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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
4 days
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→ Filter Problems
Difficulty:
—
implementation
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
812D
Sagheer and Kindergarten
dfs and similar
,
graphs
,
implementation
,
trees
2700
x326
81E
Pairs
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
2700
x327
1202F
You Are Given Some Letters...
binary search
,
implementation
,
math
2700
x372
1120B
Once in a casino
constructive algorithms
,
greedy
,
implementation
,
math
2700
x405
1358F
Tasty Cookie
binary search
,
constructive algorithms
,
greedy
,
implementation
2700
x436
70E
Information Reform
dp
,
implementation
,
trees
2700
x478
1789F
Serval and Brain Power
bitmasks
,
brute force
,
dp
,
greedy
,
implementation
,
strings
2700
x521
1621F
Strange Instructions
data structures
,
greedy
,
implementation
2700
x533
1025E
Colored Cubes
constructive algorithms
,
implementation
,
matrices
2700
x548
1627F
Not Splitting
geometry
,
graphs
,
greedy
,
implementation
,
shortest paths
2700
x553
1942F
Farmer John's Favorite Function
brute force
,
data structures
,
implementation
,
math
2700
x568
1774F2
Magician and Pigs (Hard Version)
binary search
,
brute force
,
data structures
,
implementation
2700
x643
1817D
Toy Machine
constructive algorithms
,
games
,
implementation
2700
x673
1421E
Swedish Heroes
brute force
,
dp
,
implementation
2700
x674
1956E2
Nene vs. Monsters (Hard Version)
brute force
,
greedy
,
implementation
,
math
2700
x687
1567F
One-Four Overload
2-sat
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
implementation
2700
x728
1422E
Minlexes
dp
,
greedy
,
implementation
,
strings
2700
x731
1720E
Misha and Paintings
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
2700
x739
1617E
Christmas Chocolates
dfs and similar
,
dp
,
games
,
graphs
,
implementation
,
math
,
number theory
,
shortest paths
,
trees
2700
x835
1149C
Tree Generator™
data structures
,
implementation
,
trees
2700
x1174
1856E2
PermuTree (hard version)
bitmasks
,
dfs and similar
,
dp
,
fft
,
greedy
,
implementation
,
math
,
trees
2700
x1317
1634F
Fibonacci Additions
brute force
,
data structures
,
hashing
,
implementation
,
math
2700
x1530
374E
Inna and Babies
binary search
,
data structures
,
dsu
,
geometry
,
implementation
2600
x178
1505G
Encoded message
*special problem
,
implementation
2600
x292
1949J
Amanda the Amoeba
graphs
,
implementation
,
trees
,
two pointers
2600
x321
761F
Dasha and Photos
brute force
,
data structures
,
dp
,
implementation
2600
x404
1081F
Tricky Interactor
constructive algorithms
,
implementation
,
interactive
2600
x449
685D
Kay and Eternity
brute force
,
implementation
,
sortings
2600
x477
36E
Two Paths
constructive algorithms
,
dsu
,
graphs
,
implementation
2600
x496
484C
Strange Sorting
implementation
,
math
2600
x580
1896F
Bracket Xoring
constructive algorithms
,
greedy
,
implementation
,
math
2600
x657
7E
Defining Macros
dp
,
expression parsing
,
implementation
2600
x689
763C
Timofey and remoduling
brute force
,
implementation
,
math
,
number theory
2600
x704
1267I
Intriguing Selection
brute force
,
constructive algorithms
,
implementation
,
interactive
,
sortings
2600
x731
1848E
Vika and Stone Skipping
brute force
,
implementation
,
math
,
number theory
2600
x746
235E
Number Challenge
combinatorics
,
dp
,
implementation
,
math
,
number theory
2600
x749
1919E
Counting Prefixes
combinatorics
,
constructive algorithms
,
dp
,
implementation
,
math
2600
x779
1569E
Playoff Restoration
bitmasks
,
brute force
,
hashing
,
implementation
,
meet-in-the-middle
2600
x785
1805F1
Survival of the Weakest (easy version)
binary search
,
brute force
,
implementation
,
math
,
sortings
2600
x825
1368F
Lamps on a Circle
games
,
implementation
,
interactive
,
math
2600
x848
1566F
Points Movement
data structures
,
dp
,
greedy
,
implementation
,
sortings
2600
x928
1301F
Super Jaber
dfs and similar
,
graphs
,
implementation
,
shortest paths
2600
x1089
1793F
Rebrending
brute force
,
data structures
,
divide and conquer
,
implementation
2600
x1292
1439C
Greedy Shopping
binary search
,
data structures
,
divide and conquer
,
greedy
,
implementation
2600
x1678
1416D
Graph and Queries
data structures
,
dsu
,
graphs
,
implementation
,
trees
2600
x1875
1090G
Combostone
games
,
implementation
2500
x104
363E
Two Circles
brute force
,
data structures
,
implementation
2500
x192
173D
Deputies
constructive algorithms
,
graphs
,
greedy
,
implementation
2500
x246
121D
Lucky Segments
binary search
,
implementation
,
two pointers
2500
x272
135D
Cycle
brute force
,
dfs and similar
,
implementation
2500
x293
294D
Shaass and Painter Robot
brute force
,
implementation
,
number theory
2500
x299
44G
Shooting Gallery
data structures
,
implementation
2500
x366
852A
Digits
brute force
,
implementation
,
math
2500
x379
930D
Game with Tokens
data structures
,
games
,
implementation
2500
x394
93C
Azembler
brute force
,
implementation
2500
x410
1866K
Keen Tree Calculation
binary search
,
data structures
,
dp
,
geometry
,
graphs
,
implementation
,
trees
2500
x412
1228F
One Node is Gone
constructive algorithms
,
implementation
,
trees
2500
x417
832C
Strange Radiation
binary search
,
implementation
,
math
2500
x427
611F
New Year and Cleaning
binary search
,
implementation
2500
x454
1773I
Interactive Factorial Guessing
brute force
,
games
,
implementation
,
interactive
2500
x458
1468I
Plane Tiling
geometry
,
implementation
,
math
2500
x470
1310B
Double Elimination
dp
,
implementation
2500
x488
1717F
Madoka and The First Session
constructive algorithms
,
flows
,
graph matchings
,
graphs
,
implementation
2500
x512
1186E
Vus the Cossack and a Field
divide and conquer
,
implementation
,
math
2500
x555
1787F
Inverse Transformation
constructive algorithms
,
implementation
,
math
2500
x632
1945G
Cook and Porridge
binary search
,
constructive algorithms
,
data structures
,
implementation
2500
x634
383B
Volcanoes
binary search
,
implementation
,
sortings
,
two pointers
2500
x653
1771E
Hossam and a Letter
brute force
,
dp
,
implementation
,
two pointers
2500
x662
976D
Degree Set
constructive algorithms
,
graphs
,
implementation
2500
x669
1809F
Traveling in Berland
binary search
,
data structures
,
graphs
,
greedy
,
implementation
2500
x711
15D
Map
data structures
,
implementation
,
sortings
2500
x718
501E
Misha and Palindrome Degree
binary search
,
combinatorics
,
implementation
2500
x719
1789E
Serval and Music Game
brute force
,
dp
,
implementation
,
math
,
number theory
2500
x768
1891E
Brukhovich and Exams
brute force
,
greedy
,
implementation
,
math
,
sortings
2500
x775
1918F
Caterpillar on a Tree
dfs and similar
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
2500
x780
1788F
XOR, Tree, and Queries
bitmasks
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
trees
2500
x796
1904E
Tree Queries
data structures
,
dfs and similar
,
graphs
,
implementation
,
trees
2500
x830
555D
Case of a Top Secret
binary search
,
implementation
,
math
2500
x857
1574E
Coloring
combinatorics
,
constructive algorithms
,
implementation
,
math
2500
x873
1701F
Points
combinatorics
,
data structures
,
implementation
,
math
,
matrices
2500
x890
1374E2
Reading Books (hard version)
data structures
,
greedy
,
implementation
,
sortings
,
ternary search
,
two pointers
2500
x902
1539E
Game with Cards
binary search
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
2500
x925
1517E
Group Photo
binary search
,
data structures
,
implementation
,
two pointers
2500
x946
407C
Curious Array
brute force
,
combinatorics
,
implementation
,
math
2500
x955
1239B
The World Is Just a Programming Task (Hard Version)
implementation
2500
x970
1658E
Gojou and Matrix Game
data structures
,
dp
,
games
,
hashing
,
implementation
,
math
,
number theory
,
sortings
2500
x1022
706E
Working routine
data structures
,
implementation
2500
x1117
1307E
Cow and Treats
binary search
,
combinatorics
,
dp
,
greedy
,
implementation
,
math
2500
x1119
923D
Picking Strings
constructive algorithms
,
implementation
,
strings
2500
x1156
1137C
Museums Tour
dp
,
graphs
,
implementation
2500
x1159
1313D
Happy New Year
bitmasks
,
dp
,
implementation
2500
x1163
1492E
Almost Fault-Tolerant Database
brute force
,
constructive algorithms
,
dfs and similar
,
greedy
,
implementation
2500
x1165
1188A2
Add on a Tree: Revolution
constructive algorithms
,
dfs and similar
,
implementation
,
trees
2500
x1165
1956E1
Nene vs. Monsters (Easy Version)
brute force
,
implementation
,
math
2500
x1245
1301E
Nanosoft
binary search
,
data structures
,
dp
,
implementation
2500
x1271
1845E
Boxes and Balls
dp
,
implementation
,
math
2500
x1274
734F
Anton and School
bitmasks
,
constructive algorithms
,
implementation
,
math
2500
x1279
1381C
Mastermind
constructive algorithms
,
graph matchings
,
greedy
,
implementation
,
sortings
,
two pointers
2500
x1390
1665E
MinimizOR
bitmasks
,
brute force
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
two pointers
2500
x1429
551E
GukiZ and GukiZiana
binary search
,
data structures
,
implementation
2500
x1651
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