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Before contest
Kotlin Heroes: Practice 6
24:02:03
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Before contest
Educational Codeforces Round 105 (Rated for Div. 2)
25:02:03
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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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Problems
#
Name
1431J
Zero-XOR Array
*special problem
,
dp
3400
x11
1403C
Chess Rush
*special problem
,
combinatorics
,
dp
,
implementation
,
math
3200
x30
1211H
Road Repair in Treeland
*special problem
,
binary search
,
dp
,
trees
3100
x27
1211I
Unusual Graph
*special problem
,
graphs
3000
x20
683J
The Hero with Bombs
*special problem
3000
x26
775A
University Schedule
*special problem
2900
1431I
Cyclic Shifts
*special problem
,
strings
2900
x20
1346I
Pac-Man 2.0
*special problem
,
dp
2900
x21
1387C
Viruses
*special problem
,
dp
,
shortest paths
,
string suffix structures
2900
x54
1402B
Roads
*special problem
,
geometry
,
sortings
2900
x65
1386B
Mixture
*special problem
,
data structures
,
geometry
,
math
,
sortings
2900
x74
290F
Greedy Petya
*special problem
,
dfs and similar
,
graphs
,
greedy
2800
x79
1386C
Joker
*special problem
,
bitmasks
,
data structures
,
divide and conquer
,
dsu
2800
x163
1346H
Game with Segments
*special problem
,
data structures
,
games
2700
x25
345E
Black Cat Rush
*special problem
2700
x34
345F
Superstitions Inspection
*special problem
2700
x35
774G
Perfectionist Arkadiy
*special problem
,
number theory
2700
x73
774F
Pens And Days Of Week
*special problem
,
binary search
,
number theory
2700
x79
1386A
Colors
*special problem
,
binary search
,
constructive algorithms
,
interactive
2700
x146
1431H
Rogue-like Game
*special problem
,
brute force
,
greedy
,
two pointers
2600
x48
1402C
Star Trek
*special problem
,
combinatorics
,
dfs and similar
,
dp
,
games
,
graphs
,
matrices
,
trees
2600
x129
683I
Loader
*special problem
2500
x25
530I
Different variables
*special problem
2500
x36
1211G
King's Path
*special problem
,
math
,
trees
2500
x48
290E
HQ
*special problem
,
constructive algorithms
2500
x139
1387B2
Village (Maximum)
*special problem
,
dfs and similar
,
trees
2500
x308
661H
Rotate Matrix
*special problem
2400
x37
100J
Interval Coloring
*special problem
,
greedy
,
math
2400
x41
64I
Sort the Table
*special problem
,
sortings
2400
x63
409I
Feed the Golorp
*special problem
2400
x79
1403A
The Potion of Great Power
*special problem
,
2-sat
,
binary search
,
data structures
,
graphs
,
interactive
,
sortings
,
two pointers
2400
x202
72D
Perse-script
*special problem
,
expression parsing
2300
x51
774I
Composing Of String
*special problem
,
dp
2300
x70
470G
Hamming Distance
*special problem
2300
x83
470F
Pairwise Sums
*special problem
2300
x88
64H
Table Bowling
*special problem
,
sortings
2300
x89
1211F
kotlinkotlinkotlinkotlin...
*special problem
,
graphs
,
implementation
,
strings
2300
x92
1346G
Two IP Cameras
*special problem
,
math
,
number theory
2300
x104
130I
Array sorting
*special problem
,
sortings
2300
x117
470H
Array Sorting
*special problem
2300
x152
774E
Big Number and Remainder
*special problem
,
math
,
number theory
2300
x171
1403B
Spring cleaning
*special problem
,
data structures
,
dfs and similar
,
graphs
,
trees
2300
x246
661G
Hungarian Notation
*special problem
2200
x36
345G
Suffix Subgroup
*special problem
,
strings
2200
x39
72B
INI-file
*special problem
,
implementation
2200
x48
345D
Chain Letter
*special problem
,
dfs and similar
,
graphs
2200
x69
153C
Caesar Cipher
*special problem
2200
x74
64G
Path Canonization
*special problem
2200
x92
774H
Repairing Of String
*special problem
,
constructive algorithms
2200
x204
172E
BHTML+BCSS
*special problem
,
dfs and similar
,
expression parsing
2200
x242
409G
On a plane
*special problem
2200
x346
153E
Euclidean Distance
*special problem
2100
x54
100H
Battleship
*special problem
,
dfs and similar
,
implementation
2100
x55
530G
Levenshtein distance
*special problem
2100
x86
530F
Jumping frogs
*special problem
2100
x86
1431G
Number Deletion Game
*special problem
,
dp
,
games
,
greedy
2100
x101
530H
Points in triangle
*special problem
,
geometry
2100
x111
661D
Maximal Difference
*special problem
2100
x112
345B
Triskaidekaphobia
*special problem
2100
x113
1431F
Neural Network Problem
*special problem
,
binary search
,
greedy
2100
x120
774B
Significant Cups
*special problem
,
binary search
,
data structures
,
two pointers
2100
x174
774A
Amusement Park
*special problem
,
ternary search
2100
x261
1387A
Graph
*special problem
,
binary search
,
dfs and similar
,
dp
,
math
,
ternary search
2100
x390
1387B1
Village (Minimum)
*special problem
,
dp
,
greedy
,
trees
2100
x537
656D
Rosetta Problem
*special problem
2100
x638
644C
Hostname Aliases
*special problem
,
binary search
,
data structures
,
implementation
,
sortings
,
strings
2100
x834
162G
Non-decimal sum
*special problem
2000
x38
162I
Truncatable primes
*special problem
2000
x49
661E
Divisibility Check
*special problem
2000
x61
153D
Date Change
*special problem
2000
x63
661C
Array Sum
*special problem
2000
x111
345C
Counting Fridays
*special problem
2000
x111
64F
Domain
*special problem
,
expression parsing
2000
x139
1211E
Double Permutation Inc.
*special problem
,
binary search
,
greedy
2000
x156
1211D
Teams
*special problem
,
binary search
,
greedy
,
math
2000
x163
1431E
Chess Match
*special problem
2000
x177
1346F
Dune II: Battle For Arrakis
*special problem
,
data structures
,
greedy
,
math
2000
x181
774L
Bars
*special problem
,
binary search
2000
x201
774J
Stepan's Series
*special problem
,
dp
2000
x273
1057C
Tanya and Colored Candies
*special problem
,
dp
2000
x464
656C
Without Text
*special problem
2000
x500
784B
Kids' Riddle
*special problem
2000
x603
656E
Out of Controls
*special problem
2000
x617
784G
BF Calculator
*special problem
2000
x628
171C
A Piece of Cake
*special problem
,
implementation
2000
x651
171E
MYSTERIOUS LANGUAGE
*special problem
2000
x786
291E
Tree-String Problem
*special problem
,
dfs and similar
,
hashing
,
strings
2000
x1029
522D
Closest Equals
*special problem
,
data structures
2000
x1534
784E
Twisted Circuit
*special problem
,
brute force
,
implementation
2000
x1561
661F
Primes in Interval
*special problem
1900
x77
683H
Exchange of Books
*special problem
1900
x78
72F
Oil
*special problem
,
greedy
,
math
1900
x82
683G
The Fraction
*special problem
1900
x111
470D
Caesar Cipher
*special problem
1900
x132
470C
Eval
*special problem
1900
x157
470E
Chessboard
*special problem
1900
x176
162D
Remove digits
*special problem
1900
x195
661B
Seasons
*special problem
1900
x198
784D
Touchy-Feely Palindromes
*special problem
,
implementation
1900
x291
656G
You're a Professional
*special problem
1900
x407
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