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Problems
#
Name
1428H
Rotary Laser Lock
binary search
,
interactive
3500
x90
1428G2
Lucky Numbers (Hard Version)
dp
,
greedy
3000
x614
1428G1
Lucky Numbers (Easy Version)
dp
,
greedy
2900
x552
1428F
Fruit Sequences
binary search
,
data structures
,
divide and conquer
,
dp
,
two pointers
2400
x2171
1428E
Carrots for Rabbits
binary search
,
data structures
,
greedy
,
math
,
sortings
2200
x3530
1428D
Bouncing Boomerangs
constructive algorithms
,
greedy
,
implementation
1900
x4420
1428C
ABBB
brute force
,
data structures
,
greedy
,
strings
1100
x19798
1428B
Belted Rooms
graphs
,
implementation
1200
x14198
1428A
Box is Pull
math
800
x16187
1427H
Prison Break
binary search
,
games
,
geometry
,
ternary search
3500
x70
1427G
One Billion Shades of Grey
flows
,
graphs
3300
x260
1427F
Boring Card Game
data structures
,
greedy
,
trees
3200
x310
1427E
Xum
bitmasks
,
constructive algorithms
,
math
,
matrices
,
number theory
2500
x1270
1427D
Unshuffling a Deck
constructive algorithms
,
implementation
2000
x3380
1427C
The Hard Work of Paparazzi
dp
2000
x5491
1427B
Chess Cheater
greedy
,
implementation
,
sortings
1400
x10719
1427A
Avoiding Zero
math
,
sortings
900
x16862
1426F
Number of Subsequences
combinatorics
,
dp
,
strings
2000
x5140
1426E
Rock, Paper, Scissors
brute force
,
constructive algorithms
,
flows
,
greedy
,
math
1800
x7251
1426D
Non-zero Segments
constructive algorithms
,
data structures
,
greedy
,
sortings
1500
x15574
1426C
Increase and Copy
binary search
,
constructive algorithms
,
math
1100
x19065
1426B
Symmetric Matrix
implementation
900
x20387
1426A
Floor Number
implementation
,
math
800
x45872
1425I
Impressive Harvesting of The Orchard
data structures
2800
x231
1425H
Huge Boxes of Animal Toys
constructive algorithms
1300
x4089
1425F
Flamingoes of Mystery
interactive
1400
x5303
1425E
Excitation of Atoms
greedy
,
implementation
2200
x910
1425D
Danger of Mad Snakes
combinatorics
,
dp
,
math
2300
x809
1425C
Captain of Knights
math
3100
x40
1425B
Blue and Red of Our Faculty!
divide and conquer
,
dp
2600
x274
1425A
Arena of Greed
games
,
greedy
1400
x6383
1424M
Ancient Language
graphs
,
sortings
2200
x522
1424G
Years
data structures
,
sortings
1300
x5662
1423N
BubbleSquare Tokens
3500
x149
1423M
Milutin's Plums
interactive
2800
x148
1423L
Light switches
meet-in-the-middle
2600
x434
1423K
Lonely Numbers
binary search
,
math
,
number theory
,
two pointers
1600
x4695
1423J
Bubble Cup hypothesis
bitmasks
,
constructive algorithms
,
dp
,
math
2400
x739
1423I
Lookup Tables
bitmasks
3000
x103
1423H
Virus
data structures
,
divide and conquer
,
dsu
,
graphs
2500
x510
1423G
Growing flowers
data structures
3500
x182
1423F
Coins
math
2700
x363
1423E
5G Antenna Towers
geometry
2700
x75
1423D
Does anyone else hate the wind?
3100
x36
1423C
Dušan's Railway
divide and conquer
,
graphs
,
trees
3500
x131
1423B
Valuable Paper
binary search
,
flows
,
graph matchings
,
graphs
1900
x1776
1423A
Wakanda Forever
3500
x67
1422F
Boring Queries
data structures
,
math
,
number theory
2700
x974
1422E
Minlexes
dp
,
greedy
,
implementation
,
strings
2700
x733
1422D
Returning Home
graphs
,
shortest paths
,
sortings
2300
x2594
1422C
Bargain
combinatorics
,
dp
,
math
1700
x8103
1422B
Nice Matrix
greedy
,
implementation
,
math
1300
x14192
1422A
Fence
geometry
,
math
800
x20663
1421E
Swedish Heroes
brute force
,
dp
,
implementation
2700
x681
1421D
Hexagons
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
shortest paths
1900
x4056
1421C
Palindromifier
constructive algorithms
,
strings
1400
x12548
1421B
Putting Bricks in the Wall
constructive algorithms
,
implementation
1100
x12896
1421A
XORwice
bitmasks
,
greedy
,
math
800
x27458
1420E
Battle Lemmings
dp
,
greedy
2500
x850
1420D
Rescue Nibel!
combinatorics
,
data structures
,
sortings
1800
x7363
1420C2
Pokémon Army (hard version)
data structures
,
divide and conquer
,
dp
,
greedy
,
implementation
2100
x4527
1420C1
Pokémon Army (easy version)
constructive algorithms
,
dp
,
greedy
1300
x17104
1420B
Rock and Lever
bitmasks
,
math
1200
x23965
1420A
Cubes Sorting
math
,
sortings
900
x22903
1419F
Rain of Fire
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
2800
x477
1419E
Decryption
constructive algorithms
,
implementation
,
math
,
number theory
2100
x3151
1419D2
Sage's Birthday (hard version)
binary search
,
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x14868
1419D1
Sage's Birthday (easy version)
binary search
,
constructive algorithms
,
greedy
,
sortings
1000
x23707
1419C
Killjoy
greedy
,
implementation
,
math
1500
x14983
1419B
Stairs
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
1200
x15983
1419A
Digit Game
games
,
greedy
,
implementation
900
x19294
1418G
Three Occurrences
data structures
,
divide and conquer
,
hashing
,
two pointers
2500
x1470
1418F
Equal Product
data structures
,
math
,
number theory
,
two pointers
3000
x358
1418E
Expected Damage
binary search
,
combinatorics
,
probabilities
2400
x1730
1418D
Trash Problem
data structures
,
implementation
2100
x4192
1418C
Mortal Kombat Tower
dp
,
graphs
,
greedy
,
shortest paths
1500
x18419
1418B
Negative Prefixes
greedy
,
sortings
1300
x16325
1418A
Buying Torches
math
1000
x21650
1417B
Two Arrays
greedy
,
math
,
sortings
1100
x14345
1417A
Copy-paste
greedy
,
math
800
x18059
1416F
Showing Off
flows
,
graph matchings
,
greedy
,
implementation
3300
x385
1416E
Split
binary search
,
data structures
,
dp
,
greedy
3200
x279
1416D
Graph and Queries
data structures
,
dsu
,
graphs
,
implementation
,
trees
2600
x1888
1416C
XOR Inverse
bitmasks
,
data structures
,
divide and conquer
,
dp
,
greedy
,
math
,
sortings
,
strings
,
trees
2000
x4199
1416B
Make Them Equal
constructive algorithms
,
greedy
,
math
2000
x5921
1416A
k-Amazing Numbers
binary search
,
data structures
,
implementation
,
two pointers
1500
x11840
1415F
Cakes for Clones
dp
2900
x407
1415E
New Game Plus!
constructive algorithms
,
greedy
,
math
2200
x2595
1415D
XOR-gun
bitmasks
,
brute force
,
constructive algorithms
2000
x5208
1415C
Bouncing Ball
brute force
,
dp
,
implementation
1400
x10686
1415B
Repainting Street
brute force
,
brute force
,
greedy
1100
x12015
1415A
Prison Break
brute force
,
math
800
x14935
1413F
Roads and Ramen
data structures
,
trees
2800
x711
1413E
Solo mid Oracle
greedy
,
math
,
ternary search
2100
x1922
1413D
Shurikens
data structures
,
greedy
,
implementation
1700
x6352
1413C
Perform Easily
binary search
,
brute force
,
dp
,
implementation
,
sortings
,
two pointers
1900
x5554
1413B
A New Technique
implementation
1100
x11623
1413A
Finding Sasuke
constructive algorithms
,
math
800
x14606
1411G
No Game No Life
bitmasks
,
games
,
math
,
matrices
2700
x581
1411F
The Thorny Path
greedy
,
math
3000
x321
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Codeforces Round 950 (Div. 3)
2 days
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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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