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Problems
#
Name
1852A
Ntarsis' Set
binary search
,
math
,
number theory
1800
x7570
1851G
Vlad and the Mountains
binary search
,
data structures
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
,
two pointers
2000
x2931
1851F
Lisa and the Martians
bitmasks
,
greedy
,
math
,
strings
,
trees
1800
x5305
1851E
Nastya and Potions
dfs and similar
,
dp
,
graphs
,
sortings
1500
x9449
1851D
Prefix Permutation Sums
implementation
,
math
1300
x14364
1851C
Tiles Comeback
greedy
1000
x22256
1851B
Parity Sort
greedy
,
sortings
,
two pointers
800
x28083
1851A
Escalator Conversations
brute force
,
constructive algorithms
,
math
800
x28632
1850H
The Third Letter
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
1700
x7512
1850G
The Morning Star
combinatorics
,
data structures
,
geometry
,
implementation
,
math
,
sortings
1500
x11227
1850F
We Were Both Children
brute force
,
implementation
,
math
,
number theory
1300
x17218
1850E
Cardboard for Pictures
binary search
,
geometry
,
implementation
,
math
1100
x20876
1850D
Balanced Round
brute force
,
greedy
,
implementation
,
sortings
900
x32431
1850C
Word on the Paper
implementation
,
strings
800
x41172
1850B
Ten Words of Wisdom
implementation
,
sortings
800
x40463
1850A
To My Critics
implementation
,
sortings
800
x51207
1849F
XOR Partition
binary search
,
bitmasks
,
data structures
,
divide and conquer
,
greedy
,
trees
2700
x654
1849E
Max to the Right of Min
binary search
,
data structures
,
divide and conquer
,
dp
,
dsu
,
two pointers
2300
x1508
1849D
Array Painting
constructive algorithms
,
greedy
,
two pointers
1700
x7772
1849C
Binary String Copying
binary search
,
brute force
,
data structures
,
hashing
,
strings
1600
x9851
1849B
Monsters
greedy
,
math
,
sortings
1000
x22722
1849A
Morning Sandwich
implementation
,
math
800
x27058
1848F
Vika and Wiki
binary search
,
bitmasks
,
combinatorics
,
divide and conquer
,
dp
,
math
2400
x1450
1848E
Vika and Stone Skipping
brute force
,
implementation
,
math
,
number theory
2600
x741
1848D
Vika and Bonuses
binary search
,
brute force
,
math
,
ternary search
2200
x2515
1848C
Vika and Price Tags
math
,
number theory
1800
x5960
1848B
Vika and the Bridge
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1200
x13379
1848A
Vika and Her Friends
games
,
math
900
x16227
1847F
The Boss's Identity
binary search
,
bitmasks
,
data structures
,
dfs and similar
,
greedy
,
math
,
sortings
2500
x854
1847E
Triangle Platinum?
brute force
,
combinatorics
,
implementation
,
interactive
,
math
,
probabilities
2900
x317
1847D
Professor Higashikata
data structures
,
dsu
,
greedy
,
implementation
,
strings
1900
x3601
1847C
Vampiric Powers, anyone?
bitmasks
,
brute force
,
dp
,
greedy
1400
x12218
1847B
Hamon Odyssey
bitmasks
,
greedy
,
two pointers
1000
x19098
1847A
The Man who became a God
greedy
,
sortings
800
x21675
1846G
Rudolf and CodeVid-23
bitmasks
,
dp
,
graphs
,
greedy
,
shortest paths
1900
x4056
1846F
Rudolph and Mimic
constructive algorithms
,
implementation
,
interactive
1800
x2877
1846E2
Rudolf and Snowflakes (hard version)
binary search
,
brute force
,
implementation
,
math
1800
x6595
1846E1
Rudolf and Snowflakes (simple version)
brute force
,
implementation
,
math
1300
x15379
1846D
Rudolph and Christmas Tree
constructive algorithms
,
geometry
,
math
1200
x18344
1846C
Rudolf and the Another Competition
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1200
x17951
1846B
Rudolph and Tic-Tac-Toe
brute force
,
implementation
,
strings
800
x26095
1846A
Rudolph and Cut the Rope
implementation
,
math
800
x31394
1845F
Swimmers in the Pool
dp
,
fft
,
math
,
number theory
2800
x354
1845E
Boxes and Balls
dp
,
implementation
,
math
2500
x1268
1845D
Rating System
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
two pointers
1800
x7326
1845C
Strong Password
binary search
,
dp
,
greedy
,
strings
1400
x13333
1845B
Come Together
geometry
,
implementation
,
math
900
x20884
1845A
Forbidden Integer
constructive algorithms
,
implementation
,
math
,
number theory
800
x24606
1844H
Multiple of Three Cycles
combinatorics
,
data structures
,
dp
,
dsu
,
math
3400
x131
1844G
Tree Weights
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
implementation
,
math
,
matrices
,
number theory
,
trees
3000
x644
1844F2
Min Cost Permutation (Hard Version)
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
,
sortings
2800
x368
1844F1
Min Cost Permutation (Easy Version)
brute force
,
constructive algorithms
,
greedy
,
math
2600
x737
1844E
Great Grids
2-sat
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2400
x1688
1844D
Row Major
constructive algorithms
,
greedy
,
math
,
number theory
,
strings
1400
x11621
1844C
Particles
dp
,
greedy
,
implementation
,
math
1300
x14826
1844B
Permutations & Primes
constructive algorithms
,
math
1000
x17441
1844A
Subtraction Game
constructive algorithms
,
games
800
x23870
1843F2
Omsk Metro (hard version)
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
math
,
trees
2300
x1471
1843F1
Omsk Metro (simple version)
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
1800
x4979
1843E
Tracking Segments
binary search
,
brute force
,
data structures
,
two pointers
1600
x10983
1843D
Apple Tree
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
1200
x17043
1843C
Sum in Binary Tree
bitmasks
,
combinatorics
,
math
,
trees
800
x31105
1843B
Long Long
greedy
,
math
,
two pointers
800
x28048
1843A
Sasha and Array Coloring
greedy
,
sortings
,
two pointers
800
x32988
1842I
Tenzing and Necklace
divide and conquer
,
dp
,
greedy
3500
x108
1842H
Tenzing and Random Real Numbers
bitmasks
,
dp
,
graphs
,
math
,
probabilities
3000
x561
1842G
Tenzing and Random Operations
combinatorics
,
dp
,
math
,
probabilities
2800
x927
1842F
Tenzing and Tree
dfs and similar
,
greedy
,
shortest paths
,
sortings
,
trees
2500
x1245
1842E
Tenzing and Triangle
data structures
,
dp
,
geometry
,
greedy
,
math
2300
x1538
1842D
Tenzing and His Animal Friends
constructive algorithms
,
graphs
,
greedy
1900
x3921
1842C
Tenzing and Balls
dp
1500
x11693
1842B
Tenzing and Books
bitmasks
,
greedy
,
math
1100
x15662
1842A
Tenzing and Tsondu
games
,
math
800
x19462
1841F
Monocarp and a Strategic Game
geometry
,
sortings
,
two pointers
2700
x471
1841E
Fill the Matrix
data structures
,
greedy
,
math
2200
x1883
1841D
Pairs of Segments
data structures
,
greedy
,
sortings
,
two pointers
2000
x4133
1841C
Ranom Numbers
brute force
,
dp
,
greedy
,
math
,
strings
1800
x7313
1841B
Keep it Beautiful
implementation
1000
x20565
1841A
Game with Board
constructive algorithms
,
games
800
x24228
1840G2
In Search of Truth (Hard Version)
constructive algorithms
,
interactive
,
math
,
meet-in-the-middle
,
probabilities
2500
x900
1840G1
In Search of Truth (Easy Version)
constructive algorithms
,
interactive
,
math
,
meet-in-the-middle
,
probabilities
2200
x2234
1840F
Railguns
brute force
,
dfs and similar
,
dp
,
graphs
2200
x1704
1840E
Character Blocking
data structures
,
hashing
,
implementation
1600
x7548
1840D
Wooden Toy Festival
binary search
,
greedy
,
sortings
1400
x12861
1840C
Ski Resort
combinatorics
,
math
,
two pointers
1000
x24634
1840B
Binary Cafe
bitmasks
,
combinatorics
,
math
1100
x21521
1840A
Cipher Shifer
implementation
,
strings
,
two pointers
800
x32605
1839E
Decreasing Game
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
interactive
2400
x1160
1839D
Ball Sorting
data structures
,
dp
,
sortings
2100
x2177
1839C
Insert Zero and Invert Prefix
constructive algorithms
1300
x11372
1839B
Lamps
greedy
,
sortings
1100
x14488
1839A
The Good Array
greedy
,
implementation
,
math
800
x17099
1838F
Stuck Conveyor
binary search
,
constructive algorithms
,
interactive
3000
x302
1838E
Count Supersequences
combinatorics
,
dp
,
math
2500
x1372
1838D
Bracket Walk
data structures
,
greedy
,
strings
2100
x3080
1838C
No Prime Differences
constructive algorithms
,
math
,
number theory
1400
x13434
1838B
Minimize Permutation Subarrays
constructive algorithms
,
math
1100
x15828
1838A
Blackboard List
constructive algorithms
,
math
800
x21058
1837F
Editorial for Two
binary search
,
data structures
,
greedy
,
implementation
2400
x2070
1837E
Playoff Fixing
combinatorics
,
trees
2200
x2101
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