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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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Custom test
Problems
#
Name
178F1
Representative Sampling
1800
x408
178D1
Magic Squares
1500
x649
178C1
Smart Beaver and Resolving Collisions
1600
x497
178B3
Greedy Merchants
1800
x1251
178B2
Greedy Merchants
1600
x684
178B1
Greedy Merchants
1600
x772
177F1
Script Generation
1800
x306
177E1
Space Voyage
binary search
1700
x625
177D2
Encrypting Messages
data structures
1500
x2052
177C2
Party
brute force
,
dfs and similar
,
dsu
,
graphs
1500
x2610
177C1
Party
dfs and similar
,
dsu
,
graphs
1500
x2610
176B
Word Cut
dp
1700
x1874
175C
Geometry Horse
greedy
,
implementation
,
sortings
,
two pointers
1600
x1330
175B
Plane of Tanks: Pro
implementation
1400
x1433
175A
Robot Bicorn Attack
brute force
,
implementation
1400
x2421
174C
Range Increments
data structures
,
greedy
1800
x1158
174B
File List
dp
,
greedy
,
implementation
1400
x2296
173B
Chamber of Secrets
dfs and similar
,
shortest paths
1800
x3251
172D
Calendar Reform
*special problem
,
number theory
1500
x1405
172C
Bus
*special problem
,
implementation
,
sortings
1500
x1149
171H
A polyline
*special problem
,
implementation
1700
x285
171G
Mysterious numbers - 2
*special problem
1600
x941
171F
ucyhf
*special problem
,
brute force
,
implementation
,
number theory
1600
x1293
168B
Wizards and Minimal Spell
implementation
,
strings
1700
x1224
167B
Wizards and Huge Prize
dp
,
math
,
probabilities
1800
x2177
167A
Wizards and Trolleybuses
implementation
,
math
1600
x2048
166E
Tetrahedron
dp
,
math
,
matrices
1500
x21671
166C
Median
greedy
,
math
,
sortings
1500
x6569
165C
Another Problem on Strings
binary search
,
brute force
,
dp
,
math
,
strings
,
two pointers
1600
x12441
165B
Burning Midnight Oil
binary search
,
implementation
1500
x18530
164A
Variable, or There and Back Again
dfs and similar
,
graphs
1700
x1020
163A
Substring and Subsequence
dp
1700
x2739
162J
Brackets
*special problem
1800
x97
162H
Alternating case
*special problem
1800
x220
162F
Factorial zeros
*special problem
1800
x202
162E
HQ9+
*special problem
1800
x178
162C
Prime factorization
*special problem
1800
x849
162B
Binary notation
*special problem
1800
x314
161D
Distance in Tree
dfs and similar
,
dp
,
trees
1800
x15364
161B
Discounts
constructive algorithms
,
greedy
,
sortings
1700
x1965
160C
Find Pair
implementation
,
math
,
sortings
1700
x3467
159E
Zebra Tower
*special problem
,
data structures
,
greedy
,
sortings
1700
x1004
159D
Palindrome pairs
*special problem
,
brute force
,
dp
,
strings
1500
x4338
159C
String Manipulation 1.0
*special problem
,
binary search
,
brute force
,
data structures
,
strings
1400
x3009
159A
Friends or Not
*special problem
,
greedy
,
implementation
1400
x2499
158C
Cd and pwd commands
*special problem
,
data structures
,
implementation
1400
x9350
156B
Suspects
constructive algorithms
,
data structures
,
implementation
1600
x2243
156A
Message
brute force
1700
x3052
154B
Colliders
math
,
number theory
1600
x4851
154A
Hometask
greedy
1600
x4080
153B
Binary notation
*special problem
1800
x157
153A
A + B
*special problem
1600
x827
152C
Pocket Book
combinatorics
1400
x10728
150B
Quantity of Strings
combinatorics
,
dfs and similar
,
graphs
,
math
1600
x4268
150A
Win or Freeze
games
,
math
,
number theory
1400
x7908
149C
Division into Teams
greedy
,
math
,
sortings
1500
x5418
149B
Martian Clock
implementation
1600
x2267
148D
Bag of mice
dp
,
games
,
math
,
probabilities
1800
x7403
148C
Terse princess
constructive algorithms
,
greedy
1700
x3160
148B
Escape
implementation
,
math
1500
x5556
145B
Lucky Number 2
constructive algorithms
1800
x2232
144C
Anagram Search
implementation
,
strings
1500
x4037
142B
Help General
constructive algorithms
,
greedy
,
implementation
1800
x2252
142A
Help Farmer
brute force
,
math
1600
x2641
141C
Queue
constructive algorithms
,
greedy
,
sortings
1800
x2484
141B
Hopscotch
geometry
,
math
1400
x5432
140D
New Year Contest
greedy
,
sortings
1800
x2218
140C
New Year Snowmen
binary search
,
data structures
,
greedy
1800
x4401
140B
New Year Cards
brute force
,
greedy
,
implementation
1800
x1684
140A
New Year Table
geometry
,
math
1700
x4169
139B
Wallpaper
implementation
,
math
1600
x1317
138A
Literature Lesson
implementation
1600
x2398
137C
History
sortings
1500
x7268
135B
Rectangle and Square
brute force
,
geometry
,
math
1600
x2385
132C
Logo Turtle
dp
1800
x2364
131E
Yet Another Task with Queens
sortings
1700
x1867
131D
Subway
dfs and similar
,
graphs
1600
x4727
131C
The World is a Theatre
combinatorics
,
math
1400
x11292
130J
Date calculation
*special problem
1800
x341
130H
Balanced brackets
*special problem
1600
x610
130G
CAPS LOCK ON
*special problem
1700
x285
130F
Prime factorization
*special problem
1600
x279
130E
Tribonacci numbers
*special problem
1600
x297
130D
Exponentiation
*special problem
1500
x394
130C
Decimal sum
*special problem
1500
x503
130B
Gnikool Ssalg
*special problem
,
implementation
,
strings
1400
x536
128A
Statues
dfs and similar
1500
x3226
126B
Password
binary search
,
dp
,
hashing
,
string suffix structures
,
strings
1700
x19983
125C
Hobbits' Party
constructive algorithms
,
greedy
1600
x935
125A
Measuring Lengths in Baden
math
1400
x2755
124B
Permutations
brute force
,
combinatorics
,
implementation
1400
x3995
123B
Squares
math
1800
x1137
121B
Lucky Transformation
strings
1500
x2590
120H
Brevity is Soul of Wit
graph matchings
1800
x1423
120G
Boom
implementation
1800
x691
120F
Spiders
dp
,
greedy
,
trees
1400
x3677
120E
Put Knight!
games
,
math
1400
x2749
120D
Three Sons
brute force
1400
x1944
118D
Caesar's Legions
dp
1700
x17751
117B
Very Interesting Game
brute force
,
number theory
1800
x1618
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