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Pinely Round 4 (Div. 1 + Div. 2)
14:01:15
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Difficulty:
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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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Custom test
Problems
#
Name
178B3
Greedy Merchants
1800
x1151
178B2
Greedy Merchants
1600
x659
178B1
Greedy Merchants
1600
x743
177F1
Script Generation
1800
x298
177E2
Space Voyage
binary search
1900
x417
177E1
Space Voyage
binary search
1700
x591
177D2
Encrypting Messages
data structures
1500
x1872
177C2
Party
brute force
,
dfs and similar
,
dsu
,
graphs
1500
x2495
177C1
Party
dfs and similar
,
dsu
,
graphs
1500
x2509
176B
Word Cut
dp
1700
x1742
175C
Geometry Horse
greedy
,
implementation
,
sortings
,
two pointers
1600
x1303
175B
Plane of Tanks: Pro
implementation
1400
x1391
175A
Robot Bicorn Attack
brute force
,
implementation
1400
x2365
174C
Range Increments
data structures
,
greedy
1800
x1078
174B
File List
dp
,
greedy
,
implementation
1400
x2214
173C
Spiral Maximum
brute force
,
dp
1900
x970
173B
Chamber of Secrets
dfs and similar
,
shortest paths
1800
x2972
173A
Rock-Paper-Scissors
implementation
,
math
1300
x2255
172D
Calendar Reform
*special problem
,
number theory
1500
x1388
172C
Bus
*special problem
,
implementation
,
sortings
1500
x1132
171H
A polyline
*special problem
,
implementation
1700
x273
171G
Mysterious numbers - 2
*special problem
1600
x911
171F
ucyhf
*special problem
,
brute force
,
implementation
,
number theory
1600
x1262
171D
Broken checker
*special problem
,
brute force
1300
x2550
171B
Star
*special problem
,
combinatorics
1300
x4000
168B
Wizards and Minimal Spell
implementation
,
strings
1700
x1210
167B
Wizards and Huge Prize
dp
,
math
,
probabilities
1800
x2122
167A
Wizards and Trolleybuses
implementation
,
math
1600
x2019
166E
Tetrahedron
dp
,
math
,
matrices
1500
x20472
166C
Median
greedy
,
math
,
sortings
1500
x6403
165C
Another Problem on Strings
binary search
,
brute force
,
dp
,
math
,
strings
,
two pointers
1600
x12058
165B
Burning Midnight Oil
binary search
,
implementation
1500
x17164
164A
Variable, or There and Back Again
dfs and similar
,
graphs
1700
x992
163A
Substring and Subsequence
dp
1700
x2647
162J
Brackets
*special problem
1800
x94
162H
Alternating case
*special problem
1800
x218
162F
Factorial zeros
*special problem
1800
x201
162E
HQ9+
*special problem
1800
x177
162D
Remove digits
*special problem
1900
x228
162C
Prime factorization
*special problem
1800
x781
162B
Binary notation
*special problem
1800
x313
161D
Distance in Tree
dfs and similar
,
dp
,
trees
1800
x14237
161B
Discounts
constructive algorithms
,
greedy
,
sortings
1700
x1944
161A
Dress'em in Vests!
binary search
,
brute force
,
greedy
,
two pointers
1300
x4779
160C
Find Pair
implementation
,
math
,
sortings
1700
x3419
159E
Zebra Tower
*special problem
,
data structures
,
greedy
,
sortings
1700
x996
159D
Palindrome pairs
*special problem
,
brute force
,
dp
,
strings
1500
x4292
159C
String Manipulation 1.0
*special problem
,
binary search
,
brute force
,
data structures
,
strings
1400
x2957
159A
Friends or Not
*special problem
,
greedy
,
implementation
1400
x2468
158E
Phone Talks
*special problem
,
dp
,
sortings
1900
x1453
158D
Ice Sculptures
*special problem
,
brute force
,
number theory
1300
x6207
158C
Cd and pwd commands
*special problem
,
data structures
,
implementation
1400
x9035
156B
Suspects
constructive algorithms
,
data structures
,
implementation
1600
x2208
156A
Message
brute force
1700
x3022
154B
Colliders
math
,
number theory
1600
x4415
154A
Hometask
greedy
1600
x4014
153B
Binary notation
*special problem
1800
x156
153A
A + B
*special problem
1600
x768
152C
Pocket Book
combinatorics
1400
x10459
152B
Steps
binary search
,
implementation
1300
x6508
150B
Quantity of Strings
combinatorics
,
dfs and similar
,
graphs
,
math
1600
x4052
150A
Win or Freeze
games
,
math
,
number theory
1400
x7672
149D
Coloring Brackets
dp
1900
x3693
149C
Division into Teams
greedy
,
math
,
sortings
1500
x5326
149B
Martian Clock
implementation
1600
x2237
148E
Porcelain
dp
1900
x3889
148D
Bag of mice
dp
,
games
,
math
,
probabilities
1800
x6991
148C
Terse princess
constructive algorithms
,
greedy
1700
x3082
148B
Escape
implementation
,
math
1500
x5373
147A
Punctuation
implementation
,
strings
1300
x3587
146B
Lucky Mask
brute force
,
implementation
1300
x4297
145B
Lucky Number 2
constructive algorithms
1800
x2173
144D
Missile Silos
data structures
,
dfs and similar
,
graphs
,
shortest paths
1900
x3872
144C
Anagram Search
implementation
,
strings
1500
x3935
144B
Meeting
implementation
1300
x5157
142B
Help General
constructive algorithms
,
greedy
,
implementation
1800
x2190
142A
Help Farmer
brute force
,
math
1600
x2591
141C
Queue
constructive algorithms
,
greedy
,
sortings
1800
x2412
141B
Hopscotch
geometry
,
math
1400
x5256
140D
New Year Contest
greedy
,
sortings
1800
x2198
140C
New Year Snowmen
binary search
,
data structures
,
greedy
1800
x4303
140B
New Year Cards
brute force
,
greedy
,
implementation
1800
x1669
140A
New Year Table
geometry
,
math
1700
x4116
139B
Wallpaper
implementation
,
math
1600
x1289
138B
Digits Permutations
greedy
1900
x1016
138A
Literature Lesson
implementation
1600
x2367
137D
Palindromes
dp
,
strings
1900
x1488
137C
History
sortings
1500
x7135
135C
Zero-One
constructive algorithms
,
games
,
greedy
1900
x1325
135B
Rectangle and Square
brute force
,
geometry
,
math
1600
x2322
135A
Replacement
greedy
,
implementation
,
sortings
1300
x7496
134B
Pairs of Numbers
brute force
,
dfs and similar
,
math
,
number theory
1900
x1977
132C
Logo Turtle
dp
1800
x2293
132A
Turing Tape
implementation
1300
x2753
131E
Yet Another Task with Queens
sortings
1700
x1828
131D
Subway
dfs and similar
,
graphs
1600
x4587
131C
The World is a Theatre
combinatorics
,
math
1400
x10897
130J
Date calculation
*special problem
1800
x329
130H
Balanced brackets
*special problem
1600
x545
130G
CAPS LOCK ON
*special problem
1700
x277
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