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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
23:02:36
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→ Filter Problems
Difficulty:
—
greedy
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
804B
Minimum number of steps
combinatorics
,
greedy
,
implementation
,
math
1400
x9492
804A
Find Amir
constructive algorithms
,
greedy
,
math
1000
x14987
803D
Magazine Ad
binary search
,
greedy
1900
x3031
803C
Maximal GCD
constructive algorithms
,
greedy
,
math
1900
x4883
802M
April Fools' Problem (easy)
greedy
,
sortings
1200
x2984
802B
Heidi and Library (medium)
data structures
,
greedy
1800
x1004
802A
Heidi and Library (easy)
greedy
1800
x1269
801B
Valued Keys
constructive algorithms
,
greedy
,
strings
900
x9962
799E
Aquarium decoration
data structures
,
greedy
,
two pointers
2500
x909
798C
Mike and gcd problem
dp
,
greedy
,
number theory
1700
x5555
797F
Mice and Holes
data structures
,
dp
,
greedy
,
sortings
2600
x1066
797C
Minimal string
data structures
,
greedy
,
strings
1700
x6201
797B
Odd sum
dp
,
greedy
,
implementation
1400
x10094
796F
Sequence Recovery
bitmasks
,
data structures
,
greedy
2800
x167
794C
Naming Company
games
,
greedy
,
sortings
1800
x3014
792E
Colored Balls
greedy
,
math
,
number theory
2500
x1030
792C
Divide by Three
dp
,
greedy
,
math
,
number theory
2000
x4143
787B
Not Afraid
greedy
,
implementation
,
math
1300
x5565
785B
Anton and Classes
greedy
,
sortings
1100
x10074
780D
Innokenty and a Football League
2-sat
,
graphs
,
greedy
,
implementation
,
shortest paths
,
strings
1900
x2833
780C
Andryusha and Colored Balloons
dfs and similar
,
graphs
,
greedy
,
trees
1600
x8790
779C
Dishonest Sellers
constructive algorithms
,
greedy
,
sortings
1200
x11437
779B
Weird Rounding
brute force
,
greedy
1100
x10066
778A
String Game
binary search
,
greedy
,
strings
1700
x10982
777E
Hanoi Factory
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x3834
777D
Cloud of Hashtags
binary search
,
greedy
,
implementation
,
strings
1800
x4897
777C
Alyona and Spreadsheet
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
1600
x6248
777B
Game of Credit Cards
data structures
,
dp
,
greedy
,
sortings
1300
x9294
774C
Maximum Number
*special problem
,
constructive algorithms
,
greedy
,
implementation
1200
x3869
773C
Prairie Partition
binary search
,
constructive algorithms
,
greedy
,
math
2200
x934
773B
Dynamic Problem Scoring
brute force
,
greedy
2000
x1137
771E
Bear and Rectangle Strips
dp
,
greedy
3000
x437
771B
Bear and Different Names
constructive algorithms
,
greedy
1500
x6614
769C
Cycle In Maze
*special problem
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1700
x2086
769B
News About Credit
*special problem
,
greedy
,
two pointers
1200
x3224
767E
Change-free
greedy
2400
x936
767D
Cartons of milk
binary search
,
data structures
,
greedy
,
sortings
,
two pointers
2100
x2181
767C
Garland
dfs and similar
,
graphs
,
greedy
,
trees
2000
x3927
767B
The Queue
brute force
,
greedy
2100
x2102
766C
Mahmoud and a Message
brute force
,
dp
,
greedy
,
strings
1700
x4299
766B
Mahmoud and a Triangle
constructive algorithms
,
geometry
,
greedy
,
math
,
number theory
,
sortings
1000
x30539
765E
Tree Folding
dfs and similar
,
dp
,
greedy
,
implementation
,
trees
2200
x1243
765B
Code obfuscation
greedy
,
implementation
,
strings
1100
x6998
762D
Maximum path
dp
,
greedy
,
implementation
2300
x1280
762B
USB vs. PS/2
greedy
,
implementation
,
sortings
,
two pointers
1400
x7357
761E
Dasha and Puzzle
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2000
x1886
761D
Dasha and Very Difficult Problem
binary search
,
brute force
,
constructive algorithms
,
greedy
,
sortings
1700
x3931
760B
Frodo and pillows
binary search
,
greedy
1500
x6012
758E
Broken Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2600
x437
758D
Ability To Convert
constructive algorithms
,
dp
,
greedy
,
math
,
strings
2000
x2678
757B
Bash's Big Day
greedy
,
math
,
number theory
1400
x9724
755F
PolandBall and Gifts
bitmasks
,
dp
,
greedy
2600
x1223
755B
PolandBall and Game
binary search
,
data structures
,
games
,
greedy
,
sortings
,
strings
1100
x10853
754D
Fedor and coupons
binary search
,
data structures
,
greedy
,
sortings
2100
x2124
754A
Lesha and array splitting
constructive algorithms
,
greedy
,
implementation
1200
x8389
753A
Santa Claus and Candies
dp
,
greedy
,
math
1000
x8723
750C
New Year and Rating
binary search
,
greedy
,
math
1600
x6474
749C
Voting
greedy
,
implementation
,
two pointers
1500
x5895
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x45885
748E
Santa Claus and Tangerines
binary search
,
data structures
,
greedy
,
two pointers
2100
x1436
748D
Santa Claus and a Palindrome
constructive algorithms
,
data structures
,
greedy
2100
x1801
747D
Winter Is Coming
dp
,
greedy
,
sortings
1800
x2938
746F
Music in Car
data structures
,
greedy
,
two pointers
2200
x720
746E
Numbers Exchange
greedy
,
implementation
,
math
1900
x1703
746D
Green and Black Tea
constructive algorithms
,
greedy
,
math
1500
x4962
743A
Vladik and flights
constructive algorithms
,
greedy
,
implementation
1200
x10827
739A
Alyona and mex
constructive algorithms
,
greedy
1700
x7543
737E
Tanya is 5!
graph matchings
,
graphs
,
greedy
,
schedules
3300
x113
736E
Chess Championship
constructive algorithms
,
flows
,
greedy
,
math
2900
x176
735C
Tennis Championship
combinatorics
,
constructive algorithms
,
greedy
,
math
1600
x7303
735B
Urbanization
greedy
,
number theory
,
sortings
1100
x8199
734C
Anton and Making Potions
binary search
,
dp
,
greedy
,
two pointers
1600
x5272
734B
Anton and Digits
brute force
,
greedy
,
implementation
,
math
800
x28345
733C
Epidemic in Monstropolis
constructive algorithms
,
dp
,
greedy
,
two pointers
1800
x3285
732E
Sockets
greedy
,
sortings
2100
x1574
732D
Exams
binary search
,
greedy
,
sortings
1700
x5376
732C
Sanatorium
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1200
x9451
732B
Cormen --- The Best Friend Of a Man
dp
,
greedy
1000
x23947
731D
80-th Level Archeology
brute force
,
data structures
,
greedy
,
sortings
2200
x1135
731C
Socks
dfs and similar
,
dsu
,
graphs
,
greedy
1600
x6697
731B
Coupons and Discounts
constructive algorithms
,
greedy
1100
x7749
730I
Olympiad in Programming and Sports
dp
,
flows
,
graphs
,
greedy
2000
x1857
730E
Award Ceremony
greedy
,
implementation
2200
x706
730D
Running Over The Bridges
greedy
,
implementation
,
math
2200
x677
730A
Toda 2
greedy
,
implementation
1800
x1547
729E
Subordinates
constructive algorithms
,
data structures
,
graphs
,
greedy
,
sortings
1900
x2126
729D
Sea Battle
constructive algorithms
,
greedy
,
math
1700
x3597
729C
Road to Cinema
binary search
,
greedy
,
sortings
1700
x3822
727F
Polycarp's problems
binary search
,
dp
,
greedy
2300
x756
727D
T-shirts Distribution
constructive algorithms
,
flows
,
greedy
1800
x1790
725F
Family Photos
games
,
greedy
2900
x479
725E
Too Much Money
brute force
,
greedy
2600
x638
725D
Contest Balloons
data structures
,
greedy
1800
x2659
724E
Goods transportation
dp
,
flows
,
greedy
2900
x1195
724D
Dense Subsequence
data structures
,
greedy
,
strings
1900
x2235
724C
Ray Tracing
greedy
,
hashing
,
implementation
,
math
,
number theory
,
sortings
1800
x2093
724B
Batch Sort
brute force
,
greedy
,
implementation
,
math
1500
x3945
723F
st-Spanning Tree
dsu
,
graphs
,
greedy
,
implementation
2300
x1431
723E
One-Way Reform
constructive algorithms
,
dfs and similar
,
flows
,
graphs
,
greedy
2200
x1874
723D
Lakes in Berland
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
1600
x6783
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