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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
27:07:14
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Difficulty:
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math
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
1100F
Ivan and Burgers
data structures
,
divide and conquer
,
greedy
,
math
2500
x2028
305B
Continued Fractions
brute force
,
implementation
,
math
1700
x2026
958D1
Hyperspace Jump (easy)
expression parsing
,
math
1400
x2020
739E
Gosha is hunting
brute force
,
data structures
,
dp
,
flows
,
math
,
probabilities
,
sortings
3000
x2020
1712E1
LCM Sum (easy version)
binary search
,
brute force
,
combinatorics
,
math
,
number theory
,
two pointers
2300
x2019
486E
LIS of Sequence
data structures
,
dp
,
greedy
,
hashing
,
math
2200
x2011
1270G
Subset with Zero Sum
constructive algorithms
,
dfs and similar
,
graphs
,
math
2700
x2007
238A
Not Wool Sequences
constructive algorithms
,
math
1300
x2003
167A
Wizards and Trolleybuses
implementation
,
math
1600
x2002
1834E
MEX of LCM
binary search
,
data structures
,
implementation
,
math
,
number theory
2300
x2000
601B
Lipshitz Sequence
data structures
,
math
2100
x1998
571A
Lengthening Sticks
combinatorics
,
implementation
,
math
2100
x1995
1783E
Game of the Year
brute force
,
data structures
,
math
,
number theory
2300
x1993
1166D
Cute Sequences
binary search
,
brute force
,
greedy
,
math
2200
x1992
1500B
Two chandeliers
binary search
,
brute force
,
chinese remainder theorem
,
math
,
number theory
2200
x1975
1619F
Let's Play the Hat?
brute force
,
constructive algorithms
,
greedy
,
math
2000
x1974
117A
Elevator
implementation
,
math
1300
x1969
76D
Plus and xor
dp
,
greedy
,
math
1700
x1969
1348E
Phoenix and Berries
brute force
,
dp
,
greedy
,
math
2400
x1968
1654E
Arithmetic Operations
brute force
,
data structures
,
graphs
,
math
2300
x1967
1139D
Steps to One
dp
,
math
,
number theory
,
probabilities
2300
x1961
1603C
Extreme Extension
dp
,
greedy
,
math
,
number theory
2300
x1960
1657E
Star MST
combinatorics
,
dp
,
graph matchings
,
math
2200
x1954
1628D2
Game on Sum (Hard Version)
combinatorics
,
dp
,
games
,
math
2400
x1953
906D
Power Tower
chinese remainder theorem
,
math
,
number theory
2700
x1952
1625D
Binary Spiders
bitmasks
,
data structures
,
implementation
,
math
,
sortings
,
trees
2300
x1946
364D
Ghd
brute force
,
math
,
probabilities
2900
x1940
1346A
Color Revolution
*special problem
,
math
1000
x1935
1179C
Serge and Dining Room
binary search
,
data structures
,
graph matchings
,
greedy
,
implementation
,
math
,
trees
2200
x1932
1543D2
RPD and Rap Sheet (Hard Version)
brute force
,
constructive algorithms
,
interactive
,
math
2200
x1929
1763D
Valid Bitonic Permutations
combinatorics
,
dp
,
implementation
,
math
,
number theory
2200
x1926
1776G
Another Wine Tasting Event
combinatorics
,
constructive algorithms
,
math
,
strings
2100
x1924
255D
Mr. Bender and Square
binary search
,
implementation
,
math
1800
x1919
1392F
Omkar and Landslide
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
2400
x1918
1525E
Assimilation IV
combinatorics
,
dp
,
math
,
probabilities
,
two pointers
2100
x1917
1375F
Integer Game
constructive algorithms
,
games
,
interactive
,
math
2600
x1914
959F
Mahmoud and Ehab and yet another xor task
bitmasks
,
dp
,
math
,
matrices
2400
x1912
662C
Binary Table
bitmasks
,
brute force
,
divide and conquer
,
dp
,
fft
,
math
2600
x1909
1413E
Solo mid Oracle
greedy
,
math
,
ternary search
2100
x1898
134B
Pairs of Numbers
brute force
,
dfs and similar
,
math
,
number theory
1900
x1895
1089F
Fractions
math
1900
x1893
678E
Another Sith Tournament
bitmasks
,
dp
,
math
,
probabilities
2200
x1889
1769A
Узкая дорога
*special problem
,
math
800
x1886
1795E
Explosions?
binary search
,
data structures
,
dp
,
greedy
,
math
2200
x1881
356B
Xenia and Hamming
implementation
,
math
1900
x1881
1811G1
Vlad and the Nice Paths (easy version)
combinatorics
,
dp
,
math
2100
x1874
145C
Lucky Subsequence
combinatorics
,
dp
,
math
2100
x1869
933B
A Determined Cleanup
math
2000
x1868
975D
Ghosts
geometry
,
math
2000
x1862
1027E
Inverse Coloring
combinatorics
,
dp
,
math
2100
x1850
1055C
Lucky Days
math
,
number theory
1900
x1839
1841E
Fill the Matrix
data structures
,
greedy
,
math
2200
x1827
919E
Congruence Equation
chinese remainder theorem
,
math
,
number theory
2100
x1810
1527D
MEX Tree
combinatorics
,
dfs and similar
,
implementation
,
math
,
trees
2400
x1808
603C
Lieges of Legendre
games
,
math
2200
x1802
1114F
Please, another Queries on Array?
bitmasks
,
data structures
,
divide and conquer
,
math
,
number theory
2400
x1788
520E
Pluses everywhere
combinatorics
,
dp
,
math
,
number theory
2200
x1786
549H
Degenerate Matrix
binary search
,
math
2100
x1783
1510D
Digits
dp
,
math
,
number theory
2100
x1780
65A
Harry Potter and Three Spells
implementation
,
math
1800
x1778
1252K
Addition Robot
data structures
,
math
,
matrices
2100
x1774
1550D
Excellent Arrays
binary search
,
combinatorics
,
constructive algorithms
,
implementation
,
math
,
sortings
,
two pointers
2300
x1772
509E
Pretty Song
math
,
strings
2000
x1767
24D
Broken robot
dp
,
math
,
probabilities
2400
x1766
1832D2
Red-Blue Operations (Hard Version)
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
2400
x1764
1768E
Partial Sorting
combinatorics
,
math
,
number theory
2300
x1759
1183F
Topforces Strikes Back
brute force
,
math
,
sortings
2100
x1755
258C
Little Elephant and LCM
binary search
,
combinatorics
,
dp
,
math
2000
x1746
1548C
The Three Little Pigs
combinatorics
,
dp
,
fft
,
math
2500
x1725
910C
Minimum Sum
constructive algorithms
,
greedy
,
math
1700
x1713
551D
GukiZ and Binary Operations
combinatorics
,
implementation
,
math
,
matrices
,
number theory
2100
x1713
75D
Big Maximum Sum
data structures
,
dp
,
greedy
,
implementation
,
math
,
trees
2000
x1711
746E
Numbers Exchange
greedy
,
implementation
,
math
1900
x1703
1903E
Geo Game
greedy
,
interactive
,
math
2000
x1702
1468H
K and Medians
constructive algorithms
,
greedy
,
math
2200
x1695
1267K
Key Storage
combinatorics
,
math
2100
x1695
1617D2
Too Many Impostors (hard version)
constructive algorithms
,
implementation
,
interactive
,
math
2400
x1687
590B
Chip 'n Dale Rescue Rangers
binary search
,
geometry
,
math
2100
x1687
1748E
Yet Another Array Counting Problem
binary search
,
data structures
,
divide and conquer
,
dp
,
flows
,
math
,
trees
2300
x1678
995C
Leaving the Bar
brute force
,
data structures
,
geometry
,
greedy
,
math
,
sortings
2300
x1673
979D
Kuro and GCD and XOR and SUM
binary search
,
bitmasks
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
number theory
,
strings
,
trees
2200
x1671
1158C
Permutation recovery
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
math
,
sortings
2100
x1667
1042E
Vasya and Magic Matrix
dp
,
math
,
probabilities
2300
x1664
1278F
Cards
combinatorics
,
dp
,
math
,
number theory
,
probabilities
2600
x1663
916B
Jamie and Binary Sequence (changed after round)
bitmasks
,
greedy
,
math
2000
x1663
1763E
Node Pairs
dp
,
graphs
,
math
,
number theory
2200
x1662
920G
List Of Integers
binary search
,
bitmasks
,
brute force
,
combinatorics
,
math
,
number theory
2200
x1658
1148E
Earth Wind and Fire
constructive algorithms
,
greedy
,
math
,
sortings
,
two pointers
2300
x1646
76E
Points
implementation
,
math
1700
x1646
1706D2
Chopping Carrots (Hard Version)
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2400
x1639
1859E
Maximum Monogonosity
brute force
,
dp
,
math
2500
x1637
1344C
Quantifier Question
dfs and similar
,
dp
,
graphs
,
math
2600
x1633
362C
Insertion Sort
data structures
,
dp
,
implementation
,
math
1900
x1632
49C
Disposition
constructive algorithms
,
math
1700
x1632
1728E
Red-Black Pepper
brute force
,
data structures
,
greedy
,
math
,
number theory
2300
x1630
1217E
Sum Queries?
data structures
,
greedy
,
implementation
,
math
2300
x1630
575H
Bots
combinatorics
,
dp
,
math
,
number theory
1800
x1620
81C
Average Score
greedy
,
math
,
sortings
1700
x1619
1610E
AmShZ and G.O.A.T.
binary search
,
brute force
,
greedy
,
implementation
,
math
2300
x1617
662D
International Olympiad
constructive algorithms
,
greedy
,
implementation
,
math
2000
x1614
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