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Name
1566D1
Seating Arrangements (easy version)
data structures
,
greedy
,
sortings
1100
x13794
1562D2
Two Hundred Twenty One (hard version)
data structures
,
math
2200
x2079
1562D1
Two Hundred Twenty One (easy version)
data structures
,
dp
,
math
1700
x6191
1561D1
Up the Strip (simplified version)
brute force
,
data structures
,
dp
,
math
,
number theory
1700
x5397
1558F
Strange Sort
data structures
,
sortings
3300
x353
1558D
Top-Notch Insertions
combinatorics
,
data structures
2600
x926
1557D
Ezzat and Grid
data structures
,
dp
,
greedy
2200
x2484
1556G
Gates to Another World
bitmasks
,
data structures
,
dsu
,
two pointers
3300
x309
1556E
Equilibrium
data structures
,
dp
,
greedy
2200
x2515
1555F
Good Graph
data structures
,
dsu
,
graphs
,
trees
2700
x830
1555E
Boring Segments
data structures
,
sortings
,
trees
,
two pointers
2100
x3870
1553F
Pairwise Modulo
data structures
,
math
2300
x2108
1552F
Telepanting
binary search
,
data structures
,
dp
,
sortings
2200
x2794
1552E
Colors and Intervals
constructive algorithms
,
data structures
,
greedy
,
sortings
2300
x1774
1551B2
Wonderful Coloring - 2
binary search
,
constructive algorithms
,
data structures
,
greedy
1400
x15091
1550F
Jumping Around
binary search
,
data structures
,
divide and conquer
,
dp
,
dsu
,
graphs
,
shortest paths
2700
x631
1548E
Gregor and the Two Painters
data structures
,
divide and conquer
,
graphs
,
greedy
,
math
3400
x339
1548B
Integers Have Friends
binary search
,
data structures
,
divide and conquer
,
math
,
number theory
,
two pointers
1800
x9333
1547F
Array Stabilization (GCD version)
binary search
,
brute force
,
data structures
,
divide and conquer
,
number theory
,
two pointers
1900
x5525
1547E
Air Conditioners
data structures
,
dp
,
implementation
,
shortest paths
,
sortings
,
two pointers
1500
x13892
1545F
AquaMoon and Potatoes
brute force
,
data structures
,
dp
3500
x105
1545E2
AquaMoon and Time Stop (hard version)
data structures
,
dp
3500
x79
1545E1
AquaMoon and Time Stop (easy version)
data structures
,
dp
3500
x74
1540D
Inverse Inversions
binary search
,
brute force
,
data structures
3200
x264
1539F
Strange Array
data structures
,
greedy
,
sortings
2600
x837
1539E
Game with Cards
binary search
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
2500
x925
1538E
Funny Substrings
data structures
,
hashing
,
implementation
,
matrices
,
strings
2100
x2811
1538C
Number of Pairs
binary search
,
data structures
,
math
,
two pointers
1300
x27150
1537E2
Erase and Extend (Hard Version)
binary search
,
data structures
,
greedy
,
hashing
,
string suffix structures
,
strings
,
two pointers
2200
x4998
1536D
Omkar and Medians
data structures
,
greedy
,
implementation
2000
x4564
1536C
Diluc and Kaeya
data structures
,
dp
,
hashing
,
number theory
1500
x13605
1535F
String Distance
binary search
,
brute force
,
data structures
,
hashing
,
implementation
,
strings
3000
x439
1535E
Gold Transfer
binary search
,
data structures
,
dp
,
greedy
,
interactive
,
trees
2200
x2642
1535D
Playoff Tournament
data structures
,
dfs and similar
,
dp
,
implementation
,
trees
1800
x7503
1534G
A New Beginning
data structures
,
dp
,
geometry
,
sortings
3300
x527
1533H
Submatrices
*special problem
,
bitmasks
,
data structures
,
dp
x80
1533E
Chess Team Forming
*special problem
,
binary search
,
data structures
,
greedy
x272
1533C
Sweets
*special problem
,
data structures
,
implementation
x467
1530H
Turing's Award
data structures
,
dp
3400
x143
1528C
Trees of Tranquillity
data structures
,
dfs and similar
,
greedy
,
trees
2300
x2510
1527E
Partition Game
binary search
,
data structures
,
divide and conquer
,
dp
2500
x2094
1526D
Kill Anton
brute force
,
constructive algorithms
,
data structures
,
math
,
strings
2200
x2359
1526C2
Potions (Hard Version)
data structures
,
greedy
1600
x21171
1526C1
Potions (Easy Version)
brute force
,
data structures
,
dp
,
greedy
1500
x21326
1525C
Robot Collisions
data structures
,
greedy
,
implementation
,
sortings
2000
x4339
1523H
Hopping Around the Array
data structures
,
dp
3500
x234
1523G
Try Booking
data structures
,
divide and conquer
3200
x403
1523C
Compression and Expansion
brute force
,
data structures
,
greedy
,
implementation
,
trees
1600
x8607
1521D
Nastia Plays with a Tree
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
trees
2500
x1809
1520F2
Guess the K-th Zero (Hard version)
binary search
,
constructive algorithms
,
data structures
,
interactive
2200
x2904
1520D
Same Differences
data structures
,
hashing
,
math
1200
x43029
1519C
Berland Regional
brute force
,
data structures
,
greedy
,
number theory
,
sortings
1400
x16055
1517E
Group Photo
binary search
,
data structures
,
implementation
,
two pointers
2500
x946
1516D
Cut
binary search
,
data structures
,
dp
,
graphs
,
number theory
,
two pointers
2100
x4108
1515I
Phoenix and Diamonds
binary search
,
data structures
,
sortings
3400
x225
1515H
Phoenix and Bits
bitmasks
,
brute force
,
data structures
,
sortings
3500
x215
1515C
Phoenix and Towers
constructive algorithms
,
data structures
,
greedy
1400
x16562
1514D
Cut and Stick
binary search
,
data structures
,
greedy
,
implementation
,
sortings
2000
x4107
1513F
Swapping Problem
brute force
,
constructive algorithms
,
data structures
,
sortings
2500
x1201
1512D
Corrupted Array
constructive algorithms
,
data structures
,
greedy
1200
x21781
1511G
Chips on a Board
bitmasks
,
brute force
,
data structures
,
dp
,
games
,
two pointers
2700
x703
1511F
Chainword
brute force
,
data structures
,
dp
,
matrices
,
string suffix structures
,
strings
2700
x418
1511C
Yet Another Card Deck
brute force
,
data structures
,
implementation
,
trees
1100
x22297
1508F
Optimal Encoding
brute force
,
data structures
3500
x117
1508E
Tree Calendar
brute force
,
constructive algorithms
,
data structures
,
dfs and similar
,
sortings
,
trees
3100
x327
1508C
Complete the MST
bitmasks
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
2500
x1426
1506G
Maximize the Remaining String
brute force
,
data structures
,
dp
,
greedy
,
strings
2000
x4105
1506D
Epic Transformation
constructive algorithms
,
data structures
,
greedy
1400
x20819
1503F
Balance the Cards
constructive algorithms
,
data structures
,
divide and conquer
,
geometry
,
graphs
,
implementation
3500
x134
1503D
Flip the Cards
2-sat
,
constructive algorithms
,
data structures
,
greedy
,
sortings
,
two pointers
2600
x968
1503C
Travelling Salesman Problem
binary search
,
data structures
,
dp
,
greedy
,
shortest paths
,
sortings
,
two pointers
2200
x3207
1500E
Subset Trick
binary search
,
data structures
3300
x212
1500D
Tiles for Bathroom
data structures
,
sortings
,
two pointers
2900
x414
1499G
Graph Coloring
data structures
,
graphs
,
interactive
3100
x187
1499C
Minimum Grid Path
brute force
,
data structures
,
greedy
,
math
1500
x12361
1498F
Christmas Game
bitmasks
,
data structures
,
dfs and similar
,
dp
,
games
,
math
,
trees
2500
x856
1498C
Planar Reflections
brute force
,
data structures
,
dp
1600
x9218
1498B
Box Fitting
binary search
,
bitmasks
,
data structures
,
greedy
1300
x16186
1497E2
Square-free division (hard version)
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2500
x1569
1497E1
Square-Free Division (easy version)
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
1700
x8052
1497A
Meximization
brute force
,
data structures
,
greedy
,
sortings
800
x23922
1495F
Squares
constructive algorithms
,
data structures
,
dp
,
graphs
,
trees
3300
x281
1495E
Qingshan and Daniel
brute force
,
data structures
,
greedy
,
implementation
3200
x406
1494E
A-Z Graph
constructive algorithms
,
data structures
,
graphs
,
hashing
2400
x1664
1494D
Dogeforces
constructive algorithms
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
sortings
,
trees
2300
x2503
1493D
GCD of an Array
brute force
,
data structures
,
hashing
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2100
x4755
1492C
Maximum width
binary search
,
data structures
,
dp
,
greedy
,
two pointers
1500
x15622
1492B
Card Deck
data structures
,
greedy
,
math
1100
x18156
1491I
Ruler Of The Zoo
brute force
,
data structures
3500
x74
1491H
Yuezheng Ling and Dynamic Tree
data structures
,
trees
3400
x764
1491C
Pekora and Trampoline
brute force
,
data structures
,
dp
,
greedy
,
implementation
1700
x7731
1490G
Old Floppy Drive
binary search
,
data structures
,
math
1900
x5491
1490F
Equalize the Array
binary search
,
data structures
,
greedy
,
math
,
sortings
1500
x15518
1490E
Accidental Victory
binary search
,
data structures
,
greedy
1400
x18443
1488J
Flower Shop
*special problem
,
data structures
,
fft
,
math
3100
x31
1488H
Build From Suffixes
*special problem
,
combinatorics
,
data structures
2800
x54
1488G
Painting Numbers
*special problem
,
data structures
,
greedy
,
number theory
2500
x119
1488F
Dogecoin
*special problem
,
*special problem
,
binary search
,
data structures
2300
x169
1488E
Palindromic Doubles
*special problem
,
data structures
,
dp
2200
x206
1487E
Cheap Dinner
brute force
,
data structures
,
graphs
,
greedy
,
implementation
,
sortings
,
two pointers
2000
x4382
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