
implementation
,
two pointers
1200
x10560
4C
Registration System
data structures
,
hashing
,
implementation
1300
x75691
600B
Queries about less or equal elements
binary search
,
data structures
,
sortings
,
two pointers
1300
x26865
1538C
Number of Pairs
binary search
,
data structures
,
math
,
two pointers
1300
x26461
1381A1
Prefix Flip (Easy Version)
constructive algorithms
,
data structures
,
strings
1300
x19749
1703F
Yet Another Problem About Pairs Satisfying an Inequality
binary search
,
data structures
,
dp
,
greedy
,
sortings
1300
x17715
1698C
3SUM Closure
brute force
,
data structures
1300
x17714
1915E
Romantic Glasses
data structures
,
greedy
,
math
1300
x17641
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x17423
1234B2
Social Network (hard version)
data structures
,
implementation
1300
x16377
1498B
Box Fitting
binary search
,
bitmasks
,
data structures
,
greedy
1300
x15815
1676F
Longest Strike
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1300
x15559
1237B
Balanced Tunnel
data structures
,
sortings
,
two pointers
1300
x14352
1736C1
Good Subarrays (Easy Version)
binary search
,
data structures
,
schedules
,
two pointers
1300
x14290
1638C
Inversion Graph
data structures
,
dsu
,
graphs
,
math
1300
x14265
1265B
Beautiful Numbers
data structures
,
implementation
,
math
,
two pointers
1300
x12229
1007A
Reorder the Array
combinatorics
,
data structures
,
math
,
sortings
,
two pointers
1300
x11940
1726C
Jatayu's Balanced Bracket Sequence
data structures
,
dsu
,
graphs
,
greedy
1300
x11795
1100B
Build a Contest
data structures
,
implementation
1300
x10856
1870C
Colorful Table
binary search
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1300
x10520
1867C
Salyg1n and the MEX Game
constructive algorithms
,
data structures
,
games
,
greedy
,
interactive
1300
x10370
777B
Game of Credit Cards
data structures
,
dp
,
greedy
,
sortings
1300
x9292
982B
Bus of Characters
data structures
,
greedy
,
implementation
1300
x8093
932B
Recursive Queries
binary search
,
data structures
,
dfs and similar
1300
x7719
572B
Order Book
data structures
,
greedy
,
implementation
,
sortings
1300
x6717
808B
Average Sleep Time
data structures
,
implementation
,
math
1300
x6391
222B
Cosmic Tables
data structures
,
implementation
1300
x5937
1424G
Years
data structures
,
sortings
1300
x5598
195B
After Training
data structures
,
implementation
,
math
1300
x5093
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