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Before contest
CodeCraft-22 and Codeforces Round #795 (Div. 2)
4 days
→ Filter Problems
Difficulty:
—
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
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Status
Standings
Custom test
Problems
#
Name
1669H
Maximal AND
bitmasks
,
greedy
,
math
1300
x9153
1669G
Fall Down
dfs and similar
,
implementation
1200
x10427
1669F
Eating Candies
binary search
,
data structures
,
greedy
,
two pointers
1100
x12963
1669E
2-Letter Strings
data structures
,
math
,
strings
1200
x10292
1669D
Colorful Stamp
implementation
1100
x14163
1669C
Odd/Even Increments
greedy
,
greedy
,
implementation
,
math
800
x21790
1669B
Triple
implementation
,
sortings
800
x23270
1669A
Division?
implementation
800
x28011
1668B
Social Distance
greedy
,
math
,
sortings
900
x12142
1668A
Direction Change
implementation
,
math
800
x13724
1667F
Yin Yang
implementation
3500
x31
1667E
Centroid Probabilities
combinatorics
,
dp
,
fft
,
math
3000
x274
1667D
Edge Elimination
constructive algorithms
,
dfs and similar
,
dp
,
trees
2900
x315
1667C
Half Queen Cover
constructive algorithms
,
math
2400
x929
1667B
Optimal Partition
data structures
,
dp
2100
x2302
1667A
Make it Increasing
brute force
,
greedy
,
math
1300
x9901
1666L
Labyrinth
dfs and similar
,
graphs
1800
x1837
1666K
Kingdom Partition
flows
3200
x62
1666J
Job Lookup
constructive algorithms
,
dp
,
shortest paths
,
trees
2100
x828
1666I
Interactive Treasure Hunt
brute force
,
constructive algorithms
,
geometry
,
interactive
,
math
2200
x906
1666H
Heroes of Might
math
3500
x24
1666G
Global Warming
geometry
,
math
3100
x85
1666F
Fancy Stack
combinatorics
,
dp
,
implementation
2200
x636
1666E
Even Split
binary search
,
constructive algorithms
,
greedy
,
math
2500
x404
1666D
Deletive Editing
greedy
900
x3831
1666C
Connect the Points
brute force
,
constructive algorithms
,
geometry
1800
x1992
1666B
Budget Distribution
3300
x22
1666A
Admissible Map
3300
x55
1665E
MinimizOR
bitmasks
,
brute force
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
two pointers
2500
x916
1665D
GCD Guess
bitmasks
,
chinese remainder theorem
,
constructive algorithms
,
games
,
interactive
,
math
,
number theory
2000
x2428
1665C
Tree Infection
binary search
,
greedy
,
sortings
,
trees
1600
x5482
1665B
Array Cloning Technique
constructive algorithms
,
greedy
,
sortings
900
x14215
1665A
GCD vs LCM
constructive algorithms
,
math
800
x18552
1663H
Cross-Language Program
constructive algorithms
x993
1663G
Six Characters
constructive algorithms
,
strings
x115
1663F
In Every Generation...
strings
x222
1663E
Are You Safe?
implementation
x385
1663D
Is it rated - 3
combinatorics
,
dp
,
math
x1033
1663C
Pōja Verdon
implementation
,
math
x4806
1663B
Mike's Sequence
divide and conquer
,
implementation
,
math
x2574
1663A
Who Tested?
expression parsing
,
trees
x8545
1662O
Circular Maze
brute force
,
dfs and similar
,
graphs
,
implementation
x582
1662N
Drone Photo
combinatorics
,
math
,
sortings
x252
1662M
Bottle Arrangements
constructive algorithms
x1749
1662L
Il Derby della Madonnina
data structures
,
dp
,
math
x453
1662K
Pandemic Restrictions
geometry
,
ternary search
x136
1662J
Training Camp
flows
,
graphs
x35
1662I
Ice Cream Shop
brute force
,
implementation
,
sortings
x891
1662H
Boundary
brute force
,
math
x1364
1662G
Gastronomic Event
dp
,
greedy
,
trees
x222
1662F
Antennas
data structures
,
dfs and similar
,
graphs
,
graphs
,
implementation
,
implementation
,
shortest paths
,
shortest paths
x403
1662E
Round Table
math
x50
1662D
Evolution of Weasels
greedy
,
implementation
,
strings
x708
1662C
European Trip
dp
,
graphs
,
math
,
matrices
x150
1662B
Toys
greedy
,
strings
x93
1662A
Organizing SWERC
brute force
,
implementation
x2459
1661F
Teleporters
binary search
,
greedy
2600
x331
1661E
Narrow Components
brute force
,
data structures
,
dp
,
dsu
,
math
,
trees
2500
x619
1661D
Progressions Covering
data structures
,
greedy
1900
x3039
1661C
Water the Trees
binary search
,
greedy
,
math
1700
x6169
1661B
Getting Zero
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1300
x11199
1661A
Array Balancing
greedy
,
math
800
x15662
1660F2
Promising String (hard version)
data structures
,
implementation
,
math
,
strings
2100
x1793
1660F1
Promising String (easy version)
brute force
,
implementation
,
math
,
strings
1700
x5069
1660E
Matrix and Shifts
brute force
,
constructive algorithms
,
greedy
,
implementation
1600
x4761
1660D
Maximum Product Strikes Back
brute force
,
implementation
,
math
,
two pointers
1600
x5456
1660C
Get an Even String
dp
,
greedy
,
strings
1300
x12900
1660B
Vlad and Candies
math
800
x22092
1660A
Vasya and Coins
greedy
,
math
800
x26931
1659F
Tree and Permutation Game
dfs and similar
,
games
,
graphs
,
trees
3000
x78
1659E
AND-MEX Walk
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2200
x876
1659D
Reverse Sort Sum
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
,
two pointers
1900
x2580
1659C
Line Empire
binary search
,
brute force
,
dp
,
greedy
,
implementation
,
math
1500
x6107
1659B
Bit Flipping
bitmasks
,
constructive algorithms
,
greedy
,
strings
1300
x7301
1659A
Red Versus Blue
constructive algorithms
,
greedy
,
implementation
,
math
1000
x11731
1658F
Juju and Binary String
brute force
,
constructive algorithms
,
greedy
,
math
2700
x485
1658E
Gojou and Matrix Game
data structures
,
dp
,
games
,
hashing
,
implementation
,
math
,
number theory
,
sortings
2500
x682
1658D2
388535 (Hard Version)
bitmasks
,
brute force
,
data structures
,
math
2300
x1749
1658D1
388535 (Easy Version)
bitmasks
,
math
1600
x6365
1658C
Shinju and the Lost Permutation
constructive algorithms
,
math
1700
x7222
1658B
Marin and Anti-coprime Permutation
combinatorics
,
math
,
number theory
800
x15615
1658A
Marin and Photoshoot
constructive algorithms
,
implementation
,
math
800
x17734
1657F
Words on Tree
2-sat
,
dfs and similar
,
dsu
,
graphs
,
trees
2600
x358
1657E
Star MST
combinatorics
,
dp
,
graph matchings
,
math
2200
x1190
1657D
For Gamers. By Gamers.
binary search
,
brute force
,
greedy
,
math
,
sortings
2000
x3755
1657C
Bracket Sequence Deletion
greedy
,
implementation
1200
x13224
1657B
XY Sequence
greedy
800
x19787
1657A
Integer Moves
brute force
,
math
800
x20481
1656I
Neighbour Ordering
constructive algorithms
,
graphs
3500
x28
1656H
Equal LCM Subsets
data structures
,
math
,
number theory
3200
x174
1656G
Cycle Palindrome
constructive algorithms
,
graphs
,
math
3200
x154
1656F
Parametric MST
binary search
,
constructive algorithms
,
graphs
,
greedy
,
math
,
sortings
2600
x669
1656E
Equal Tree Sums
constructive algorithms
,
dfs and similar
,
math
,
trees
2200
x2320
1656D
K-good
constructive algorithms
,
math
,
number theory
1900
x4864
1656C
Make Equal With Mod
constructive algorithms
,
math
,
number theory
,
sortings
1200
x12745
1656B
Subtract Operation
data structures
,
greedy
,
math
,
two pointers
1100
x13329
1656A
Good Pairs
math
,
sortings
800
x16568
1654H
Three Minimums
combinatorics
,
constructive algorithms
,
divide and conquer
,
dp
,
fft
,
math
3500
x38
1654G
Snowy Mountain
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
2900
x170
1654F
Minimal String Xoration
bitmasks
,
data structures
,
divide and conquer
,
greedy
,
hashing
,
sortings
,
strings
2800
x603
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