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Problems
#
Name
93C
Azembler
brute force
,
implementation
2500
x410
1181E1
A Story of One Country (Easy)
brute force
,
divide and conquer
,
sortings
2500
x453
1773I
Interactive Factorial Guessing
brute force
,
games
,
implementation
,
interactive
2500
x458
161E
Polycarpus the Safecracker
brute force
,
dp
2500
x462
311C
Fetch the Treasure
brute force
,
data structures
,
graphs
,
shortest paths
2500
x475
1834F
Typewriter
brute force
,
math
2500
x488
912C
Perun, Ult!
brute force
,
greedy
,
sortings
2500
x509
1709F
Multiset of Strings
bitmasks
,
brute force
,
dp
,
fft
,
flows
,
graphs
,
math
,
meet-in-the-middle
,
trees
2500
x535
1731F
Function Sum
brute force
,
combinatorics
,
dp
,
fft
,
math
2500
x660
1771E
Hossam and a Letter
brute force
,
dp
,
implementation
,
two pointers
2500
x662
1789E
Serval and Music Game
brute force
,
dp
,
implementation
,
math
,
number theory
2500
x766
1891E
Brukhovich and Exams
brute force
,
greedy
,
implementation
,
math
,
sortings
2500
x775
1017F
The Neutral Zone
brute force
,
math
2500
x802
1814D
Balancing Weapons
binary search
,
brute force
,
data structures
,
math
,
two pointers
2500
x822
1767E
Algebra Flash
bitmasks
,
brute force
,
dp
,
graphs
,
math
,
meet-in-the-middle
,
trees
2500
x842
687D
Dividing Kingdom II
brute force
,
data structures
,
dsu
,
graphs
,
sortings
2500
x854
778C
Peterson Polyglot
brute force
,
dfs and similar
,
dsu
,
hashing
,
strings
,
trees
2500
x865
1920F1
Smooth Sailing (Easy Version)
binary search
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
shortest paths
2500
x884
1835B
Lottery
binary search
,
brute force
,
greedy
,
math
,
two pointers
2500
x904
1661E
Narrow Components
brute force
,
data structures
,
dp
,
dsu
,
math
,
trees
2500
x911
1764F
Doremy's Experimental Tree
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
sortings
,
trees
2500
x921
407C
Curious Array
brute force
,
combinatorics
,
implementation
,
math
2500
x955
1625E1
Cats on the Upgrade (easy version)
brute force
,
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
graphs
,
trees
2500
x977
1701E
Text Editor
brute force
,
dp
,
greedy
,
strings
2500
x1059
333E
Summer Earnings
binary search
,
bitmasks
,
brute force
,
geometry
,
sortings
2500
x1070
1689E
ANDfinity
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2500
x1150
1492E
Almost Fault-Tolerant Database
brute force
,
constructive algorithms
,
dfs and similar
,
greedy
,
implementation
2500
x1165
1712E2
LCM Sum (hard version)
brute force
,
data structures
,
math
,
number theory
,
two pointers
2500
x1183
1823E
Removing Graph
brute force
,
dp
,
games
,
graphs
,
math
2500
x1199
1513F
Swapping Problem
brute force
,
constructive algorithms
,
data structures
,
sortings
2500
x1201
1956E1
Nene vs. Monsters (Easy Version)
brute force
,
implementation
,
math
2500
x1223
1858E1
Rollbacks (Easy Version)
brute force
,
data structures
,
dfs and similar
,
trees
2500
x1251
804D
Expected diameter of a tree
binary search
,
brute force
,
dfs and similar
,
dp
,
sortings
,
trees
2500
x1257
757E
Bash Plays with Functions
brute force
,
combinatorics
,
dp
,
number theory
2500
x1267
1710C
XOR Triangle
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
greedy
,
math
2500
x1277
1438E
Yurii Can Do Everything
binary search
,
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
two pointers
2500
x1292
1470C
Strange Shuffle
binary search
,
brute force
,
constructive algorithms
,
interactive
2500
x1306
1687C
Sanae and Giant Robot
binary search
,
brute force
,
data structures
,
dsu
,
greedy
,
sortings
2500
x1339
1508C
Complete the MST
bitmasks
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
2500
x1425
1665E
MinimizOR
bitmasks
,
brute force
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
two pointers
2500
x1426
1550E
Stringforces
binary search
,
bitmasks
,
brute force
,
dp
,
strings
,
two pointers
2500
x1441
1452E
Two Editorials
brute force
,
dp
,
greedy
,
sortings
,
two pointers
2500
x1486
1175F
The Number of Subpermutations
brute force
,
data structures
,
divide and conquer
,
hashing
,
math
2500
x1565
1859E
Maximum Monogonosity
brute force
,
dp
,
math
2500
x1669
1572B
Xor of 3
brute force
,
constructive algorithms
,
greedy
,
two pointers
2500
x1748
528D
Fuzzy Search
bitmasks
,
brute force
,
fft
2500
x2070
348C
Subset Sums
brute force
,
data structures
2500
x2097
1559D2
Mocha and Diana (Hard Version)
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
,
two pointers
2500
x2537
97A
Domino
brute force
,
implementation
2400
x250
175D
Plane of Tanks: Duel
brute force
,
dp
,
math
,
probabilities
2400
x289
335D
Rectangles and Square
brute force
,
dp
2400
x304
1970A2
Balanced Unshuffle (Medium)
brute force
,
constructive algorithms
,
trees
2400
x329
293C
Cube Problem
brute force
,
math
,
number theory
2400
x554
1765L
Project Manager
brute force
,
data structures
,
implementation
2400
x563
758F
Geometrical Progression
brute force
,
math
,
number theory
2400
x620
1163E
Magical Permutation
bitmasks
,
brute force
,
constructive algorithms
,
data structures
,
graphs
,
math
2400
x647
1866L
Lihmuf Balling
binary search
,
brute force
,
math
2400
x656
200A
Cinema
brute force
,
data structures
2400
x660
1866M
Mighty Rock Tower
brute force
,
combinatorics
,
dp
,
math
,
probabilities
2400
x692
837F
Prefix Sums
binary search
,
brute force
,
combinatorics
,
math
,
matrices
2400
x741
303C
Minimum Modular
brute force
,
graphs
,
math
,
number theory
2400
x854
1007B
Pave the Parallelepiped
bitmasks
,
brute force
,
combinatorics
,
math
,
number theory
2400
x938
1038E
Maximum Matching
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
2400
x954
1882E1
Two Permutations (Easy Version)
brute force
,
constructive algorithms
,
greedy
,
number theory
2400
x961
621D
Rat Kwesh and Cheese
brute force
,
constructive algorithms
,
math
2400
x962
756D
Bacterial Melee
brute force
,
combinatorics
,
dp
,
string suffix structures
2400
x975
1957E
Carousel of Combinations
brute force
,
combinatorics
,
dp
,
math
,
number theory
2400
x1010
744C
Hongcow Buys a Deck of Cards
bitmasks
,
brute force
,
dp
2400
x1011
1774F1
Magician and Pigs (Easy Version)
brute force
,
data structures
,
implementation
2400
x1022
632F
Magic Matrix
brute force
,
divide and conquer
,
graphs
,
matrices
,
trees
2400
x1027
1874B
Jellyfish and Math
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x1069
1619H
Permutation and Queries
brute force
,
data structures
,
divide and conquer
,
two pointers
2400
x1075
1680D
Dog Walking
brute force
,
greedy
,
math
2400
x1117
1697E
Coloring
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
geometry
,
graphs
,
greedy
,
implementation
,
math
2400
x1139
1935E
Distance Learning Courses in MAC
bitmasks
,
brute force
,
data structures
,
greedy
,
math
2400
x1174
906C
Party
bitmasks
,
brute force
,
dp
,
graphs
2400
x1182
1879E
Interactive Game with Coloring
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
,
interactive
,
trees
2400
x1184
1443E
Long Permutation
brute force
,
math
,
two pointers
2400
x1224
1343F
Restore the Permutation by Sorted Segments
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1232
1909E
Multiple Lamps
bitmasks
,
brute force
,
constructive algorithms
,
math
,
number theory
2400
x1253
1943D1
Counting Is Fun (Easy Version)
brute force
,
combinatorics
,
dp
,
math
2400
x1259
1286C1
Madhouse (Easy version)
brute force
,
constructive algorithms
,
interactive
,
math
2400
x1260
1374F
Cyclic Shifts Sorting
brute force
,
constructive algorithms
,
implementation
,
sortings
2400
x1261
1109D
Sasha and Interesting Fact from Graph Theory
brute force
,
combinatorics
,
dp
,
math
,
trees
2400
x1270
1780E
Josuke and Complete Graph
binary search
,
brute force
,
data structures
,
math
,
number theory
2400
x1308
1792E
Divisors and Table
brute force
,
dfs and similar
,
dp
,
number theory
2400
x1309
1598F
RBS
binary search
,
bitmasks
,
brute force
,
data structures
,
dp
2400
x1324
1804E
Routing
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
2400
x1364
1732D2
Balance (Hard version)
brute force
,
data structures
,
number theory
2400
x1366
1606D
Red-Blue Matrix
brute force
,
constructive algorithms
,
implementation
,
sortings
2400
x1402
1455E
Four Points
brute force
,
constructive algorithms
,
flows
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
2400
x1436
1333E
Road to 1600
brute force
,
constructive algorithms
2400
x1476
1826E
Walk the Runway
bitmasks
,
brute force
,
data structures
,
dp
,
graphs
,
implementation
,
sortings
2400
x1506
1887C
Minimum Array
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
two pointers
2400
x1581
1260E
Tournament
brute force
,
dp
,
greedy
2400
x1605
1706D2
Chopping Carrots (Hard Version)
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2400
x1653
710F
String Set Queries
brute force
,
data structures
,
hashing
,
interactive
,
string suffix structures
,
strings
2400
x1676
1582F2
Korney Korneevich and XOR (hard version)
binary search
,
brute force
,
dp
,
greedy
,
two pointers
2400
x1713
1761E
Make It Connected
binary search
,
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
matrices
,
trees
,
two pointers
2400
x1737
1638E
Colorful Operations
brute force
,
data structures
,
implementation
2400
x1795
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03:52:37
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Difficulty:
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brute force
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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