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WorldQuant Round 1 (Codeforces Round 1128, Div. 1 + Div. 2)
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
communication
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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Custom test
Problems
#
Name
203E
Transportation
greedy
,
sortings
,
two pointers
2300
x338
203D
Hit Ball
geometry
,
implementation
,
math
1700
x1525
203C
Photographer
greedy
,
sortings
1400
x6132
203B
Game on Paper
brute force
,
implementation
1300
x2858
203A
Two Problems
brute force
,
implementation
1200
x4497
202B
Brand New Easy Problem
brute force
1700
x866
202A
LLPS
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
strings
800
x20386
201E
Thoroughly Bureaucratic Organization
binary search
,
combinatorics
2600
x551
201D
Brand New Problem
bitmasks
,
brute force
,
dp
2600
x494
201C
Fragile Bridges
dp
2000
x1581
201B
Guess That Car!
math
,
ternary search
1800
x1411
201A
Clear Symmetry
constructive algorithms
,
dp
,
math
1700
x3276
200E
Tractor College
implementation
,
math
,
number theory
,
ternary search
2400
x376
200D
Programming Language
binary search
,
brute force
,
expression parsing
,
implementation
1800
x1068
200C
Football Championship
brute force
,
implementation
1800
x1234
200B
Drinks
implementation
,
math
800
x157032
200A
Cinema
brute force
,
data structures
2400
x768
199B
Special Olympics
geometry
1900
x890
199A
Hexadecimal's theorem
brute force
,
constructive algorithms
,
implementation
,
number theory
900
x31189
198E
Gripping Story
binary search
,
data structures
,
sortings
2400
x596
198D
Cube Snake
constructive algorithms
2700
x118
198C
Delivering Carcinogen
binary search
,
geometry
2400
x454
198B
Jumping on Walls
shortest paths
1400
x5491
198A
About Bacteria
implementation
,
math
1700
x3364
197B
Limit
math
1400
x4977
197A
Plate Game
constructive algorithms
,
games
,
math
1600
x6973
196E
Opening Portals
dsu
,
graphs
,
shortest paths
2600
x1297
196D
The Next Good String
data structures
,
greedy
,
hashing
,
strings
2800
x672
196C
Paint Tree
constructive algorithms
,
divide and conquer
,
geometry
,
sortings
,
trees
2200
x1076
196B
Infinite Maze
dfs and similar
,
graphs
2000
x2523
196A
Lexicographically Maximum Subsequence
greedy
,
strings
1100
x5924
195E
Building Forest
data structures
,
dsu
,
graphs
2000
x939
195D
Analyzing Polyline
geometry
,
math
,
sortings
1900
x1142
195C
Try and Catch
expression parsing
,
implementation
1800
x1266
195B
After Training
data structures
,
implementation
,
math
1300
x5563
195A
Let's Watch Football
binary search
,
brute force
,
math
1000
x10401
194B
Square
math
1200
x4059
194A
Exams
implementation
,
math
900
x11111
193E
Fibonacci Number
brute force
,
math
,
matrices
2900
x430
193D
Two Segments
data structures
2900
x684
193C
Hamming Distance
constructive algorithms
,
greedy
,
math
,
matrices
2400
x711
193B
Xor
brute force
2000
x1195
193A
Cutting Figure
constructive algorithms
,
graphs
,
trees
1700
x4811
192B
Walking in the Rain
brute force
,
implementation
1100
x6889
192A
Funky Numbers
binary search
,
brute force
,
implementation
1300
x11759
191E
Thwarting Demonstrations
binary search
,
data structures
,
trees
2200
x997
191D
Metro Scheme
graphs
,
greedy
2700
x428
191C
Fools and Roads
data structures
,
dfs and similar
,
trees
1900
x10167
191B
Demonstration
greedy
1700
x1110
191A
Dynasty Puzzles
dp
1500
x4696
190E
Counter Attack
data structures
,
dsu
,
graphs
,
hashing
,
sortings
2100
x1844
190D
Non-Secret Cypher
two pointers
1900
x2720
190C
STL
dfs and similar
1500
x3289
190B
Surrounded
geometry
1800
x3133
190A
Vasya and the Bus
greedy
,
math
1100
x6373
189B
Counting Rhombi
brute force
,
math
1300
x4274
189A
Cut Ribbon
brute force
,
dp
1300
x85935
188H
Stack
*special problem
,
expression parsing
,
implementation
1800
x765
188G
Array Sorting
*special problem
,
implementation
1600
x365
188F
Binary Notation
*special problem
,
implementation
1400
x352
188E
HQ9+
*special problem
,
implementation
1400
x560
188D
Asterisks
*special problem
,
implementation
1100
x761
188C
LCM
*special problem
,
implementation
,
math
1400
x534
188B
A + Reverse B
*special problem
,
implementation
1300
x817
188A
Hexagonal Numbers
*special problem
1100
x870
187E
Heaven Tour
data structures
,
greedy
2900
x124
187D
BRT Contract
data structures
2800
x631
187C
Weak Memory
dfs and similar
,
dsu
2000
x1651
187B
AlgoRace
dp
,
shortest paths
1800
x2407
187A
Permutations
greedy
1500
x3094
186B
Growing Mushrooms
greedy
,
sortings
1200
x6283
186A
Comparing Strings
implementation
,
strings
1100
x18823
185E
Soap Time! - 2
binary search
,
data structures
3000
x268
185D
Visit of the Great
math
,
number theory
2600
x552
185C
Clever Fat Rat
dp
2500
x151
185B
Mushroom Scientists
math
,
ternary search
1800
x1811
185A
Plant
math
1300
x6710
183E
Candy Shop
greedy
2900
x236
183D
T-shirt
dp
,
greedy
,
probabilities
2700
x532
183C
Cyclic Coloring
dfs and similar
2200
x780
183B
Zoo
brute force
,
geometry
1700
x864
183A
Headquarters
constructive algorithms
,
math
1700
x676
182E
Wooden Fence
dp
1800
x1742
182D
Common Divisors
brute force
,
hashing
,
implementation
,
math
,
strings
1400
x9546
182C
Optimal Sum
data structures
,
greedy
2000
x906
182B
Vasya's Calendar
implementation
1000
x7474
182A
Battlefield
geometry
,
graphs
,
implementation
,
shortest paths
2200
x373
181B
Number of Triplets
binary search
,
brute force
1300
x3627
181A
Series of Crimes
brute force
,
geometry
,
implementation
800
x9147
180F
Mathematical Analysis Rocks!
constructive algorithms
,
implementation
,
math
1200
x2950
180E
Cubes
binary search
,
dp
,
two pointers
1800
x2172
180D
Name
greedy
,
strings
1900
x828
180C
Letter
dp
1400
x8827
180B
Divisibility Rules
math
,
number theory
2300
x517
180A
Defragmentation
implementation
1800
x650
178F3
Representative Sampling
2500
x663
178F2
Representative Sampling
dp
,
sortings
,
strings
2200
x400
178F1
Representative Sampling
1800
x470
178E3
The Beaver's Problem - 2
2300
x218
178E2
The Beaver's Problem - 2
2000
x246
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