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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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Problems
#
Name
1948E
Clique Partition
brute force
,
constructive algorithms
,
graphs
,
greedy
,
implementation
2100
x2580
1942D
Learning to Paint
binary search
,
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
sortings
2100
x2390
1938J
There and Back Again
2100
x1107
1934D1
XOR Break --- Solo Version
bitmasks
,
constructive algorithms
,
greedy
2100
x3051
1933F
Turtle Mission: Robot and the Earthquake
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2187
1930D2
Sum over all Substrings (Hard Version)
bitmasks
,
divide and conquer
,
dp
,
dsu
,
greedy
,
implementation
,
strings
2100
x2351
1924B
Space Harbour
data structures
,
implementation
,
math
,
sortings
2100
x2267
1920E
Counting Binary Strings
combinatorics
,
dp
,
math
2100
x2347
1919D
01 Tree
constructive algorithms
,
data structures
,
dsu
,
greedy
,
sortings
,
trees
2100
x3587
1914G1
Light Bulbs (Easy Version)
brute force
,
combinatorics
,
dfs and similar
,
dp
,
dsu
,
graphs
,
math
,
trees
2100
x1664
1913D
Array Collapse
data structures
,
divide and conquer
,
dp
,
trees
2100
x2691
1912B
Blueprint for Seating
combinatorics
,
divide and conquer
,
math
2100
x918
1910E
Maximum Sum Subarrays
*special problem
,
dp
2100
x167
1906J
Count BFS Graph
combinatorics
,
dp
2100
x629
1906F
Maximize The Value
data structures
,
sortings
2100
x930
1900E
Transitive Graph
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
2100
x1794
1896E
Permutation Sorting
data structures
,
sortings
2100
x2003
1886D
Monocarp and the Set
combinatorics
,
data structures
,
math
2100
x3313
1884D
Counting Rhyme
dp
,
math
,
number theory
2100
x2797
1876C
Autosynthesis
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
sortings
2100
x2133
1868B2
Candy Party (Hard Version)
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
implementation
,
math
2100
x2269
1866H
Happy Sets
combinatorics
2100
x1520
1866G
Grouped Carriages
binary search
,
data structures
,
dp
,
flows
,
greedy
2100
x1502
1864E
Guess Game
bitmasks
,
data structures
,
games
,
math
,
probabilities
,
sortings
,
strings
,
trees
2100
x2463
1863E
Speedrun
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
sortings
,
two pointers
2100
x2606
1856D
More Wrong
divide and conquer
,
interactive
2100
x3076
1839D
Ball Sorting
data structures
,
dp
,
sortings
2100
x2172
1838D
Bracket Walk
data structures
,
greedy
,
strings
2100
x3076
1832D1
Red-Blue Operations (Easy Version)
binary search
,
greedy
,
implementation
,
math
2100
x2788
1821E
Rearrange Brackets
brute force
,
dp
,
greedy
,
sortings
,
strings
2100
x2240
1811G1
Vlad and the Nice Paths (easy version)
combinatorics
,
dp
,
math
2100
x1906
1811F
Is It Flower?
dfs and similar
,
graphs
,
implementation
2100
x1724
1810E
Monsters
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
2100
x2962
1808D
Petya, Petya, Petr, and Palindromes
binary search
,
brute force
,
data structures
,
two pointers
2100
x2162
1801D
The way home
binary search
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x2037
1799D2
Hot Start Up (hard version)
data structures
,
dp
2100
x2269
1790F
Timofey and Black-White Tree
brute force
,
dfs and similar
,
divide and conquer
,
graphs
,
greedy
,
math
,
shortest paths
,
trees
2100
x3148
1787E
The Harmonization of XOR
bitmasks
,
constructive algorithms
,
greedy
,
math
2100
x2175
1778D
Flexible String Revisit
combinatorics
,
dp
,
math
,
probabilities
2100
x2549
1776G
Another Wine Tasting Event
combinatorics
,
constructive algorithms
,
math
,
strings
2100
x1949
1775E
The Human Equation
greedy
,
implementation
2100
x3023
1771D
Hossam and (sub-)palindromic tree
brute force
,
data structures
,
dfs and similar
,
dp
,
strings
,
trees
2100
x2595
1767C
Count Binary Strings
data structures
,
dp
2100
x2498
1762D
GCD Queries
constructive algorithms
,
interactive
,
number theory
2100
x3283
1761D
Carry Bit
combinatorics
,
math
2100
x2324
1748D
ConstructOR
bitmasks
,
chinese remainder theorem
,
combinatorics
,
constructive algorithms
,
math
,
number theory
2100
x2659
1734E
Rectangular Congruence
constructive algorithms
,
number theory
2100
x2761
1732C2
Sheikh (Hard Version)
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
two pointers
2100
x2456
1729G
Cut Substrings
combinatorics
,
dp
,
hashing
,
strings
,
two pointers
2100
x2058
1725F
Field Photography
bitmasks
,
data structures
,
sortings
2100
x938
1710B
Rain
binary search
,
brute force
,
data structures
,
geometry
,
greedy
,
implementation
,
math
2100
x2350
1684E
MEX vs DIFF
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2100
x3033
1671E
Preorder
combinatorics
,
divide and conquer
,
dp
,
dsu
,
hashing
,
sortings
,
trees
2100
x2645
1667B
Optimal Partition
data structures
,
dp
2100
x3468
1666J
Job Lookup
constructive algorithms
,
dp
,
shortest paths
,
trees
2100
x1292
1660F2
Promising String (hard version)
data structures
,
implementation
,
math
,
strings
2100
x2592
1654D
Potion Brewing Class
dfs and similar
,
math
,
number theory
,
trees
2100
x2776
1650G
Counting Shortcuts
data structures
,
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2332
1637E
Best Pair
binary search
,
brute force
,
implementation
2100
x3183
1628D1
Game on Sum (Easy Version)
combinatorics
,
dp
,
games
,
math
2100
x3015
1626D
Martial Arts Tournament
binary search
,
brute force
,
greedy
,
math
2100
x3786
1621D
The Winter Hike
constructive algorithms
,
greedy
,
math
2100
x3961
1614D1
Divan and Kostomuksha (easy version)
dp
,
number theory
2100
x3650
1606E
Arena
combinatorics
,
dp
,
math
2100
x3336
1605D
Treelabeling
bitmasks
,
constructive algorithms
,
dfs and similar
,
games
,
greedy
,
implementation
,
trees
2100
x2837
1599H
Hidden Fortress
interactive
,
math
2100
x1007
1598E
Staircases
brute force
,
combinatorics
,
data structures
,
dfs and similar
,
dp
,
implementation
,
math
2100
x2237
1593F
Red-Black Number
dfs and similar
,
dp
,
implementation
,
math
,
meet-in-the-middle
2100
x2328
1575L
Longest Array Deconstruction
data structures
,
divide and conquer
,
dp
,
sortings
2100
x1261
1560F2
Nearest Beautiful Number (hard version)
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
2100
x4192
1555E
Boring Segments
data structures
,
sortings
,
trees
,
two pointers
2100
x3859
1553E
Permutation Shift
brute force
,
combinatorics
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
math
2100
x3236
1551D2
Domino (hard version)
constructive algorithms
,
implementation
,
math
2100
x2653
1547G
How Many Paths?
dfs and similar
,
dp
,
graphs
,
trees
2100
x2849
1538G
Gift Set
binary search
,
greedy
,
math
,
ternary search
2100
x4354
1538E
Funny Substrings
data structures
,
hashing
,
implementation
,
matrices
,
strings
2100
x2802
1530E
Minimax
constructive algorithms
,
greedy
,
strings
2100
x2894
1525E
Assimilation IV
combinatorics
,
dp
,
math
,
probabilities
,
two pointers
2100
x1963
1516D
Cut
binary search
,
data structures
,
dp
,
graphs
,
number theory
,
two pointers
2100
x4089
1511E
Colorings and Dominoes
combinatorics
,
dp
,
greedy
,
math
2100
x2459
1510G
Guide
2100
x1257
1510D
Digits
dp
,
math
,
number theory
2100
x1798
1499D
The Number of Pairs
dp
,
math
,
number theory
2100
x5452
1493D
GCD of an Array
brute force
,
data structures
,
hashing
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2100
x4736
1486D
Max Median
binary search
,
data structures
,
dp
2100
x6712
1482E
Skyline Photo
data structures
,
divide and conquer
,
dp
2100
x2936
1479B2
Painting the Array II
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
2100
x3903
1472G
Moving to the Capital
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x4397
1472F
New Year's Puzzle
brute force
,
dp
,
graph matchings
,
greedy
,
sortings
2100
x2933
1466F
Euclid's nightmare
bitmasks
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
2100
x2793
1454F
Array Partition
binary search
,
data structures
,
greedy
,
two pointers
2100
x3794
1450C1
Errich-Tac-Toe (Easy Version)
constructive algorithms
,
math
2100
x5304
1446C
Xor Tree
binary search
,
bitmasks
,
data structures
,
divide and conquer
,
dp
,
trees
2100
x3388
1433G
Reducing Delivery Cost
brute force
,
graphs
,
shortest paths
2100
x4104
1433F
Zero Remainder Sum
dp
2100
x5829
1431G
Number Deletion Game
*special problem
,
dp
,
games
,
greedy
2100
x137
1431F
Neural Network Problem
*special problem
,
binary search
,
greedy
2100
x152
1420C2
Pokémon Army (hard version)
data structures
,
divide and conquer
,
dp
,
greedy
,
implementation
2100
x4493
1419E
Decryption
constructive algorithms
,
implementation
,
math
,
number theory
2100
x3137
1418D
Trash Problem
data structures
,
implementation
2100
x4176
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