Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round 968 (Div. 2)
36:13:57
Register now »
*has extra registration
→ Filter Problems
Difficulty:
—
dp
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
Add tag
Main
acmsguru
|
Problems
Submit
Status
Standings
Custom test
Problems
#
Name
1832E
Combinatorics Problem
brute force
,
combinatorics
,
dp
2200
x2135
1830F
The Third Grace
data structures
,
dp
3200
x242
1830D
Mex Tree
brute force
,
dp
,
trees
2800
x651
1827C
Palindrome Partition
binary search
,
brute force
,
data structures
,
dp
,
hashing
,
strings
2600
x1182
1827B2
Range Sorting (Hard Version)
binary search
,
data structures
,
dp
,
greedy
2400
x1842
1827B1
Range Sorting (Easy Version)
binary search
,
dp
,
dsu
,
greedy
,
trees
,
two pointers
2000
x3819
1826E
Walk the Runway
bitmasks
,
brute force
,
data structures
,
dp
,
graphs
,
implementation
,
sortings
2400
x1571
1824C
LuoTianyi and XOR-Tree
data structures
,
dfs and similar
,
dp
,
dsu
,
greedy
,
trees
2500
x1367
1823F
Random Walk
dp
,
graphs
,
math
,
probabilities
,
trees
2600
x848
1823E
Removing Graph
brute force
,
dp
,
games
,
graphs
,
math
2500
x1216
1821F
Timber
combinatorics
,
dp
,
fft
,
math
2600
x734
1821E
Rearrange Brackets
brute force
,
dp
,
greedy
,
sortings
,
strings
2100
x2338
1819F
Willy-nilly, Crack, Into Release!
data structures
,
dp
3500
x129
1819D
Misha and Apples
brute force
,
data structures
,
dp
,
two pointers
2800
x622
1819C
The Fox and the Complete Tree Traversal
constructive algorithms
,
dp
,
implementation
,
math
,
trees
2400
x1441
1815E
Bosco and Particle
dp
,
math
,
number theory
,
strings
3100
x337
1815D
XOR Counting
bitmasks
,
combinatorics
,
dp
,
math
2600
x1111
1814E
Chain Chips
data structures
,
dp
,
matrices
2300
x1308
1811G2
Vlad and the Nice Paths (hard version)
binary search
,
combinatorics
,
data structures
,
dp
,
math
,
two pointers
2200
x1713
1811G1
Vlad and the Nice Paths (easy version)
combinatorics
,
dp
,
math
2100
x2030
1810G
The Maximum Prefix
dp
3200
x692
1809G
Prediction
combinatorics
,
dp
,
math
2800
x435
1809E
Two Tanks
binary search
,
dp
,
implementation
,
math
2400
x820
1808E3
Minibuses on Venus (hard version)
brute force
,
combinatorics
,
dp
,
math
2800
x432
1808E2
Minibuses on Venus (medium version)
combinatorics
,
divide and conquer
,
dp
,
matrices
2500
x677
1808E1
Minibuses on Venus (easy version)
combinatorics
,
divide and conquer
,
dp
2200
x1310
1808C
Unlucky Numbers
brute force
,
dp
,
greedy
,
implementation
1900
x3733
1806D
DSU Master
combinatorics
,
dp
,
dsu
,
math
2500
x876
1805E
There Should Be a Lot of Maximums
brute force
,
data structures
,
dfs and similar
,
dp
,
trees
,
two pointers
2300
x1584
1805D
A Wide, Wide Graph
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
1800
x6410
1804H
Code Lock
bitmasks
,
dp
3300
x182
1804E
Routing
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
2400
x1414
1804D
Accommodation
brute force
,
dp
,
greedy
,
implementation
2000
x4570
1801F
Another n-dimensional chocolate bar
dp
,
math
,
meet-in-the-middle
,
number theory
2700
x568
1801D
The way home
binary search
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x2155
1801C
Music Festival
binary search
,
data structures
,
dp
,
greedy
,
sortings
1900
x3370
1799H
Tree Cutting
bitmasks
,
dfs and similar
,
dp
3200
x278
1799G
Count Voting
combinatorics
,
dp
,
math
2600
x738
1799F
Halve or Subtract
binary search
,
brute force
,
dp
,
greedy
,
sortings
2700
x808
1799D2
Hot Start Up (hard version)
data structures
,
dp
2100
x2410
1799D1
Hot Start Up (easy version)
dp
1900
x4377
1798F
Gifts from Grandfather Ahmed
dp
,
math
,
number theory
2500
x483
1798E
Multitest Generator
brute force
,
dp
2300
x1568
1797D
Li Hua and Tree
brute force
,
data structures
,
dfs and similar
,
dp
,
implementation
,
trees
1900
x3893
1796E
Colored Subgraphs
dfs and similar
,
dp
,
games
,
greedy
,
trees
2500
x740
1796D
Maximum Subarray
data structures
,
dp
,
greedy
,
two pointers
2000
x4200
1795E
Explosions?
binary search
,
data structures
,
dp
,
greedy
,
math
2200
x1988
1794E
Labeling the Tree with Distances
data structures
,
dp
,
greedy
,
hashing
,
implementation
,
trees
2400
x1065
1794D
Counting Factorizations
combinatorics
,
divide and conquer
,
dp
,
math
,
number theory
1900
x3516
1793E
Velepin and Marketing
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2600
x965
1793D
Moscow Gorillas
binary search
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1800
x6022
1792F2
Graph Coloring (hard version)
brute force
,
combinatorics
,
divide and conquer
,
dp
,
fft
,
graphs
2900
x382
1792F1
Graph Coloring (easy version)
combinatorics
,
dp
,
graphs
2700
x701
1792E
Divisors and Table
brute force
,
dfs and similar
,
dp
,
number theory
2400
x1370
1789F
Serval and Brain Power
bitmasks
,
brute force
,
dp
,
greedy
,
implementation
,
strings
2700
x700
1789E
Serval and Music Game
brute force
,
dp
,
implementation
,
math
,
number theory
2500
x801
1788E
Sum Over Zero
data structures
,
dfs and similar
,
dp
2200
x2622
1787H
Codeforces Scoreboard
binary search
,
data structures
,
dp
,
geometry
3300
x225
1784E
Infinite Game
brute force
,
combinatorics
,
dp
,
games
,
probabilities
3100
x316
1784D
Wooden Spoon
combinatorics
,
dp
2400
x995
1783D
Different Arrays
brute force
,
dp
,
implementation
2000
x4353
1781F
Bracket Insertion
combinatorics
,
dp
,
math
,
trees
2700
x834
1780F
Three Chairs
bitmasks
,
brute force
,
combinatorics
,
data structures
,
dp
,
number theory
,
sortings
2300
x1440
1779F
Xorcerer's Stones
bitmasks
,
constructive algorithms
,
dp
,
trees
2500
x1251
1778F
Maximizing Root
dfs and similar
,
dp
,
graphs
,
math
,
number theory
,
trees
2600
x638
1778D
Flexible String Revisit
combinatorics
,
dp
,
math
,
probabilities
2100
x2695
1777D
Score of a Tree
bitmasks
,
combinatorics
,
dfs and similar
,
dp
,
math
,
probabilities
,
trees
1900
x3420
1776M
Parmigiana With Seafood
binary search
,
dp
,
greedy
,
trees
3000
x367
1776K
Uniform Chemistry
dp
,
math
3200
x65
1776E
Crossing the Railways
data structures
,
dp
3500
x68
1776B
Vittorio Plays with LEGO Bricks
dp
,
geometry
2200
x1308
1775F
Laboratory on Pluto
constructive algorithms
,
dp
,
greedy
,
math
2500
x757
1774G
Segment Covering
brute force
,
combinatorics
,
constructive algorithms
,
data structures
,
dp
,
trees
3200
x435
1774E
Two Chess Pieces
dfs and similar
,
dp
,
greedy
,
trees
1900
x3443
1773L
Lisa's Sequences
dp
3500
x41
1773G
Game of Questions
bitmasks
,
combinatorics
,
dp
,
fft
,
math
,
probabilities
2800
x354
1771E
Hossam and a Letter
brute force
,
dp
,
implementation
,
two pointers
2500
x680
1771D
Hossam and (sub-)palindromic tree
brute force
,
data structures
,
dfs and similar
,
dp
,
strings
,
trees
2100
x2713
1770F
Koxia and Sequence
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
3100
x656
1770E
Koxia and Tree
combinatorics
,
dfs and similar
,
dp
,
dsu
,
math
,
probabilities
,
trees
2400
x1338
1769D1
Игра в Девятку I
*special problem
,
brute force
,
dp
1800
x375
1768F
Wonderful Jump
dp
,
greedy
2900
x821
1767E
Algebra Flash
bitmasks
,
brute force
,
dp
,
graphs
,
math
,
meet-in-the-middle
,
trees
2500
x891
1767C
Count Binary Strings
data structures
,
dp
2100
x2607
1766E
Decomposition
binary search
,
brute force
,
data structures
,
divide and conquer
,
dp
,
two pointers
2300
x1167
1765F
Chemistry Lab
dp
,
geometry
,
probabilities
2200
x592
1765C
Card Guessing
combinatorics
,
dp
,
probabilities
2600
x380
1764E
Doremy's Number Line
dp
,
greedy
,
sortings
2400
x1214
1764D
Doremy's Pegging Game
combinatorics
,
dp
,
math
2000
x2724
1763F
Edge Queries
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
trees
3000
x470
1763E
Node Pairs
dp
,
graphs
,
math
,
number theory
2200
x1773
1763D
Valid Bitonic Permutations
combinatorics
,
dp
,
implementation
,
math
,
number theory
2200
x2009
1762F
Good Pairs
binary search
,
data structures
,
dp
2600
x594
1761F2
Anti-median (Hard Version)
combinatorics
,
dp
,
math
3500
x80
1761F1
Anti-median (Easy Version)
dp
,
math
3100
x205
1753C
Wish I Knew How to Sort
dp
,
math
,
probabilities
2000
x4338
1750H
BinaryStringForces
constructive algorithms
,
data structures
,
dp
3500
x81
1750G
Doping
combinatorics
,
dp
,
math
3300
x243
1750F
Majority
combinatorics
,
dp
,
math
,
strings
2700
x898
1750E
Bracket Cost
binary search
,
data structures
,
divide and conquer
,
dp
,
greedy
,
strings
2400
x1393
←
1
2
3
4
5
...
16
17
→
User lists
Name