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Before contest
Codeforces Round 974 (Div. 3)
00:38:58
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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
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Status
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Custom test
Problems
#
Name
1796A
Typical Interview Problem
brute force
,
implementation
,
strings
800
x18819
1795A
Two Towers
brute force
,
implementation
,
strings
800
x23561
1794A
Prefix and Suffix Array
strings
800
x17111
1793A
Yet Another Promotion
greedy
,
math
800
x18009
1792A
GamingForces
greedy
,
sortings
800
x28025
1791C
Prepend and Append
implementation
,
two pointers
800
x44908
1791B
Following Directions
geometry
,
implementation
800
x44005
1791A
Codeforces Checking
implementation
,
strings
800
x59978
1790B
Taisia and Dice
greedy
,
greedy
,
math
800
x27329
1790A
Polycarp and the Day of Pi
implementation
,
math
,
strings
800
x36909
1789B
Serval and Inversion Magic
brute force
,
implementation
,
strings
,
two pointers
800
x16140
1789A
Serval and Mocha's Array
brute force
,
math
,
number theory
800
x18945
1788A
One and Two
brute force
,
implementation
,
math
800
x30434
1787A
Exponential Equation
constructive algorithms
,
math
800
x19144
1786A2
Alternating Deck (hard version)
implementation
800
x11394
1786A1
Non-alternating Deck (easy version)
implementation
800
x14023
1783A
Make it Beautiful
constructive algorithms
,
math
,
sortings
800
x29983
1781A
Parallel Projection
geometry
,
math
800
x15055
1780A
Hayato and School
constructive algorithms
,
greedy
800
x21663
1779A
Hall of Fame
constructive algorithms
,
greedy
,
strings
800
x23116
1778A
Flip Flop Sum
greedy
,
implementation
800
x24248
1777A
Everybody Likes Good Arrays!
greedy
,
math
800
x24172
1776A
Walking Boy
greedy
800
x6959
1775A1
Gardener and the Capybaras (easy version)
brute force
,
constructive algorithms
,
implementation
800
x19632
1774A
Add Plus Minus Sign
constructive algorithms
,
math
800
x22366
1773F
Football
constructive algorithms
800
x4083
1772B
Matrix Rotation
brute force
,
implementation
800
x29076
1772A
A+B?
implementation
800
x47327
1769A
Узкая дорога
*special problem
,
math
800
x1946
1768A
Greatest Convex
greedy
,
math
,
number theory
800
x28826
1767B
Block Towers
data structures
,
greedy
,
sortings
800
x20292
1767A
Cut the Triangle
implementation
800
x20521
1766A
Extremely Round
brute force
,
implementation
800
x26345
1765B
Broken Keyboard
greedy
800
x8962
1764A
Doremy's Paint
greedy
800
x16575
1763A
Absolute Maximization
bitmasks
,
constructive algorithms
,
greedy
,
math
800
x15650
1762A
Divide and Conquer
greedy
,
math
,
number theory
800
x19011
1761A
Two Permutations
brute force
,
constructive algorithms
800
x19470
1760C
Advantage
data structures
,
implementation
,
sortings
800
x36866
1760B
Atilla's Favorite Problem
greedy
,
implementation
,
strings
800
x44214
1760A
Medium Number
implementation
,
sortings
800
x58598
1759B
Lost Permutation
math
800
x22178
1759A
Yes-Yes?
implementation
,
strings
800
x29860
1758A
SSeeeeiinngg DDoouubbllee
constructive algorithms
,
strings
800
x25128
1754B
Kevin and Permutation
constructive algorithms
,
greedy
,
math
800
x18870
1754A
Technical Support
greedy
800
x23069
1750B
Maximum Substring
brute force
,
greedy
,
implementation
800
x16212
1750A
Indirect Sort
constructive algorithms
,
implementation
,
math
800
x17038
1749A
Cowardly Rooks
greedy
,
implementation
800
x22307
1748A
The Ultimate Square
math
800
x24018
1747A
Two Groups
constructive algorithms
,
greedy
800
x24810
1746B
Rebellion
constructive algorithms
,
greedy
,
two pointers
800
x17119
1746A
Maxmina
constructive algorithms
,
greedy
800
x19790
1744B
Even-Odd Increments
implementation
,
math
800
x23437
1744A
Number Replacement
greedy
,
implementation
800
x27092
1743B
Permutation Value
constructive algorithms
,
greedy
800
x22180
1743A
Password
brute force
,
combinatorics
,
implementation
,
math
800
x26684
1742B
Increasing
greedy
,
implementation
,
sortings
800
x47419
1742A
Sum
implementation
800
x71235
1741B
Funny Permutation
constructive algorithms
,
math
800
x25342
1741A
Compare T-Shirt Sizes
implementation
,
implementation
,
strings
800
x30747
1740B
Jumbo Extra Cheese 2
geometry
,
greedy
,
sortings
800
x13727
1740A
Factorise N+M
constructive algorithms
,
number theory
800
x20108
1739A
Immobile Knight
implementation
800
x22608
1738A
Glory Addicts
greedy
,
implementation
,
sortings
800
x13500
1736A
Make A Equal to B
brute force
,
greedy
,
sortings
800
x22740
1735A
Working Week
constructive algorithms
,
greedy
,
math
800
x20181
1734B
Bright, Nice, Brilliant
constructive algorithms
800
x15758
1734A
Select Three Sticks
brute force
,
greedy
,
sortings
800
x21095
1733A
Consecutive Sum
greedy
,
sortings
800
x20881
1731A
Joey Takes Money
greedy
,
math
800
x22469
1730A
Planets
data structures
,
greedy
,
sortings
800
x22965
1729B
Decode String
greedy
,
strings
800
x30062
1729A
Two Elevators
math
800
x40302
1728B
Best Permutation
constructive algorithms
,
greedy
800
x20112
1728A
Colored Balls: Revisited
brute force
,
greedy
,
implementation
,
sortings
800
x24600
1725A
Accumulation of Dominoes
math
800
x9217
1722C
Word Game
data structures
,
implementation
800
x30810
1722B
Colourblindness
implementation
800
x45722
1722A
Spell Check
implementation
800
x50199
1721A
Image
greedy
,
implementation
800
x26964
1720B
Interesting Sum
brute force
,
data structures
,
greedy
,
math
,
sortings
800
x21131
1719B
Mathematical Circus
constructive algorithms
,
math
800
x18501
1719A
Chip Game
games
,
math
800
x25465
1717A
Madoka and Strange Thoughts
math
,
number theory
800
x19433
1716B
Permutation Chain
constructive algorithms
,
math
800
x21390
1716A
2-3 Moves
greedy
,
math
800
x32711
1715A
Crossmarket
constructive algorithms
,
greedy
,
math
800
x23496
1714C
Minimum Varied Number
greedy
800
x30938
1714B
Remove Prefix
data structures
,
greedy
,
implementation
800
x30162
1713A
Traveling Salesman Problem
geometry
,
greedy
,
implementation
800
x21968
1712B
Woeful Permutation
constructive algorithms
,
greedy
,
number theory
800
x21546
1712A
Wonderful Permutation
greedy
,
implementation
800
x24024
1711A
Perfect Permutation
constructive algorithms
800
x25120
1709A
Three Doors
brute force
,
greedy
,
implementation
,
math
800
x29548
1708A
Difference Operations
greedy
,
math
800
x21736
1706A
Another String Minimization Problem
2-sat
,
constructive algorithms
,
greedy
,
string suffix structures
,
strings
800
x22903
1705A
Mark the Photographer
greedy
,
sortings
800
x25220
1704A
Two 0-1 Sequences
constructive algorithms
,
greedy
800
x15982
1703C
Cypher
brute force
,
implementation
,
strings
800
x35385
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