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ICPC Challenge
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Before contest
Codeforces Round 914 (Div. 2)
33:08:07
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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
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Custom test
Problems
#
Name
127B
Canvas Frames
implementation
1000
x7660
127A
Wasted Time
geometry
900
x10411
126E
Pills
brute force
,
flows
2900
x75
126D
Fibonacci Sums
dp
,
math
2300
x783
126C
E-reader Display
constructive algorithms
,
greedy
2000
x687
126B
Password
binary search
,
dp
,
hashing
,
string suffix structures
,
strings
1700
x16602
126A
Hot Bath
binary search
,
brute force
,
math
1900
x1372
125E
MST Company
binary search
,
graphs
2400
x952
125D
Two progressions
constructive algorithms
,
greedy
2200
x376
125C
Hobbits' Party
constructive algorithms
,
greedy
1600
x863
125B
Simple XML
implementation
1000
x2635
125A
Measuring Lengths in Baden
math
1400
x2547
124B
Permutations
brute force
,
combinatorics
,
implementation
1400
x3483
124A
The number of positions
math
1000
x34047
123E
Maze
dfs and similar
,
dp
,
probabilities
,
trees
2500
x658
123D
String
string suffix structures
2300
x1133
123C
Brackets
combinatorics
,
dp
,
greedy
2300
x567
123B
Squares
math
1800
x1064
123A
Prime Permutation
implementation
,
number theory
,
strings
1300
x3449
122B
Lucky Substring
brute force
,
implementation
1000
x11601
122A
Lucky Division
brute force
,
number theory
1000
x108616
121E
Lucky Array
data structures
2400
x1502
121D
Lucky Segments
binary search
,
implementation
,
two pointers
2500
x261
121C
Lucky Permutation
brute force
,
combinatorics
,
number theory
1900
x1229
121B
Lucky Transformation
strings
1500
x2487
121A
Lucky Sum
implementation
1100
x8436
120J
Minimum Sum
divide and conquer
,
geometry
,
sortings
1900
x882
120I
Luck is in Numbers
greedy
2200
x298
120H
Brevity is Soul of Wit
graph matchings
1800
x1320
120G
Boom
implementation
1800
x670
120F
Spiders
dp
,
greedy
,
trees
1400
x3404
120E
Put Knight!
games
,
math
1400
x2590
120D
Three Sons
brute force
1400
x1849
120C
Winnie-the-Pooh and honey
implementation
,
math
1100
x3507
120B
Quiz League
implementation
1100
x3256
120A
Elevator
brute force
,
implementation
,
math
1000
x4343
119E
Alternative Reality
geometry
2400
x92
119D
String Transformation
hashing
,
strings
2500
x455
119C
Education Reform
dp
2000
x828
119B
Before Exam
constructive algorithms
,
implementation
,
sortings
1900
x1040
119A
Epic Game
implementation
800
x26275
118E
Bertown roads
dfs and similar
,
graphs
2000
x5650
118D
Caesar's Legions
dp
1700
x15916
118C
Fancy Number
brute force
,
greedy
,
sortings
,
strings
1900
x2458
118B
Present from Lena
constructive algorithms
,
implementation
1000
x26664
118A
String Task
implementation
,
strings
1000
x168810
117E
Tree or not Tree
data structures
,
divide and conquer
,
implementation
,
trees
2900
x291
117D
Not Quick Transformation
divide and conquer
,
math
2500
x329
117C
Cycle
dfs and similar
,
graphs
2000
x2447
117B
Very Interesting Game
brute force
,
number theory
1800
x1522
117A
Elevator
implementation
,
math
1300
x1952
116B
Little Pigs and Wolves
greedy
,
implementation
1100
x13125
116A
Tram
implementation
800
x122594
115E
Linear Kingdom Races
data structures
,
dp
2400
x1239
115D
Unambiguous Arithmetic Expression
dp
,
expression parsing
2600
x353
115C
Plumber
math
2200
x585
115B
Lawnmower
greedy
,
sortings
1500
x2377
115A
Party
dfs and similar
,
graphs
,
trees
900
x31074
114B
PFAST Inc.
bitmasks
,
brute force
,
graphs
1500
x3366
114A
Cifera
math
1000
x13340
113E
Sleeping
combinatorics
,
implementation
,
math
2700
x110
113D
Museum
math
,
matrices
,
probabilities
2700
x615
113C
Double Happiness
brute force
,
math
,
number theory
2200
x1174
113B
Petr#
brute force
,
data structures
,
hashing
,
strings
2000
x2508
113A
Grammar Lessons
implementation
,
strings
1600
x2175
112B
Petya and Square
implementation
,
math
1200
x3992
112A
Petya and Strings
implementation
,
strings
800
x192855
111E
Petya and Rectangle
2900
x62
111D
Petya and Coloring
combinatorics
,
dp
2300
x687
111C
Petya and Spiders
bitmasks
,
dp
,
dsu
2100
x1218
111B
Petya and Divisors
binary search
,
data structures
,
number theory
1900
x3437
111A
Petya and Inequiations
greedy
1400
x4516
110B
Lucky String
constructive algorithms
,
strings
1100
x9616
110A
Nearly Lucky Number
implementation
800
x130740
109E
Lucky Interval
brute force
,
math
2700
x94
109D
Lucky Sorting
constructive algorithms
,
sortings
2000
x608
109C
Lucky Tree
dp
,
dsu
,
trees
1900
x3088
109B
Lucky Probability
brute force
,
probabilities
1900
x1300
109A
Lucky Sum of Digits
brute force
,
implementation
1000
x15791
108B
Datatypes
math
,
sortings
1400
x2332
108A
Palindromic Times
implementation
,
strings
1000
x8854
107E
Darts
geometry
,
probabilities
2700
x125
107D
Crime Management
dp
,
graphs
,
matrices
2400
x393
107C
Arrangement
bitmasks
,
dp
2400
x358
107B
Basketball Team
combinatorics
,
dp
,
math
,
probabilities
1600
x3155
107A
Dorm Water Supply
dfs and similar
,
graphs
1400
x4741
106E
Space Rescuers
geometry
,
ternary search
2100
x776
106D
Treasure Island
brute force
,
implementation
1700
x1259
106C
Buns
dp
1700
x5454
106B
Choosing Laptop
brute force
,
implementation
1000
x5718
106A
Card Game
implementation
1000
x7224
105E
Lift and Throw
brute force
2500
x176
105D
Entertaining Geodetics
brute force
,
dsu
,
implementation
2700
x132
105C
Item World
brute force
,
implementation
,
sortings
2200
x266
105B
Dark Assembly
brute force
,
probabilities
1800
x783
105A
Transmigration
implementation
1700
x1750
104A
Blackjack
implementation
800
x14172
103E
Buying Sets
flows
,
graph matchings
2900
x728
103D
Time to Raid Cowavans
brute force
,
data structures
,
sortings
2100
x1860
103C
Russian Roulette
constructive algorithms
,
greedy
1900
x924
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