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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
1299D
Around the World
bitmasks
,
combinatorics
,
dfs and similar
,
dp
,
graphs
,
graphs
,
math
,
trees
3000
x418
341E
Candies Game
constructive algorithms
,
greedy
3000
x428
698F
Coprime Permutation
combinatorics
,
number theory
3000
x431
1801E
Gasoline prices
data structures
,
divide and conquer
,
dsu
,
hashing
,
trees
3000
x432
1175G
Yet Another Partiton Problem
data structures
,
divide and conquer
,
dp
,
geometry
,
two pointers
3000
x432
1558E
Down Below
binary search
,
dfs and similar
,
graphs
,
greedy
,
meet-in-the-middle
,
shortest paths
3000
x434
1535F
String Distance
binary search
,
brute force
,
data structures
,
hashing
,
implementation
,
strings
3000
x438
771E
Bear and Rectangle Strips
dp
,
greedy
3000
x441
1381D
The Majestic Brown Tree Snake
dfs and similar
,
dp
,
greedy
,
trees
,
two pointers
3000
x447
573D
Bear and Cavalry
data structures
,
divide and conquer
,
dp
3000
x449
1824D
LuoTianyi and the Function
data structures
3000
x450
1552G
A Serious Referee
bitmasks
,
brute force
,
dfs and similar
,
sortings
3000
x451
1637G
Birthday
constructive algorithms
,
greedy
,
math
3000
x456
1076G
Array Game
data structures
,
games
3000
x456
335F
Buy One, Get One Free
dp
,
greedy
3000
x456
798E
Mike and code of a permutation
constructive algorithms
,
data structures
,
graphs
,
sortings
3000
x458
453D
Little Pony and Elements of Harmony
dp
,
matrices
3000
x459
1545D
AquaMoon and Wrong Coordinate
constructive algorithms
,
interactive
,
math
3000
x461
582E
Boolean Function
bitmasks
,
dp
,
expression parsing
3000
x475
235D
Graph Game
graphs
3000
x476
696E
...Wait for it...
data structures
,
dsu
,
trees
3000
x484
1764G2
Doremy's Perfect DS Class (Medium Version)
binary search
,
interactive
3000
x497
1610F
Mashtali: a Space Oddysey
constructive algorithms
,
dfs and similar
,
graphs
3000
x501
793F
Julia the snail
data structures
,
divide and conquer
,
dp
3000
x507
1534F2
Falling Sand (Hard Version)
dfs and similar
,
dp
,
graphs
,
greedy
3000
x515
889E
Mod Mod Mod
binary search
,
dp
,
math
3000
x515
1889D
Game of Stacks
brute force
,
dfs and similar
,
graphs
,
implementation
,
trees
3000
x519
1854D
Michael and Hotel
binary search
,
interactive
,
trees
3000
x522
1508D
Swap Pass
constructive algorithms
,
geometry
,
sortings
3000
x529
1028G
Guess the number
dp
,
interactive
3000
x529
627E
Orchestra
two pointers
3000
x533
364E
Empty Rectangles
divide and conquer
,
two pointers
3000
x533
1442E
Black, White and Grey Tree
binary search
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
3000
x553
1842H
Tenzing and Random Real Numbers
bitmasks
,
dp
,
graphs
,
math
,
probabilities
3000
x561
568E
Longest Increasing Subsequence
data structures
,
dp
3000
x572
1707D
Partial Virtual Trees
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
3000
x583
1152F2
Neko Rules the Catniverse (Large Version)
bitmasks
,
dp
,
matrices
3000
x597
1428G2
Lucky Numbers (Hard Version)
dp
,
greedy
3000
x609
1603D
Artistic Partition
divide and conquer
,
dp
,
number theory
3000
x610
1438F
Olha and Igor
interactive
,
probabilities
,
trees
3000
x611
1476F
Lanterns
binary search
,
data structures
,
dp
3000
x624
1667E
Centroid Probabilities
combinatorics
,
dp
,
fft
,
math
3000
x625
1361E
James and the Chase
dfs and similar
,
graphs
,
probabilities
,
trees
3000
x627
1267G
Game Relics
math
,
probabilities
3000
x628
319E
Ping-Pong
data structures
3000
x632
1844G
Tree Weights
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
implementation
,
math
,
matrices
,
number theory
,
trees
3000
x643
1097G
Vladislav and a Great Legend
combinatorics
,
dp
,
trees
3000
x664
1320E
Treeland and Viruses
data structures
,
dfs and similar
,
dp
,
shortest paths
,
trees
3000
x665
1290D
Coffee Varieties (hard version)
constructive algorithms
,
graphs
,
interactive
3000
x668
1149D
Abandoning Roads
brute force
,
dp
,
graphs
,
greedy
3000
x670
1392H
ZS Shuffles Cards
combinatorics
,
dp
,
math
,
probabilities
3000
x673
232E
Quick Tortoise
bitmasks
,
divide and conquer
,
dp
3000
x674
506E
Mr. Kitayuta's Gift
combinatorics
,
dp
,
matrices
,
strings
3000
x685
1342F
Make It Ascending
bitmasks
,
brute force
,
dp
3000
x686
566C
Logistical Questions
dfs and similar
,
divide and conquer
,
trees
3000
x695
1616H
Keep XOR Low
bitmasks
,
combinatorics
,
data structures
,
divide and conquer
,
dp
,
math
3000
x789
150E
Freezing with Style
binary search
,
data structures
,
divide and conquer
,
trees
3000
x789
1163F
Indecisive Taxi Fee
data structures
,
graphs
,
shortest paths
3000
x823
429E
Points and Segments
graphs
3000
x832
559E
Gerald and Path
dp
,
sortings
3000
x856
891E
Lust
combinatorics
,
math
,
matrices
3000
x859
504E
Misha and LCP on Tree
binary search
,
dfs and similar
,
hashing
,
string suffix structures
,
trees
3000
x871
587F
Duff is Mad
data structures
,
strings
3000
x992
1019C
Sergey's problem
constructive algorithms
,
graphs
3000
x1073
997E
Good Subsegments
data structures
3000
x1084
603E
Pastoral Oddities
data structures
,
divide and conquer
,
dsu
,
math
,
trees
3000
x1156
1446D2
Frequency Problem (Hard Version)
data structures
,
greedy
,
two pointers
3000
x1213
464E
The Classic Problem
data structures
,
graphs
,
shortest paths
3000
x1302
618F
Double Knapsack
constructive algorithms
,
two pointers
3000
x1304
914F
Substrings in a String
bitmasks
,
brute force
,
data structures
,
string suffix structures
,
strings
3000
x1447
739E
Gosha is hunting
brute force
,
data structures
,
dp
,
flows
,
math
,
probabilities
,
sortings
3000
x2052
526F
Pudding Monsters
data structures
,
divide and conquer
3000
x2315
775A
University Schedule
*special problem
2900
927A
BuberPool Taxi Optimization
*special problem
,
interactive
2900
x1
1431I
Cyclic Shifts
*special problem
,
strings
2900
x42
1910J
Two Colors
*special problem
2900
x43
1346I
Pac-Man 2.0
*special problem
,
dp
2900
x43
1571H
Laser Beams
*special problem
,
geometry
,
probabilities
2900
x44
111E
Petya and Rectangle
2900
x64
68E
Contact
geometry
2900
x70
73F
Plane of Tanks
brute force
,
geometry
2900
x74
1949E
Damage per Second
brute force
,
math
2900
x82
126E
Pills
brute force
,
flows
2900
x82
65E
Harry Potter and Moving Staircases
dfs and similar
,
implementation
2900
x84
1090H
Linearization
graphs
2900
x88
955E
Icicles
2900
x90
187E
Heaven Tour
data structures
,
greedy
2900
x91
128E
Birthday
geometry
,
math
2900
x96
89E
Fire and Ice
greedy
2900
x97
1773J
Jumbled Trees
constructive algorithms
,
math
2900
x98
1402B
Roads
*special problem
,
geometry
,
sortings
2900
x103
1575F
Finding Expected Value
math
2900
x108
1218H
Function Composition
dfs and similar
2900
x109
1725D
Deducing Sortability
binary search
,
bitmasks
,
math
2900
x118
1386B
Mixture
*special problem
,
data structures
,
geometry
,
math
,
sortings
2900
x118
79E
Security System
math
2900
x118
1906I
Contingency Plan 2
graph matchings
2900
x125
1387C
Viruses
*special problem
,
dp
,
shortest paths
,
string suffix structures
2900
x125
1201E1
Knightmare (easy)
graphs
,
interactive
,
shortest paths
2900
x125
1810H
Last Number
combinatorics
,
math
2900
x129
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