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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
1469E
A Bit Similar
bitmasks
,
brute force
,
hashing
,
string suffix structures
,
strings
,
two pointers
2400
x1969
1469D
Ceil Divisions
brute force
,
constructive algorithms
,
math
,
number theory
1700
x9424
1469C
Building a Fence
dp
,
greedy
,
implementation
,
two pointers
1600
x10741
1468M
Similar Sets
data structures
,
graphs
,
implementation
2300
x945
1468L
Prime Divisors Selection
binary search
,
greedy
,
math
,
number theory
2700
x323
1468K
The Robot
brute force
,
implementation
1600
x5090
1468J
Road Reform
dsu
,
graphs
,
greedy
1800
x4267
1468I
Plane Tiling
geometry
,
implementation
,
math
2500
x500
1468H
K and Medians
constructive algorithms
,
greedy
,
math
2200
x1791
1468G
Hobbits
binary search
,
geometry
2500
x815
1468F
Full Turn
geometry
,
hashing
,
number theory
1700
x3712
1468D
Firecrackers
binary search
,
sortings
1700
x4654
1468C
Berpizza
data structures
,
implementation
1400
x7808
1468B
Bakery
data structures
,
dsu
2900
x214
1468A
LaIS
data structures
,
dp
,
greedy
2200
x1662
1467E
Distinctive Roots in a Tree
data structures
,
dfs and similar
,
dp
,
trees
2500
x1437
1467D
Sum of Paths
combinatorics
,
dp
,
math
2200
x3674
1467C
Three Bags
constructive algorithms
,
greedy
1900
x6391
1467B
Hills And Valleys
brute force
,
implementation
1700
x10931
1466I
The Riddle of the Sphinx
binary search
,
data structures
,
data structures
,
interactive
3400
x197
1466H
Finding satisfactory solutions
combinatorics
,
dp
,
graphs
,
greedy
,
math
3300
x272
1466G
Song of the Sirens
combinatorics
,
divide and conquer
,
hashing
,
math
,
string suffix structures
,
strings
2600
x921
1466F
Euclid's nightmare
bitmasks
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
2100
x2867
1466E
Apollo versus Pan
bitmasks
,
brute force
,
math
1800
x7294
1466D
13th Labour of Heracles
data structures
,
greedy
,
sortings
,
trees
1500
x11321
1464F
My Beautiful Madness
data structures
,
trees
3500
x323
1463F
Max Correct Set
bitmasks
,
dp
,
math
3100
x585
1463E
Plan of Lectures
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
2400
x1513
1463D
Pairs
binary search
,
constructive algorithms
,
greedy
,
two pointers
1900
x4427
1463C
Busy Robot
implementation
1800
x5654
1463B
Find The Array
bitmasks
,
constructive algorithms
,
greedy
1400
x19370
1462F
The Treasure of The Segments
binary search
,
data structures
,
greedy
1800
x6960
1462E2
Close Tuples (hard version)
binary search
,
combinatorics
,
implementation
,
math
,
sortings
,
two pointers
1700
x9679
1462E1
Close Tuples (easy version)
binary search
,
combinatorics
,
math
,
sortings
,
two pointers
1500
x13724
1462D
Add to Neighbour and Remove
greedy
,
math
,
number theory
1400
x16715
1461F
Mathematical Expression
constructive algorithms
,
dp
,
greedy
2700
x551
1461E
Water Level
brute force
,
graphs
,
greedy
,
implementation
,
math
2200
x2108
1461D
Divide and Summarize
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
,
sortings
1600
x9224
1461C
Random Events
dp
,
math
,
probabilities
1500
x11209
1461B
Find the Spruce
brute force
,
dp
,
implementation
1400
x12614
1458F
Range Diameter Sum
data structures
,
trees
3500
x279
1458E
Nim Shortcuts
data structures
,
games
3100
x493
1458D
Flip and Reverse
data structures
,
graphs
,
greedy
3100
x1094
1458C
Latin Square
math
,
matrices
2700
x1314
1458B
Glass Half Spilled
dp
2000
x3539
1458A
Row GCD
math
,
number theory
1600
x17674
1456E
XOR-ranges
dp
,
greedy
3500
x277
1455G
Forbidden Value
data structures
,
dp
2900
x409
1455F
String and Operations
dp
,
greedy
2800
x442
1455E
Four Points
brute force
,
constructive algorithms
,
flows
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
2400
x1524
1455D
Sequence and Swaps
dp
,
greedy
,
sortings
1600
x12309
1454F
Array Partition
binary search
,
data structures
,
greedy
,
two pointers
2100
x4034
1454E
Number of Simple Paths
combinatorics
,
dfs and similar
,
graphs
,
trees
2000
x5802
1453F
Even Harder
dp
2700
x837
1453E
Dog Snacks
binary search
,
dfs and similar
,
dp
,
greedy
,
trees
2300
x2037
1453D
Checkpoints
brute force
,
constructive algorithms
,
greedy
,
math
,
probabilities
1900
x4154
1453C
Triangles
greedy
,
implementation
1700
x6032
1453B
Suffix Operations
constructive algorithms
,
implementation
1400
x13326
1452G
Game On Tree
data structures
,
dfs and similar
,
greedy
,
trees
2700
x487
1452F
Divide Powers
constructive algorithms
,
greedy
2900
x317
1452E
Two Editorials
brute force
,
dp
,
greedy
,
sortings
,
two pointers
2500
x1559
1452D
Radio Towers
combinatorics
,
dp
,
math
1600
x7974
1452B
Toy Blocks
binary search
,
greedy
,
math
,
sortings
1400
x14696
1451F
Nullify The Matrix
constructive algorithms
,
games
2700
x983
1451E2
Bitwise Queries (Hard Version)
bitmasks
,
constructive algorithms
,
interactive
,
math
2300
x2963
1451E1
Bitwise Queries (Easy Version)
bitmasks
,
constructive algorithms
,
interactive
,
math
2000
x4367
1451D
Circle Game
games
,
geometry
,
math
1700
x9511
1451C
String Equality
dp
,
greedy
,
hashing
,
implementation
,
strings
1400
x15555
1450H2
Multithreading (Hard Version)
combinatorics
,
implementation
,
math
3300
x218
1450H1
Multithreading (Easy Version)
combinatorics
,
fft
,
math
2900
x435
1450G
Communism
bitmasks
,
dp
,
trees
3500
x311
1450F
The Struggling Contestant
constructive algorithms
,
greedy
2400
x1346
1450E
Capitalism
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2700
x1121
1450D
Rating Compression
binary search
,
data structures
,
greedy
,
implementation
,
two pointers
1800
x5474
1450C2
Errich-Tac-Toe (Hard Version)
constructive algorithms
,
math
2300
x3693
1450C1
Errich-Tac-Toe (Easy Version)
constructive algorithms
,
math
2100
x5496
1446F
Line Distance
binary search
,
data structures
,
geometry
3200
x331
1446E
Long Recovery
constructive algorithms
,
dfs and similar
3500
x85
1446D2
Frequency Problem (Hard Version)
data structures
,
greedy
,
two pointers
3000
x1302
1446D1
Frequency Problem (Easy Version)
data structures
,
greedy
2600
x1737
1446C
Xor Tree
binary search
,
bitmasks
,
data structures
,
divide and conquer
,
dp
,
trees
2100
x3626
1446B
Catching Cheaters
dp
,
strings
1800
x7830
1444E
Finding the Vertex
brute force
,
dfs and similar
,
dp
,
interactive
,
trees
3500
x137
1444D
Rectangular Polyline
constructive algorithms
,
dp
,
geometry
2900
x568
1444C
Team-Building
data structures
,
dfs and similar
,
dsu
,
graphs
2500
x1596
1444B
Divide and Sum
combinatorics
,
math
,
sortings
1900
x6301
1444A
Division
brute force
,
math
,
number theory
1500
x13014
1443E
Long Permutation
brute force
,
math
,
two pointers
2400
x1255
1443C
The Delivery Dilemma
binary search
,
greedy
,
sortings
1400
x15257
1442F
Differentiating Games
games
,
interactive
3400
x131
1442E
Black, White and Grey Tree
binary search
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
3000
x592
1442D
Sum
data structures
,
divide and conquer
,
dp
,
greedy
2800
x2215
1442C
Graph Transpositions
dfs and similar
,
graphs
,
greedy
,
shortest paths
2400
x1687
1442B
Identify the Operations
combinatorics
,
data structures
,
dsu
,
greedy
,
implementation
1800
x4483
1442A
Extreme Subtraction
constructive algorithms
,
dp
,
greedy
1800
x8867
1439E
Cheat and Win
bitmasks
,
data structures
,
games
,
trees
3500
x221
1439D
INOI Final Contests
combinatorics
,
dp
,
fft
3100
x369
1439C
Greedy Shopping
binary search
,
data structures
,
divide and conquer
,
greedy
,
implementation
2600
x1816
1439B
Graph Subset Problem
constructive algorithms
,
data structures
,
graphs
2600
x1470
1439A2
Binary Table (Hard Version)
constructive algorithms
,
graphs
,
greedy
,
implementation
1900
x5106
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