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Before contest
Codeforces Round #850 (Div. 1, based on VK Cup 2022 - Final Round)
22:57:43
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*has extra registration
Before contest
Codeforces Round #850 (Div. 2, based on VK Cup 2022 - Final Round)
22:57:43
Register now »
*has extra registration
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constructive algorithms
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
1790G
Tokens on Graph
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
x543
1790E
Vlad and a Pair of Numbers
bitmasks
,
constructive algorithms
x8178
1787F
Inverse Transformation
constructive algorithms
,
implementation
,
math
2500
x438
1787E
The Harmonization of XOR
bitmasks
,
constructive algorithms
,
greedy
,
math
2100
x1365
1787A
Exponential Equation
constructive algorithms
,
math
800
x14444
1783B
Matrix of Differences
constructive algorithms
,
math
1100
x13919
1783A
Make it Beautiful
constructive algorithms
,
math
,
sortings
800
x21357
1781G
Diverse Coloring
constructive algorithms
,
trees
3200
x113
1781C
Equal Frequencies
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
,
strings
1600
x4920
1780D
Bit Guessing Game
binary search
,
bitmasks
,
constructive algorithms
,
interactive
x3035
1780A
Hayato and School
constructive algorithms
,
greedy
x17189
1779G
The Game of the Century
constructive algorithms
,
graphs
,
shortest paths
3000
x205
1779F
Xorcerer's Stones
bitmasks
,
constructive algorithms
,
dp
,
trees
2500
x943
1779E
Anya's Simultaneous Exhibition
constructive algorithms
,
graphs
,
greedy
,
interactive
,
sortings
2400
x1338
1779D
Boris and His Amazing Haircut
constructive algorithms
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1700
x5461
1779B
MKnez's ConstructiveForces Task
constructive algorithms
,
math
900
x18528
1779A
Hall of Fame
constructive algorithms
,
greedy
,
strings
800
x20411
1775F
Laboratory on Pluto
constructive algorithms
,
dp
,
greedy
,
math
2500
x532
1775B
Gardener and the Array
bitmasks
,
constructive algorithms
1300
x9032
1775A2
Gardener and the Capybaras (hard version)
constructive algorithms
,
greedy
900
x14417
1775A1
Gardener and the Capybaras (easy version)
brute force
,
constructive algorithms
,
implementation
800
x15815
1774H
Maximum Permutation
constructive algorithms
3500
x95
1774G
Segment Covering
brute force
,
combinatorics
,
constructive algorithms
,
data structures
,
dp
,
trees
3200
x174
1774D
Same Count One
brute force
,
constructive algorithms
,
greedy
,
implementation
,
two pointers
1600
x5430
1774C
Ice and Fire
constructive algorithms
,
dp
,
greedy
1300
x8935
1774B
Coloring
constructive algorithms
,
greedy
,
math
1500
x8291
1774A
Add Plus Minus Sign
constructive algorithms
,
math
800
x19228
1773K
King's Puzzle
constructive algorithms
1900
x973
1773J
Jumbled Trees
constructive algorithms
,
math
2900
x57
1773F
Football
constructive algorithms
800
x2840
1773A
Amazing Trick
constructive algorithms
,
graph matchings
,
math
,
probabilities
1900
x969
1772F
Copy of a Copy of a Copy
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
,
sortings
2000
x1457
1772D
Absolute Sorting
constructive algorithms
,
math
1400
x9285
1772C
Different Differences
constructive algorithms
,
greedy
,
math
1000
x17061
1771B
Hossam and Friends
binary search
,
constructive algorithms
,
dp
,
two pointers
1400
x8727
1770H
Koxia, Mahiru and Winter Festival
constructive algorithms
3500
x57
1770D
Koxia and Game
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
flows
,
games
,
graph matchings
,
graphs
,
implementation
2000
x2907
1770B
Koxia and Permutation
constructive algorithms
1000
x16046
1768D
Lucky Permutation
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
1800
x4864
1768C
Elemental Decompress
constructive algorithms
,
greedy
,
implementation
,
sortings
1300
x10219
1767D
Playoff
combinatorics
,
constructive algorithms
,
dp
,
greedy
,
math
1500
x7082
1765G
Guess the String
constructive algorithms
,
interactive
,
probabilities
2600
x224
1765D
Watch the Videos
binary search
,
constructive algorithms
,
two pointers
1700
x2434
1764F
Doremy's Experimental Tree
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
sortings
,
trees
2500
x690
1763C
Another Array Problem
brute force
,
constructive algorithms
,
greedy
2000
x4867
1763A
Absolute Maximization
bitmasks
,
constructive algorithms
,
greedy
,
math
800
x13187
1762G
Unequal Adjacent Elements
constructive algorithms
,
sortings
3100
x49
1762D
GCD Queries
constructive algorithms
,
interactive
,
number theory
2100
x2456
1762B
Make Array Good
constructive algorithms
,
implementation
,
number theory
,
sortings
1100
x12865
1761E
Make It Connected
binary search
,
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
matrices
,
trees
,
two pointers
2400
x1332
1761C
Set Construction
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
1400
x6881
1761B
Elimination of a Ring
constructive algorithms
,
greedy
,
implementation
1000
x10690
1761A
Two Permutations
brute force
,
constructive algorithms
800
x13486
1759G
Restore the Permutation
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
1900
x3000
1758F
Decent Division
constructive algorithms
,
data structures
3000
x95
1758D
Range = √Sum
binary search
,
brute force
,
constructive algorithms
,
math
,
two pointers
1800
x4906
1758B
XOR = Average
constructive algorithms
900
x16125
1758A
SSeeeeiinngg DDoouubbllee
constructive algorithms
,
strings
800
x20355
1754B
Kevin and Permutation
constructive algorithms
,
greedy
,
math
800
x16679
1753D
The Beach
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2400
x1191
1753A2
Make Nonzero Sum (hard version)
constructive algorithms
,
dp
,
greedy
1500
x7646
1753A1
Make Nonzero Sum (easy version)
constructive algorithms
,
dp
,
greedy
1300
x11395
1750H
BinaryStringForces
constructive algorithms
,
data structures
,
dp
3500
x43
1750C
Complementary XOR
constructive algorithms
,
implementation
1400
x7530
1750A
Indirect Sort
constructive algorithms
,
implementation
,
math
800
x15125
1749E
Cactus Wall
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2400
x1219
1748F
Circular Xor Reversal
bitmasks
,
constructive algorithms
3000
x247
1748D
ConstructOR
bitmasks
,
chinese remainder theorem
,
combinatorics
,
constructive algorithms
,
math
,
number theory
2100
x2178
1747D
Yet Another Problem
binary search
,
bitmasks
,
constructive algorithms
,
data structures
1900
x3627
1747B
BAN BAN
constructive algorithms
900
x17948
1747A
Two Groups
constructive algorithms
,
greedy
800
x21504
1746E1
Joking (Easy Version)
binary search
,
constructive algorithms
,
interactive
,
ternary search
2500
x1103
1746C
Permutation Operations
constructive algorithms
,
greedy
,
implementation
,
math
1300
x9911
1746B
Rebellion
constructive algorithms
,
greedy
,
two pointers
800
x14822
1746A
Maxmina
constructive algorithms
,
greedy
800
x17897
1743G
Antifibonacci Cut
bitmasks
,
combinatorics
,
constructive algorithms
,
data structures
,
dp
,
hashing
,
math
3000
x178
1743C
Save the Magazines
constructive algorithms
,
dp
,
greedy
1100
x15708
1743B
Permutation Value
constructive algorithms
,
greedy
800
x19772
1742F
Smaller
constructive algorithms
,
greedy
,
strings
1500
x7620
1741B
Funny Permutation
constructive algorithms
,
math
800
x21592
1740G
Dangerous Laser Power
constructive algorithms
,
dsu
,
sortings
3100
x133
1740E
Hanging Hearts
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
greedy
,
trees
1800
x3127
1740D
Knowledge Cards
constructive algorithms
,
data structures
1500
x6086
1740C
Bricks and Bags
constructive algorithms
,
games
,
greedy
,
sortings
1400
x8355
1740A
Factorise N+M
constructive algorithms
,
number theory
800
x16501
1739C
Card Game
combinatorics
,
constructive algorithms
,
dp
,
games
1500
x7126
1739B
Array Recovery
constructive algorithms
,
greedy
,
math
1100
x17227
1738G
Anti-Increasing Addicts
constructive algorithms
,
dp
,
greedy
,
math
2900
x284
1738F
Connectivity Addicts
constructive algorithms
,
dsu
,
graphs
,
greedy
,
interactive
,
shortest paths
,
trees
2400
x958
1738D
Permutation Addicts
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
trees
1900
x2802
1738B
Prefix Sum Addicts
constructive algorithms
,
greedy
,
math
,
sortings
1200
x11202
1737F
Ela and Prime GCD
constructive algorithms
,
math
,
number theory
3300
x92
1737C
Ela and Crickets
constructive algorithms
,
games
,
implementation
,
math
1500
x4651
1736D
Equal Binary Subsequences
constructive algorithms
,
geometry
,
greedy
,
implementation
,
strings
2200
x1989
1735E
House Planning
constructive algorithms
,
data structures
,
graph matchings
,
greedy
2400
x883
1735A
Working Week
constructive algorithms
,
greedy
,
math
800
x18203
1734E
Rectangular Congruence
constructive algorithms
,
number theory
2100
x2285
1734B
Bright, Nice, Brilliant
constructive algorithms
800
x14399
1733E
Conveyor
constructive algorithms
,
dp
,
math
2700
x869
1733D1
Zero-One (Easy Version)
constructive algorithms
,
greedy
,
math
1400
x10068
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