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Before contest
Codeforces Round 941 (Div. 1)
19:56:42
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Before contest
Codeforces Round 941 (Div. 2)
19:56:42
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2-sat
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bitmasks
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combinatorics
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data structures
dfs and similar
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expression parsing
fft
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geometry
graph matchings
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greedy
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interactive
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Problems
#
Name
1847A
The Man who became a God
greedy
,
sortings
800
x21628
1846C
Rudolf and the Another Competition
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1200
x17871
1844F2
Min Cost Permutation (Hard Version)
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
,
sortings
2800
x367
1843A
Sasha and Array Coloring
greedy
,
sortings
,
two pointers
800
x32861
1842F
Tenzing and Tree
dfs and similar
,
greedy
,
shortest paths
,
sortings
,
trees
2500
x1237
1841F
Monocarp and a Strategic Game
geometry
,
sortings
,
two pointers
2700
x469
1841D
Pairs of Segments
data structures
,
greedy
,
sortings
,
two pointers
2000
x4115
1840D
Wooden Toy Festival
binary search
,
greedy
,
sortings
1400
x12700
1839D
Ball Sorting
data structures
,
dp
,
sortings
2100
x2166
1839B
Lamps
greedy
,
sortings
1100
x14445
1836A
Destroyer
implementation
,
sortings
800
x19751
1834D
Survey in Class
brute force
,
data structures
,
greedy
,
implementation
,
sortings
1900
x4335
1833F
Ira and Flamenco
combinatorics
,
constructive algorithms
,
data structures
,
implementation
,
math
,
sortings
,
two pointers
1700
x6621
1833B
Restore the Weather
greedy
,
sortings
900
x25299
1832B
Maximum Sum
brute force
,
sortings
,
two pointers
1100
x19501
1830C
Hyperregular Bracket Strings
combinatorics
,
greedy
,
hashing
,
math
,
number theory
,
sortings
2400
x1512
1827A
Counting Orders
combinatorics
,
math
,
sortings
,
two pointers
1100
x17384
1826E
Walk the Runway
bitmasks
,
brute force
,
data structures
,
dp
,
graphs
,
implementation
,
sortings
2400
x1493
1826A
Trust Nobody
brute force
,
greedy
,
implementation
,
sortings
1200
x14464
1823B
Sort with Step
brute force
,
math
,
sortings
900
x15276
1822B
Karina and Array
greedy
,
math
,
sortings
800
x24022
1821E
Rearrange Brackets
brute force
,
dp
,
greedy
,
sortings
,
strings
2100
x2230
1819B
The Butcher
geometry
,
greedy
,
implementation
,
sortings
,
two pointers
1900
x3413
1814C
Search in Parallel
constructive algorithms
,
greedy
,
sortings
1500
x10133
1810F
M-tree
data structures
,
math
,
sortings
,
trees
2800
x533
1810C
Make It Permutation
brute force
,
greedy
,
sortings
1300
x13744
1808B
Playing in a Casino
math
,
sortings
1200
x14553
1807G2
Subsequence Addition (Hard Version)
bitmasks
,
dp
,
greedy
,
implementation
,
sortings
1100
x17594
1807G1
Subsequence Addition (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
sortings
1100
x17778
1806F2
GCD Master (hard version)
greedy
,
math
,
sortings
2900
x265
1806F1
GCD Master (easy version)
greedy
,
math
,
number theory
,
sortings
2900
x328
1805F2
Survival of the Weakest (hard version)
greedy
,
math
,
sortings
,
two pointers
3100
x319
1805F1
Survival of the Weakest (easy version)
binary search
,
brute force
,
implementation
,
math
,
sortings
2600
x807
1801D
The way home
binary search
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x2032
1801C
Music Festival
binary search
,
data structures
,
dp
,
greedy
,
sortings
1900
x3199
1801B
Buying gifts
data structures
,
greedy
,
sortings
1800
x5774
1799F
Halve or Subtract
binary search
,
brute force
,
dp
,
greedy
,
sortings
2700
x765
1798A
Showstopper
greedy
,
implementation
,
sortings
800
x19313
1793E
Velepin and Marketing
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2600
x923
1792D
Fixed Prefix Permutations
binary search
,
bitmasks
,
data structures
,
hashing
,
math
,
sortings
1700
x5859
1792A
GamingForces
greedy
,
sortings
800
x27091
1791G2
Teleporters (Hard Version)
binary search
,
greedy
,
sortings
1900
x4446
1791G1
Teleporters (Easy Version)
greedy
,
sortings
1100
x20375
1791E
Negatives and Positives
dp
,
greedy
,
sortings
1100
x25412
1790D
Matryoshkas
data structures
,
greedy
,
sortings
1200
x18065
1786B
Cake Assembly Line
brute force
,
sortings
1300
x8586
1783C
Yet Another Tournament
binary search
,
greedy
,
sortings
1700
x8758
1783A
Make it Beautiful
constructive algorithms
,
math
,
sortings
800
x27096
1781C
Equal Frequencies
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
,
strings
1600
x7013
1781B
Going to the Cinema
brute force
,
greedy
,
sortings
1000
x13196
1780F
Three Chairs
bitmasks
,
brute force
,
combinatorics
,
data structures
,
dp
,
number theory
,
sortings
2300
x1368
1779E
Anya's Simultaneous Exhibition
constructive algorithms
,
graphs
,
greedy
,
interactive
,
sortings
2400
x1684
1779D
Boris and His Amazing Haircut
constructive algorithms
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1700
x7459
1777C
Quiz Master
binary search
,
math
,
number theory
,
sortings
,
two pointers
1700
x7672
1776C
Library game
games
,
greedy
,
interactive
,
sortings
2500
x751
1773E
Easy Assembly
greedy
,
sortings
1400
x4634
1772G
Gaining Rating
binary search
,
greedy
,
implementation
,
math
,
sortings
,
two pointers
2200
x1261
1772F
Copy of a Copy of a Copy
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
,
sortings
2000
x2217
1771A
Hossam and Combinatorics
combinatorics
,
math
,
sortings
900
x21985
1768C
Elemental Decompress
constructive algorithms
,
greedy
,
implementation
,
sortings
1300
x13521
1767B
Block Towers
data structures
,
greedy
,
sortings
800
x19552
1764F
Doremy's Experimental Tree
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
sortings
,
trees
2500
x876
1764E
Doremy's Number Line
dp
,
greedy
,
sortings
2400
x1176
1763B
Incinerate
binary search
,
brute force
,
data structures
,
implementation
,
math
,
sortings
1200
x13859
1762G
Unequal Adjacent Elements
constructive algorithms
,
sortings
3100
x97
1762B
Make Array Good
constructive algorithms
,
implementation
,
number theory
,
sortings
1100
x16155
1760F
Quests
binary search
,
greedy
,
sortings
1500
x11240
1760C
Advantage
data structures
,
implementation
,
sortings
800
x34817
1760A
Medium Number
implementation
,
sortings
800
x53214
1759E
The Humanoid
brute force
,
dp
,
sortings
1500
x9886
1746G
Olympiad Training
binary search
,
data structures
,
dp
,
flows
,
geometry
,
implementation
,
sortings
3500
x88
1746D
Paths on the Tree
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
1900
x4413
1744D
Divisibility by 2^n
greedy
,
math
,
sortings
1200
x20166
1742G
Orray
bitmasks
,
brute force
,
greedy
,
math
,
sortings
1500
x9765
1742B
Increasing
greedy
,
implementation
,
sortings
800
x44104
1741F
Multi-Colored Segments
binary search
,
data structures
,
math
,
sortings
2000
x2212
1741D
Masha and a Beautiful Tree
dfs and similar
,
divide and conquer
,
graphs
,
sortings
,
trees
1300
x14403
1740G
Dangerous Laser Power
constructive algorithms
,
dsu
,
sortings
3100
x177
1740C
Bricks and Bags
constructive algorithms
,
games
,
greedy
,
sortings
1400
x10532
1740B
Jumbo Extra Cheese 2
geometry
,
greedy
,
sortings
800
x13530
1738B
Prefix Sum Addicts
constructive algorithms
,
greedy
,
math
,
sortings
1200
x14717
1738A
Glory Addicts
greedy
,
implementation
,
sortings
800
x13319
1736A
Make A Equal to B
brute force
,
greedy
,
sortings
800
x22398
1734A
Select Three Sticks
brute force
,
greedy
,
sortings
800
x20705
1733C
Parity Shuffle Sorting
constructive algorithms
,
sortings
1300
x15058
1733A
Consecutive Sum
greedy
,
sortings
800
x20641
1730C
Minimum Notation
data structures
,
greedy
,
math
,
sortings
1200
x16020
1730A
Planets
data structures
,
greedy
,
sortings
800
x22485
1729D
Friends and the Restaurant
greedy
,
sortings
,
two pointers
1200
x18741
1728C
Digital Logarithm
data structures
,
greedy
,
sortings
1400
x15036
1728A
Colored Balls: Revisited
brute force
,
greedy
,
implementation
,
sortings
800
x24325
1726G
A Certain Magical Party
combinatorics
,
data structures
,
greedy
,
sortings
3300
x282
1725F
Field Photography
bitmasks
,
data structures
,
sortings
2100
x935
1725B
Basketball Together
binary search
,
greedy
,
sortings
1000
x11578
1722D
Line
greedy
,
sortings
1100
x22158
1721D
Maximum AND
bitmasks
,
dfs and similar
,
divide and conquer
,
greedy
,
sortings
1800
x6275
1720B
Interesting Sum
brute force
,
data structures
,
greedy
,
math
,
sortings
800
x20732
1713B
Optimal Reduction
constructive algorithms
,
sortings
1000
x20706
1712C
Sort Zero
greedy
,
sortings
1100
x19185
1707C
DFS Trees
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2400
x1381
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