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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
1078E
Negative Time Summation
constructive algorithms
3400
x86
1349E
Slime and Hats
constructive algorithms
,
dp
,
greedy
3500
x85
958D2
Hyperspace Jump (hard)
2700
x85
28E
DravDe saves the world
geometry
,
math
2800
x85
1889E
Doremy's Swapping Trees
dfs and similar
,
graphs
,
trees
3500
x84
1628F
Spaceship Crisis Management
binary search
,
data structures
,
geometry
,
sortings
3500
x84
901E
Cyclic Cipher
fft
,
math
3300
x84
730L
Expression Queries
data structures
3200
x84
648E
Собери число
graphs
,
shortest paths
2300
x84
65E
Harry Potter and Moving Staircases
dfs and similar
,
implementation
2900
x84
64I
Sort the Table
*special problem
,
sortings
2400
x84
1864I
Future Dominators
graphs
,
greedy
3500
x82
207D9
The Beaver's Problem - 3
1800
x82
207D8
The Beaver's Problem - 3
2300
x82
126E
Pills
brute force
,
flows
2900
x82
39K
Testing
2600
x82
1357D4
Quantum Classification - Dataset 6
x81
457E
Flow Optimality
constructive algorithms
,
flows
,
math
3000
x81
1949A
Grove
brute force
,
dfs and similar
,
dp
,
geometry
,
probabilities
3300
x80
1726H
Mainak and the Bleeding Polygon
binary search
,
geometry
,
implementation
,
math
3500
x80
1533H
Submatrices
*special problem
,
bitmasks
,
data structures
,
dp
x80
1276E
Four Stones
constructive algorithms
3500
x80
765G
Math, math everywhere
brute force
,
dp
,
math
,
meet-in-the-middle
,
number theory
3200
x80
471E
MUH and Lots and Lots of Segments
data structures
,
dsu
2700
x80
207D10
The Beaver's Problem - 3
2100
x80
1949E
Damage per Second
brute force
,
math
2900
x79
1545E2
AquaMoon and Time Stop (hard version)
data structures
,
dp
3500
x79
142E
Help Greg the Dwarf 2
geometry
3000
x79
1943F
Minimum Hamming Distance
dp
3500
x78
1940A
Parallel Universes
*special problem
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
x78
1896H1
Cyclic Hamming (Easy Version)
brute force
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x78
1357D5
Quantum Classification - Dataset 7
x78
771F
Bear and Isomorphic Points
geometry
,
two pointers
3300
x78
690F2
Tree of Life (medium)
constructive algorithms
,
hashing
,
trees
2700
x78
661E
Divisibility Check
*special problem
2000
x78
207D6
The Beaver's Problem - 3
2100
x78
1938D
Bánh Bò
3300
x77
1910H
Sum of Digits of Sums
*special problem
,
binary search
,
data structures
2400
x77
1870H
Standard Graph Problem
data structures
,
graphs
,
greedy
,
trees
3500
x77
1761F2
Anti-median (Hard Version)
combinatorics
,
dp
,
math
3500
x77
1687F
Koishi's Unconscious Permutation
fft
,
math
3500
x77
838F
Expected Earnings
2800
x77
207C2
Game with Two Trees
2200
x77
153D
Date Change
*special problem
2000
x77
1704H2
Game of AI (hard version)
combinatorics
,
fft
,
math
3500
x76
1446E
Long Recovery
constructive algorithms
,
dfs and similar
3500
x76
1375I
Cubic Lattice
geometry
,
math
,
matrices
,
number theory
3500
x76
1055G
Jellyfish Nightmare
3500
x75
345D
Chain Letter
*special problem
,
dfs and similar
,
graphs
2200
x75
72B
INI-file
*special problem
,
implementation
2200
x75
1909I
Short Permutation Problem
combinatorics
,
dp
,
fft
,
math
1900
x74
1545E1
AquaMoon and Time Stop (easy version)
data structures
,
dp
3500
x74
1423E
5G Antenna Towers
geometry
2700
x74
100H
Battleship
*special problem
,
dfs and similar
,
implementation
2100
x74
73F
Plane of Tanks
brute force
,
geometry
2900
x74
1868E
Min-Sum-Max
constructive algorithms
,
dp
,
greedy
3500
x73
1491I
Ruler Of The Zoo
brute force
,
data structures
3500
x73
1116D6
Hessenberg matrix
x73
1874G
Jellyfish and Inscryption
dp
3500
x72
1750H
BinaryStringForces
constructive algorithms
,
data structures
,
dp
3500
x72
1302F
Keep talking and nobody explodes -- easy
bitmasks
,
brute force
,
expression parsing
x72
923F
Public Service
constructive algorithms
,
graphs
,
trees
3200
x72
153E
Euclidean Distance
*special problem
2100
x72
72D
Perse-script
*special problem
,
expression parsing
2300
x72
1863H
Goldberg Machine 3
dp
,
trees
3500
x71
1776N
Count Permutations
math
3500
x71
1571G
A Battle Against a Dragon
*special problem
,
data structures
,
dp
2500
x71
162I
Truncatable primes
*special problem
2000
x71
1654H
Three Minimums
combinatorics
,
constructive algorithms
,
divide and conquer
,
dp
,
fft
,
math
3500
x70
1326G
Spiderweb Trees
dp
,
geometry
,
trees
3500
x70
68E
Contact
geometry
2900
x70
1949H
Division Avoidance
greedy
,
math
3100
x69
1868F
LIS?
data structures
,
greedy
,
implementation
3500
x69
1863I
Redundant Routes
constructive algorithms
,
dp
,
trees
3500
x69
1427H
Prison Break
binary search
,
games
,
geometry
,
ternary search
3500
x69
737F
Dirty plates
constructive algorithms
,
math
3300
x69
1889F
Doremy's Average Tree
data structures
,
dp
,
greedy
,
trees
3500
x68
1218B
Guarding warehouses
data structures
,
geometry
3000
x68
1170G
Graph Decomposition
*special problem
,
graphs
x68
223D
Spider
geometry
,
graphs
3000
x68
1310F
Bad Cryptography
math
,
number theory
3400
x67
865F
Egg Roulette
bitmasks
,
brute force
,
divide and conquer
,
math
,
meet-in-the-middle
3300
x67
1936F
Grand Finale: Circles
binary search
,
geometry
3300
x66
1599E
Two Arrays
data structures
,
matrices
3200
x66
1423A
Wakanda Forever
3500
x66
1211G
King's Path
*special problem
,
math
,
trees
2500
x66
164E
Polycarpus and Tasks
3100
x66
1965F
Conference
data structures
,
flows
3300
x65
1297G
M-numbers
*special problem
,
dp
,
math
x65
856E
Satellites
3100
x65
1776K
Uniform Chemistry
dp
,
math
3200
x64
1580E
Railway Construction
brute force
,
constructive algorithms
,
data structures
,
graphs
,
shortest paths
3400
x64
1517H
Fly Around the World
dp
,
geometry
3500
x64
1431H
Rogue-like Game
*special problem
,
brute force
,
greedy
,
two pointers
2600
x64
1070M
Algoland and Berland
constructive algorithms
,
divide and conquer
,
geometry
3000
x64
853E
Lada Malina
data structures
,
geometry
3400
x64
175F
Gnomes of Might and Magic
data structures
,
graphs
,
implementation
,
shortest paths
3000
x64
111E
Petya and Rectangle
2900
x64
44F
BerPaint
geometry
,
graphs
2700
x64
661H
Rotate Matrix
*special problem
2400
x63
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