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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
22:52:55
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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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Status
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Custom test
Problems
#
Name
767B
The Queue
brute force
,
greedy
2100
x2141
766C
Mahmoud and a Message
brute force
,
dp
,
greedy
,
strings
1700
x4496
766B
Mahmoud and a Triangle
constructive algorithms
,
geometry
,
greedy
,
math
,
number theory
,
sortings
1000
x33218
765E
Tree Folding
dfs and similar
,
dp
,
greedy
,
implementation
,
trees
2200
x1286
765B
Code obfuscation
greedy
,
implementation
,
strings
1100
x7137
762D
Maximum path
dp
,
greedy
,
implementation
2300
x1581
762B
USB vs. PS/2
greedy
,
implementation
,
sortings
,
two pointers
1400
x8301
761E
Dasha and Puzzle
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2000
x2183
761D
Dasha and Very Difficult Problem
binary search
,
brute force
,
constructive algorithms
,
greedy
,
sortings
1700
x4068
760B
Frodo and pillows
binary search
,
greedy
1500
x6630
758E
Broken Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2600
x497
758D
Ability To Convert
constructive algorithms
,
dp
,
greedy
,
math
,
strings
2000
x2735
757B
Bash's Big Day
greedy
,
math
,
number theory
1400
x10314
755F
PolandBall and Gifts
bitmasks
,
dp
,
greedy
2600
x1440
755B
PolandBall and Game
binary search
,
data structures
,
games
,
greedy
,
sortings
,
strings
1100
x11350
754D
Fedor and coupons
binary search
,
data structures
,
greedy
,
sortings
2100
x2465
754A
Lesha and array splitting
constructive algorithms
,
greedy
,
implementation
1200
x8727
753A
Santa Claus and Candies
dp
,
greedy
,
math
1000
x9118
750C
New Year and Rating
binary search
,
greedy
,
math
1600
x6569
749C
Voting
greedy
,
implementation
,
two pointers
1500
x5991
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x49990
748E
Santa Claus and Tangerines
binary search
,
data structures
,
greedy
,
two pointers
2100
x1506
748D
Santa Claus and a Palindrome
constructive algorithms
,
data structures
,
greedy
2100
x1876
747D
Winter Is Coming
dp
,
greedy
,
sortings
1800
x3281
746F
Music in Car
data structures
,
greedy
,
two pointers
2200
x776
746E
Numbers Exchange
greedy
,
implementation
,
math
1900
x1741
746D
Green and Black Tea
constructive algorithms
,
greedy
,
math
1500
x5122
743A
Vladik and flights
constructive algorithms
,
greedy
,
implementation
1200
x11184
739A
Alyona and mex
constructive algorithms
,
greedy
1700
x7884
737E
Tanya is 5!
graph matchings
,
graphs
,
greedy
,
schedules
3300
x122
736E
Chess Championship
constructive algorithms
,
flows
,
greedy
,
math
2900
x187
735C
Tennis Championship
combinatorics
,
constructive algorithms
,
greedy
,
math
1600
x7546
735B
Urbanization
greedy
,
number theory
,
sortings
1100
x8401
734C
Anton and Making Potions
binary search
,
dp
,
greedy
,
two pointers
1600
x5347
734B
Anton and Digits
brute force
,
greedy
,
implementation
,
math
800
x29486
733C
Epidemic in Monstropolis
constructive algorithms
,
dp
,
greedy
,
two pointers
1800
x3348
732E
Sockets
greedy
,
sortings
2100
x1608
732D
Exams
binary search
,
greedy
,
sortings
1700
x5563
732C
Sanatorium
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1200
x9754
732B
Cormen --- The Best Friend Of a Man
dp
,
greedy
1000
x24651
731D
80-th Level Archeology
brute force
,
data structures
,
greedy
,
sortings
2200
x1178
731C
Socks
dfs and similar
,
dsu
,
graphs
,
greedy
1600
x7039
731B
Coupons and Discounts
constructive algorithms
,
greedy
1100
x8004
730I
Olympiad in Programming and Sports
dp
,
flows
,
graphs
,
greedy
2000
x2104
730E
Award Ceremony
greedy
,
implementation
2200
x723
730D
Running Over The Bridges
greedy
,
implementation
,
math
2200
x883
730A
Toda 2
greedy
,
implementation
1800
x1590
729E
Subordinates
constructive algorithms
,
data structures
,
graphs
,
greedy
,
sortings
1900
x2238
729D
Sea Battle
constructive algorithms
,
greedy
,
math
1700
x3772
729C
Road to Cinema
binary search
,
greedy
,
sortings
1700
x3938
727F
Polycarp's problems
binary search
,
dp
,
greedy
2300
x797
727D
T-shirts Distribution
constructive algorithms
,
flows
,
greedy
1800
x1887
725F
Family Photos
games
,
greedy
2900
x540
725E
Too Much Money
brute force
,
greedy
2600
x654
725D
Contest Balloons
data structures
,
greedy
1800
x2810
724E
Goods transportation
dp
,
flows
,
greedy
2900
x1317
724D
Dense Subsequence
data structures
,
greedy
,
strings
1900
x2343
724C
Ray Tracing
greedy
,
hashing
,
implementation
,
math
,
number theory
,
sortings
1800
x2145
724B
Batch Sort
brute force
,
greedy
,
implementation
,
math
1500
x4016
723F
st-Spanning Tree
dsu
,
graphs
,
greedy
,
implementation
2300
x1487
723E
One-Way Reform
constructive algorithms
,
dfs and similar
,
flows
,
graphs
,
greedy
2200
x2000
723D
Lakes in Berland
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
1600
x6975
723C
Polycarp at the Radio
greedy
1600
x4705
722D
Generating Sets
binary search
,
data structures
,
dfs and similar
,
greedy
,
strings
,
trees
1900
x3191
721D
Maxim and Array
constructive algorithms
,
data structures
,
greedy
,
math
2000
x2356
720A
Closing ceremony
greedy
2000
x865
719B
Anatoly and Cockroaches
greedy
1400
x8502
717B
R3D3’s Summer Adventure
dp
,
greedy
2700
x151
716B
Complete the Word
greedy
,
two pointers
1300
x12241
712C
Memory and De-Evolution
greedy
,
math
1600
x5851
709B
Checkpoints
greedy
,
implementation
,
sortings
1500
x4741
708C
Centroids
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2300
x3381
708B
Recover the String
constructive algorithms
,
greedy
,
implementation
,
math
1900
x3265
708A
Letters Cyclic Shift
constructive algorithms
,
greedy
,
implementation
,
strings
1200
x9016
704D
Captain America
flows
,
greedy
3100
x792
704B
Ant Man
dp
,
graphs
,
greedy
2500
x1878
702A
Maximum Increase
dp
,
greedy
,
implementation
800
x45573
701A
Cards
greedy
,
implementation
800
x19690
700D
Huffman Coding on Segment
data structures
,
greedy
3100
x462
689B
Mike and Shortcuts
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x6021
681C
Heap Operations
constructive algorithms
,
data structures
,
greedy
1600
x7818
679B
Bear and Tower of Cubes
binary search
,
dp
,
greedy
2200
x2152
675E
Trains and Statistic
data structures
,
dp
,
greedy
2300
x2791
675C
Money Transfers
constructive algorithms
,
data structures
,
greedy
,
sortings
2100
x3663
673B
Problems for Round
greedy
,
implementation
1300
x3524
671E
Organizing a Race
data structures
,
greedy
3300
x415
671D
Roads in Yusland
data structures
,
dp
,
greedy
2900
x1183
671B
Robin Hood
binary search
,
greedy
2000
x3038
671A
Recycling Bottles
dp
,
geometry
,
greedy
,
implementation
1800
x4193
670A
Holidays
brute force
,
constructive algorithms
,
greedy
,
math
900
x17080
665D
Simple Subset
constructive algorithms
,
greedy
,
number theory
1800
x3595
665C
Simple Strings
dp
,
greedy
,
strings
1300
x10658
663A
Rebus
constructive algorithms
,
expression parsing
,
greedy
,
math
1800
x3303
662E
To Hack or not to Hack
brute force
,
dp
,
greedy
3100
x139
662D
International Olympiad
constructive algorithms
,
greedy
,
implementation
,
math
2000
x1635
660A
Co-prime Array
greedy
,
implementation
,
math
,
number theory
1200
x9045
659F
Polycarp and Hay
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
2000
x1810
659E
New Reform
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
1600
x7492
659C
Tanya and Toys
greedy
,
implementation
1200
x11506
651B
Beautiful Paintings
greedy
,
sortings
1200
x11591
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