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Before contest
Codeforces Round 941 (Div. 1)
13:02:17
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Before contest
Codeforces Round 941 (Div. 2)
13:02:17
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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
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number theory
probabilities
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shortest paths
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Problems
#
Name
683E
Hammer throwing
*special problem
1800
x187
1769D2
Игра в Девятку II
*special problem
,
brute force
2200
x186
470H
Array Sorting
*special problem
2300
x183
72A
Goshtasp, Vishtasp and Eidi
*special problem
,
greedy
,
math
1800
x181
1571F
Kotlinforces
*special problem
,
constructive algorithms
,
dp
2000
x176
64F
Domain
*special problem
,
expression parsing
2000
x175
774G
Perfectionist Arkadiy
*special problem
,
number theory
2700
x173
162E
HQ9+
*special problem
1800
x173
1940B
Three Arrays
*special problem
,
constructive algorithms
,
implementation
,
sortings
x171
1910E
Maximum Sum Subarrays
*special problem
,
dp
2100
x167
1488F
Dogecoin
*special problem
,
*special problem
,
binary search
,
data structures
2300
x167
130I
Array sorting
*special problem
,
sortings
2300
x164
1910F
Build Railway Stations
*special problem
,
greedy
,
trees
2000
x155
1431F
Neural Network Problem
*special problem
,
binary search
,
greedy
2100
x152
72E
Ali goes shopping
*special problem
,
brute force
,
strings
1800
x150
153B
Binary notation
*special problem
1800
x149
683F
Reformat the String
*special problem
1800
x146
530G
Levenshtein distance
*special problem
2100
x146
470D
Caesar Cipher
*special problem
1900
x145
1431G
Number Deletion Game
*special problem
,
dp
,
games
,
greedy
2100
x137
1356D1
Quantum Classification - 1
*special problem
x132
100F
Polynom
*special problem
,
implementation
1800
x132
1812H
Expected Twist
*special problem
,
interactive
x130
1346G
Two IP Cameras
*special problem
,
math
,
number theory
2300
x130
1275E2
Контрольная сумма
*special problem
x130
683G
The Fraction
*special problem
1900
x130
661C
Array Sum
*special problem
2000
x126
290F
Greedy Petya
*special problem
,
dfs and similar
,
graphs
,
greedy
2800
x126
661D
Maximal Difference
*special problem
2100
x124
1940D
Almost Certainly
*special problem
,
constructive algorithms
,
data structures
,
sortings
x123
1387C
Viruses
*special problem
,
dp
,
shortest paths
,
string suffix structures
2900
x122
1356D2
Quantum Classification - 2
*special problem
x122
345C
Counting Fridays
*special problem
2000
x121
345B
Triskaidekaphobia
*special problem
2100
x121
530H
Points in triangle
*special problem
,
geometry
2100
x119
1386B
Mixture
*special problem
,
data structures
,
geometry
,
math
,
sortings
2900
x118
1211F
kotlinkotlinkotlinkotlin...
*special problem
,
graphs
,
implementation
,
strings
2300
x118
1488G
Painting Numbers
*special problem
,
data structures
,
greedy
,
number theory
2500
x117
72F
Oil
*special problem
,
greedy
,
math
1900
x116
64G
Path Canonization
*special problem
2200
x116
1769D3
Игра в Девятку III
*special problem
,
brute force
2300
x115
1170F
Wheels
*special problem
,
binary search
,
greedy
x115
409I
Feed the Golorp
*special problem
2400
x115
1297F
Movie Fan
*special problem
,
data structures
,
greedy
,
implementation
,
sortings
x113
100G
Name the album
*special problem
,
data structures
,
implementation
1800
x109
64H
Table Bowling
*special problem
,
sortings
2300
x109
774F
Pens And Days Of Week
*special problem
,
binary search
,
number theory
2700
x104
1402B
Roads
*special problem
,
geometry
,
sortings
2900
x102
774I
Composing Of String
*special problem
,
dp
2300
x100
530F
Jumping frogs
*special problem
2100
x97
470F
Pairwise Sums
*special problem
2300
x96
683H
Exchange of Books
*special problem
1900
x95
1275F
Шардирование постов
*special problem
,
binary search
,
interactive
x91
470G
Hamming Distance
*special problem
2300
x90
162J
Brackets
*special problem
1800
x88
1533G
Biome Map
*special problem
,
constructive algorithms
,
dfs and similar
,
graphs
x86
64I
Sort the Table
*special problem
,
sortings
2400
x84
1533H
Submatrices
*special problem
,
bitmasks
,
data structures
,
dp
x80
1940A
Parallel Universes
*special problem
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
x78
661E
Divisibility Check
*special problem
2000
x78
1910H
Sum of Digits of Sums
*special problem
,
binary search
,
data structures
2400
x77
153D
Date Change
*special problem
2000
x77
345D
Chain Letter
*special problem
,
dfs and similar
,
graphs
2200
x75
72B
INI-file
*special problem
,
implementation
2200
x75
100H
Battleship
*special problem
,
dfs and similar
,
implementation
2100
x74
153E
Euclidean Distance
*special problem
2100
x72
72D
Perse-script
*special problem
,
expression parsing
2300
x72
1571G
A Battle Against a Dragon
*special problem
,
data structures
,
dp
2500
x71
162I
Truncatable primes
*special problem
2000
x71
1170G
Graph Decomposition
*special problem
,
graphs
x68
1211G
King's Path
*special problem
,
math
,
trees
2500
x66
1297G
M-numbers
*special problem
,
dp
,
math
x65
1431H
Rogue-like Game
*special problem
,
brute force
,
greedy
,
two pointers
2600
x64
661H
Rotate Matrix
*special problem
2400
x63
100J
Interval Coloring
*special problem
,
greedy
,
math
2400
x60
1939D
Big Persimmon
*special problem
,
dp
,
games
x59
1192A
Building Skyscrapers
*special problem
x59
1275E3
Контрольная сумма
*special problem
x56
162G
Non-decimal sum
*special problem
2000
x55
1571I
Physical Examination
*special problem
,
binary search
,
data structures
3200
x54
1488H
Build From Suffixes
*special problem
,
combinatorics
,
data structures
2800
x52
345G
Suffix Subgroup
*special problem
,
strings
2200
x51
661G
Hungarian Notation
*special problem
2200
x50
1910G
Pool Records
*special problem
,
greedy
2700
x49
1533I
Excursions
*special problem
,
constructive algorithms
,
dfs and similar
,
flows
,
graph matchings
,
graphs
x47
1346H
Game with Segments
*special problem
,
data structures
,
games
2700
x46
1571H
Laser Beams
*special problem
,
geometry
,
probabilities
2900
x44
1346I
Pac-Man 2.0
*special problem
,
dp
2900
x43
1170H
Longest Saw
*special problem
,
constructive algorithms
x43
530I
Different variables
*special problem
2500
x43
345F
Superstitions Inspection
*special problem
2700
x43
345E
Black Cat Rush
*special problem
2700
x43
1910J
Two Colors
*special problem
2900
x42
1431J
Zero-XOR Array
*special problem
,
dp
3400
x42
1431I
Cyclic Shifts
*special problem
,
strings
2900
x42
1403C
Chess Rush
*special problem
,
combinatorics
,
dp
,
implementation
,
math
3200
x42
1533J
Pawns
*special problem
x41
1211H
Road Repair in Treeland
*special problem
,
binary search
,
dp
,
trees
3100
x41
1297H
Paint the String
*special problem
,
dp
,
strings
x40
683J
The Hero with Bombs
*special problem
3000
x40
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