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Problems
#
Name
1970C2
Game on Tree (Medium)
dfs and similar
,
dp
,
games
,
trees
1700
x1220
1969C
Minimizing the Sum
dp
,
implementation
1700
x6179
1955E
Long Inversions
brute force
,
greedy
,
implementation
,
sortings
1700
x7264
1950F
0, 1, 2, Tree!
bitmasks
,
brute force
,
greedy
,
implementation
,
trees
1700
x7706
1948D
Tandem Repeats?
brute force
,
strings
,
two pointers
1700
x8264
1945E
Binary Search
binary search
,
constructive algorithms
,
greedy
1700
x7011
1942C2
Bessie's Birthday Cake (Hard Version)
geometry
,
greedy
,
math
1700
x5517
1936A
Bitwise Operation Wizard
bitmasks
,
constructive algorithms
,
greedy
,
interactive
,
math
1700
x6609
1934C
Find a Mine
binary search
,
constructive algorithms
,
geometry
,
greedy
,
interactive
,
math
1700
x6079
1931F
Chat Screenshots
combinatorics
,
dfs and similar
,
graphs
1700
x6995
1930C
Lexicographically Largest
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
1700
x6445
1916D
Mathematical Problem
brute force
,
constructive algorithms
,
geometry
,
math
1700
x7915
1906M
Triangle Construction
greedy
,
math
1700
x2338
1903D1
Maximum And Queries (easy version)
binary search
,
bitmasks
,
brute force
,
greedy
1700
x5121
1901D
Yet Another Monster Fight
binary search
,
dp
,
greedy
,
implementation
,
math
1700
x6217
1898C
Colorful Grid
constructive algorithms
1700
x4945
1896D
Ones and Twos
binary search
,
data structures
,
divide and conquer
,
math
,
two pointers
1700
x5213
1893B
Neutral Tonality
constructive algorithms
,
greedy
,
sortings
,
two pointers
1700
x8116
1889B
Doremy's Connecting Plan
constructive algorithms
,
greedy
,
math
,
sortings
1700
x6771
1884C
Medium Design
brute force
,
data structures
,
dp
,
greedy
,
sortings
1700
x5488
1883E
Look Back
bitmasks
,
greedy
1700
x7099
1881F
Minimum Maximum Distance
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
1700
x6051
1879D
Sum of XOR Functions
bitmasks
,
combinatorics
,
divide and conquer
,
dp
,
math
1700
x6631
1873H
Mad City
dfs and similar
,
dsu
,
games
,
graphs
,
shortest paths
,
trees
1700
x6624
1868B1
Candy Party (Easy Version)
bitmasks
,
constructive algorithms
,
graphs
,
greedy
,
implementation
,
math
1700
x6481
1864D
Matrix Cascade
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
1700
x6365
1850H
The Third Letter
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
1700
x7553
1849D
Array Painting
constructive algorithms
,
greedy
,
two pointers
1700
x7801
1835A
k-th equality
brute force
,
implementation
,
math
1700
x7467
1833F
Ira and Flamenco
combinatorics
,
constructive algorithms
,
data structures
,
implementation
,
math
,
sortings
,
two pointers
1700
x6745
1829H
Don't Blame Me
bitmasks
,
combinatorics
,
dp
,
math
1700
x7126
1826D
Running Miles
brute force
,
dp
,
greedy
1700
x8638
1822G1
Magic Triples (Easy Version)
brute force
,
data structures
,
math
,
number theory
1700
x6525
1822F
Gardening Friends
brute force
,
dfs and similar
,
dp
,
graphs
,
trees
1700
x5602
1814B
Long Legs
brute force
,
math
1700
x9558
1810D
Climbing the Tree
binary search
,
math
1700
x7119
1807F
Bouncy Ball
brute force
,
dfs and similar
,
implementation
1700
x5912
1799C
Double Lexicographically Minimum
greedy
,
strings
1700
x5476
1798C
Candy Store
greedy
,
math
,
number theory
1700
x7817
1792D
Fixed Prefix Permutations
binary search
,
bitmasks
,
data structures
,
hashing
,
math
,
sortings
1700
x5909
1783C
Yet Another Tournament
binary search
,
greedy
,
sortings
1700
x8847
1779D
Boris and His Amazing Haircut
constructive algorithms
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1700
x7532
1777C
Quiz Master
binary search
,
math
,
number theory
,
sortings
,
two pointers
1700
x7863
1776F
Train Splitting
constructive algorithms
,
graphs
,
greedy
1700
x3248
1772E
Permutation Game
games
1700
x6419
1770C
Koxia and Number Theory
brute force
,
chinese remainder theorem
,
math
,
number theory
1700
x8293
1765D
Watch the Videos
binary search
,
constructive algorithms
,
two pointers
1700
x3923
1760G
SlavicG's Favorite Problem
bitmasks
,
dfs and similar
,
graphs
1700
x6928
1743D
Problem with Random Tests
brute force
,
dp
,
greedy
,
probabilities
1700
x7320
1735D
Meta-set
brute force
,
combinatorics
,
data structures
,
hashing
,
math
1700
x5305
1731D
Valiant's New Map
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x6762
1731C
Even Subarrays
bitmasks
,
brute force
,
hashing
,
math
,
number theory
1700
x8996
1722F
L-shapes
dfs and similar
,
implementation
1700
x6571
1715C
Monoblock
combinatorics
,
data structures
,
implementation
,
math
1700
x8358
1714G
Path Prefixes
binary search
,
data structures
,
dfs and similar
,
trees
1700
x7160
1709D
Rorororobot
binary search
,
data structures
,
greedy
,
math
1700
x8097
1706D1
Chopping Carrots (Easy Version)
binary search
,
brute force
,
constructive algorithms
,
greedy
,
number theory
1700
x6686
1702F
Equate Multisets
constructive algorithms
,
data structures
,
greedy
,
math
,
number theory
1700
x7969
1700C
Helping the Nature
constructive algorithms
,
data structures
,
greedy
1700
x10488
1699C
The Third Problem
combinatorics
,
constructive algorithms
,
math
1700
x9430
1695C
Zero Path
brute force
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
1700
x10406
1693B
Fake Plastic Trees
dfs and similar
,
dp
,
greedy
,
trees
1700
x8081
1692H
Gambling
data structures
,
dp
,
greedy
,
math
1700
x7109
1690F
Shifting String
graphs
,
math
,
number theory
,
strings
1700
x6834
1688C
Manipulating History
constructive algorithms
,
greedy
,
strings
1700
x7919
1687B
Railway System
constructive algorithms
,
graphs
,
greedy
,
interactive
,
sortings
1700
x3490
1684D
Traps
constructive algorithms
,
greedy
,
sortings
1700
x9332
1681D
Required Length
brute force
,
dfs and similar
,
dp
,
hashing
,
shortest paths
1700
x9282
1677B
Tokitsukaze and Meeting
data structures
,
implementation
,
math
1700
x4024
1672D
Cyclic Rotation
constructive algorithms
,
greedy
,
implementation
,
two pointers
1700
x5995
1670D
Very Suspicious
binary search
,
brute force
,
geometry
,
greedy
,
implementation
,
math
1700
x4960
1661C
Water the Trees
binary search
,
greedy
,
math
1700
x8987
1660F1
Promising String (easy version)
brute force
,
implementation
,
math
,
strings
1700
x7012
1658C
Shinju and the Lost Permutation
constructive algorithms
,
math
1700
x9101
1644D
Cross Coloring
data structures
,
implementation
,
math
1700
x7002
1628B
Peculiar Movie Preferences
greedy
,
strings
1700
x11210
1626C
Monsters And Spells
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1700
x10629
1625C
Road Optimization
dp
1700
x10089
1621C
Hidden Permutations
dfs and similar
,
interactive
,
math
1700
x6733
1619E
MEX and Increments
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
sortings
1700
x8718
1618E
Singers' Tour
constructive algorithms
,
math
1700
x6975
1611E1
Escape The Maze (easy version)
dfs and similar
,
greedy
,
shortest paths
,
trees
,
two pointers
1700
x6965
1608C
Game Master
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
two pointers
1700
x6423
1598D
Training Session
combinatorics
,
data structures
,
geometry
,
implementation
,
math
1700
x8415
1594D
The Number of Imposters
constructive algorithms
,
dfs and similar
,
dp
,
dsu
,
graphs
1700
x7115
1592C
Bakry and Partitioning
bitmasks
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
trees
1700
x7631
1583C
Omkar and Determination
data structures
,
dp
1700
x6816
1580A
Portal
brute force
,
data structures
,
dp
,
greedy
,
implementation
1700
x3564
1579F
Array Stabilization (AND version)
brute force
,
graphs
,
math
,
number theory
,
shortest paths
1700
x4574
1579E2
Array Optimization by Deque
data structures
,
greedy
1700
x6368
1578H
Higher Order Functions
implementation
,
strings
1700
x1990
1571E
Fix the String
*special problem
,
bitmasks
,
dp
,
greedy
1700
x325
1562D1
Two Hundred Twenty One (easy version)
data structures
,
dp
,
math
1700
x6190
1561D1
Up the Strip (simplified version)
brute force
,
data structures
,
dp
,
math
,
number theory
1700
x5395
1557C
Moamen and XOR
bitmasks
,
combinatorics
,
dp
,
math
,
matrices
1700
x8343
1554B
Cobb
bitmasks
,
brute force
,
greedy
,
math
1700
x12443
1551D1
Domino (easy version)
constructive algorithms
,
math
1700
x6860
1550C
Manhattan Subarrays
brute force
,
geometry
,
greedy
,
implementation
1700
x9952
1543D1
RPD and Rap Sheet (Easy Version)
bitmasks
,
constructive algorithms
,
interactive
,
math
1700
x7448
1538D
Another Problem About Dividing Numbers
constructive algorithms
,
math
,
number theory
1700
x13093
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combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
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combinatorics
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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
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shortest paths
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strings
ternary search
trees
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