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Codeforces Round (Div. 2)
35:07:03
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combine-tags-by-or
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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
131E
Yet Another Task with Queens
sortings
1700
x1828
131D
Subway
dfs and similar
,
graphs
1600
x4583
131C
The World is a Theatre
combinatorics
,
math
1400
x10883
130J
Date calculation
*special problem
1800
x329
130H
Balanced brackets
*special problem
1600
x545
130G
CAPS LOCK ON
*special problem
1700
x276
130F
Prime factorization
*special problem
1600
x276
130E
Tribonacci numbers
*special problem
1600
x295
130D
Exponentiation
*special problem
1500
x389
130C
Decimal sum
*special problem
1500
x490
130B
Gnikool Ssalg
*special problem
,
implementation
,
strings
1400
x523
128A
Statues
dfs and similar
1500
x3153
126B
Password
binary search
,
dp
,
hashing
,
string suffix structures
,
strings
1700
x18586
125C
Hobbits' Party
constructive algorithms
,
greedy
1600
x908
125A
Measuring Lengths in Baden
math
1400
x2662
124B
Permutations
brute force
,
combinatorics
,
implementation
1400
x3830
123B
Squares
math
1800
x1104
121B
Lucky Transformation
strings
1500
x2551
120H
Brevity is Soul of Wit
graph matchings
1800
x1364
120G
Boom
implementation
1800
x684
120F
Spiders
dp
,
greedy
,
trees
1400
x3538
120E
Put Knight!
games
,
math
1400
x2676
120D
Three Sons
brute force
1400
x1908
118D
Caesar's Legions
dp
1700
x17071
117B
Very Interesting Game
brute force
,
number theory
1800
x1547
115B
Lawnmower
greedy
,
sortings
1500
x2453
114B
PFAST Inc.
bitmasks
,
brute force
,
graphs
1500
x3571
113A
Grammar Lessons
implementation
,
strings
1600
x2271
111A
Petya and Inequiations
greedy
1400
x4702
108B
Datatypes
math
,
sortings
1400
x2434
107B
Basketball Team
combinatorics
,
dp
,
math
,
probabilities
1600
x3386
107A
Dorm Water Supply
dfs and similar
,
graphs
1400
x5015
106D
Treasure Island
brute force
,
implementation
1700
x1306
106C
Buns
dp
1700
x5834
105B
Dark Assembly
brute force
,
probabilities
1800
x806
105A
Transmigration
implementation
1700
x1825
103B
Cthulhu
dfs and similar
,
dsu
,
graphs
1500
x8655
101B
Buses
binary search
,
data structures
,
dp
1700
x2529
100I
Rotation
*special problem
,
geometry
,
math
1500
x344
100G
Name the album
*special problem
,
data structures
,
implementation
1800
x112
100F
Polynom
*special problem
,
implementation
1800
x135
100E
Lamps in a Line
*special problem
,
math
1600
x269
100D
World of Mouth
*special problem
,
strings
1500
x302
100C
A+B
*special problem
,
implementation
1400
x525
100B
Friendly Numbers
*special problem
,
implementation
1500
x539
98A
Help Victoria the Wise
brute force
,
implementation
1700
x1176
95B
Lucky Numbers
dp
,
greedy
1800
x1194
95A
Hockey
implementation
,
strings
1600
x1650
93A
Frames
implementation
1700
x1921
91B
Queue
binary search
,
data structures
1500
x6666
91A
Newspaper Headline
greedy
,
strings
1500
x3543
89A
Robbery
greedy
1800
x1464
88B
Keyboard
implementation
1500
x4496
87B
Vasya and Types
implementation
,
strings
1800
x1122
87A
Trains
implementation
,
math
1500
x5265
86A
Reflection
math
1600
x1354
85B
Embassy Queue
data structures
,
greedy
1800
x963
84C
Biathlon
binary search
,
implementation
1700
x1599
83B
Doctor
binary search
,
math
,
sortings
1800
x1629
82B
Sets
constructive algorithms
,
hashing
,
implementation
1700
x2022
81C
Average Score
greedy
,
math
,
sortings
1700
x1642
81B
Sequence Formatting
implementation
,
strings
1700
x1924
81A
Plug-in
implementation
1400
x10417
79C
Beaver
data structures
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x1742
79B
Colorful Field
implementation
,
sortings
1400
x6985
77B
Falling Anvils
math
,
probabilities
1800
x2576
77A
Heroes
brute force
,
implementation
1400
x1755
76E
Points
implementation
,
math
1700
x1689
76D
Plus and xor
dp
,
greedy
,
math
1700
x2036
75C
Modified GCD
binary search
,
number theory
1600
x12338
75B
Facetook Priority Wall
expression parsing
,
implementation
,
strings
1500
x3252
74B
Train
dp
,
games
,
greedy
1500
x1521
73C
LionAge II
dp
1800
x2079
73A
The Elder Trolls IV: Oblivon
greedy
,
math
1600
x1322
72I
Goofy Numbers
*special problem
,
implementation
1500
x458
72H
Reverse It!
*special problem
,
implementation
1600
x263
72E
Ali goes shopping
*special problem
,
brute force
,
strings
1800
x153
72A
Goshtasp, Vishtasp and Eidi
*special problem
,
greedy
,
math
1800
x185
71C
Round Table Knights
dp
,
math
,
number theory
1600
x6316
70B
Text Messaging
expression parsing
,
greedy
,
strings
1600
x1740
69E
Subsegments
data structures
,
implementation
1800
x4190
68B
Energy exchange
binary search
1600
x4265
67B
Restoration of the Permutation
greedy
1800
x757
67A
Partial Teacher
dp
,
graphs
,
greedy
,
implementation
1800
x2090
66D
Petya and His Friends
constructive algorithms
,
math
,
number theory
1700
x3099
66C
Petya and File System
data structures
,
implementation
1800
x1003
65B
Harry Potter and the History of Magic
brute force
,
greedy
,
implementation
1700
x1330
65A
Harry Potter and Three Spells
implementation
,
math
1800
x1796
64E
Prime Segment
*special problem
,
brute force
,
math
,
number theory
1800
x238
64D
Presents
*special problem
,
greedy
1800
x285
64C
Table
*special problem
,
greedy
,
implementation
,
math
1600
x335
64B
Expression
*special problem
,
expression parsing
1500
x1006
63C
Bulls and Cows
brute force
,
implementation
1700
x1656
62B
Tyndex.Brome
binary search
,
implementation
1800
x1269
61D
Eternal Victory
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
1800
x6376
60B
Serial Time!
dfs and similar
,
dsu
1400
x4525
59C
Title
expression parsing
1600
x2038
58C
Trees
brute force
1800
x1989
57B
Martian Architecture
implementation
1600
x996
56C
Corporation Mail
data structures
,
expression parsing
,
implementation
1700
x1131
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