Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round 973 (Div. 2)
13:34:57
Register now »
*has extra registration
→ Filter Problems
Difficulty:
—
data structures
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
1860E
Fast Travel Text Editor
data structures
,
dfs and similar
,
graphs
,
shortest paths
2400
x1392
1860C
Game on Permutation
data structures
,
dp
,
games
,
greedy
1400
x13238
1859F
Teleportation in Byteland
data structures
,
dfs and similar
,
divide and conquer
,
graphs
,
shortest paths
,
trees
3200
x397
1859D
Andrey and Escape from Capygrad
binary search
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1800
x6955
1858E2
Rollbacks (Hard Version)
data structures
,
interactive
,
trees
2600
x1059
1858E1
Rollbacks (Easy Version)
brute force
,
data structures
,
dfs and similar
,
trees
2500
x1321
1858D
Trees and Segments
brute force
,
data structures
,
dp
,
greedy
,
two pointers
2200
x2810
1857F
Sum and Product
binary search
,
data structures
,
math
1600
x11424
1856C
To Become Max
binary search
,
brute force
,
data structures
,
dp
1600
x12228
1852F
Panda Meetups
data structures
,
dp
,
flows
3500
x106
1852E
Rivalries
constructive algorithms
,
data structures
,
greedy
3400
x165
1852C
Ina of the Mountain
data structures
,
dp
,
greedy
,
math
2400
x1538
1851G
Vlad and the Mountains
binary search
,
data structures
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
,
two pointers
2000
x3199
1850G
The Morning Star
combinatorics
,
data structures
,
geometry
,
implementation
,
math
,
sortings
1500
x12303
1849F
XOR Partition
binary search
,
bitmasks
,
data structures
,
divide and conquer
,
greedy
,
trees
2700
x713
1849E
Max to the Right of Min
binary search
,
data structures
,
divide and conquer
,
dp
,
dsu
,
two pointers
2300
x1632
1849C
Binary String Copying
binary search
,
brute force
,
data structures
,
hashing
,
strings
1600
x10458
1848B
Vika and the Bridge
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1200
x14803
1847F
The Boss's Identity
binary search
,
bitmasks
,
data structures
,
dfs and similar
,
greedy
,
math
,
sortings
2500
x888
1847D
Professor Higashikata
data structures
,
dsu
,
greedy
,
implementation
,
strings
1900
x3741
1846C
Rudolf and the Another Competition
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1200
x18801
1845D
Rating System
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
two pointers
1800
x7765
1844H
Multiple of Three Cycles
combinatorics
,
data structures
,
dp
,
dsu
,
math
3400
x137
1844G
Tree Weights
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
implementation
,
math
,
matrices
,
number theory
,
trees
3000
x716
1844F2
Min Cost Permutation (Hard Version)
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
,
sortings
2800
x400
1843F2
Omsk Metro (hard version)
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
math
,
trees
2300
x1587
1843F1
Omsk Metro (simple version)
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
1800
x5279
1843E
Tracking Segments
binary search
,
brute force
,
data structures
,
two pointers
1600
x12218
1842E
Tenzing and Triangle
data structures
,
dp
,
geometry
,
greedy
,
math
2300
x1610
1841E
Fill the Matrix
data structures
,
greedy
,
math
2200
x1998
1841D
Pairs of Segments
data structures
,
greedy
,
sortings
,
two pointers
2000
x4374
1840E
Character Blocking
data structures
,
hashing
,
implementation
1600
x7993
1839D
Ball Sorting
data structures
,
dp
,
sortings
2100
x2298
1838D
Bracket Walk
data structures
,
greedy
,
strings
2100
x3240
1837F
Editorial for Two
binary search
,
data structures
,
greedy
,
implementation
2400
x2190
1834E
MEX of LCM
binary search
,
data structures
,
implementation
,
math
,
number theory
2300
x2221
1834D
Survey in Class
brute force
,
data structures
,
greedy
,
implementation
,
sortings
1900
x4626
1833F
Ira and Flamenco
combinatorics
,
constructive algorithms
,
data structures
,
implementation
,
math
,
sortings
,
two pointers
1700
x7298
1830F
The Third Grace
data structures
,
dp
3200
x243
1830E
Bully Sort
data structures
,
math
3500
x243
1829G
Hits Different
data structures
,
dp
,
implementation
,
math
1600
x10339
1827F
Copium Permutation
constructive algorithms
,
data structures
,
greedy
3500
x117
1827D
Two Centroids
data structures
,
dfs and similar
,
greedy
,
trees
2800
x754
1827C
Palindrome Partition
binary search
,
brute force
,
data structures
,
dp
,
hashing
,
strings
2600
x1199
1827B2
Range Sorting (Hard Version)
binary search
,
data structures
,
dp
,
greedy
2400
x1861
1826E
Walk the Runway
bitmasks
,
brute force
,
data structures
,
dp
,
graphs
,
implementation
,
sortings
2400
x1591
1824E
LuoTianyi and Cartridge
data structures
,
trees
3500
x130
1824D
LuoTianyi and the Function
data structures
3000
x484
1824C
LuoTianyi and XOR-Tree
data structures
,
dfs and similar
,
dp
,
dsu
,
greedy
,
trees
2500
x1379
1822G2
Magic Triples (Hard Version)
brute force
,
data structures
,
math
,
number theory
2200
x2411
1822G1
Magic Triples (Easy Version)
brute force
,
data structures
,
math
,
number theory
1700
x6989
1819F
Willy-nilly, Crack, Into Release!
data structures
,
dp
3500
x131
1819D
Misha and Apples
brute force
,
data structures
,
dp
,
two pointers
2800
x632
1817A
Almost Increasing Subsequence
binary search
,
data structures
,
greedy
1500
x10967
1814E
Chain Chips
data structures
,
dp
,
matrices
2300
x1330
1814D
Balancing Weapons
binary search
,
brute force
,
data structures
,
math
,
two pointers
2500
x860
1811G2
Vlad and the Nice Paths (hard version)
binary search
,
combinatorics
,
data structures
,
dp
,
math
,
two pointers
2200
x1745
1810F
M-tree
data structures
,
math
,
sortings
,
trees
2800
x569
1810E
Monsters
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
2100
x3164
1809F
Traveling in Berland
binary search
,
data structures
,
graphs
,
greedy
,
implementation
2500
x759
1808D
Petya, Petya, Petr, and Palindromes
binary search
,
brute force
,
data structures
,
two pointers
2100
x2302
1807G1
Subsequence Addition (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
sortings
1100
x18799
1807D
Odd Queries
data structures
,
implementation
900
x32177
1806E
Tree Master
brute force
,
data structures
,
dfs and similar
,
trees
2200
x2820
1805E
There Should Be a Lot of Maximums
brute force
,
data structures
,
dfs and similar
,
dp
,
trees
,
two pointers
2300
x1603
1805C
Place for a Selfie
binary search
,
data structures
,
geometry
,
math
1400
x12505
1804G
Flow Control
data structures
,
dsu
,
implementation
3500
x202
1801G
A task for substrings
data structures
,
string suffix structures
,
strings
3400
x369
1801E
Gasoline prices
data structures
,
divide and conquer
,
dsu
,
hashing
,
trees
3000
x448
1801D
The way home
binary search
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x2195
1801C
Music Festival
binary search
,
data structures
,
dp
,
greedy
,
sortings
1900
x3410
1801B
Buying gifts
data structures
,
greedy
,
sortings
1800
x6194
1800D
Remove Two Letters
data structures
,
greedy
,
hashing
,
strings
1200
x23369
1800C2
Powering the Hero (hard version)
data structures
,
greedy
1100
x22355
1800C1
Powering the Hero (easy version)
data structures
,
greedy
1000
x23423
1799D2
Hot Start Up (hard version)
data structures
,
dp
2100
x2436
1799A
Recent Actions
data structures
,
greedy
,
implementation
,
math
800
x11552
1798B
Three Sevens
brute force
,
data structures
,
greedy
,
implementation
1000
x16522
1797F
Li Hua and Path
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
trees
3000
x350
1797E
Li Hua and Array
brute force
,
data structures
,
dsu
,
math
,
number theory
,
two pointers
2300
x1264
1797D
Li Hua and Tree
brute force
,
data structures
,
dfs and similar
,
dp
,
implementation
,
trees
1900
x3929
1796D
Maximum Subarray
data structures
,
dp
,
greedy
,
two pointers
2000
x4280
1795E
Explosions?
binary search
,
data structures
,
dp
,
greedy
,
math
2200
x2005
1795C
Tea Tasting
binary search
,
data structures
,
implementation
1500
x12329
1794E
Labeling the Tree with Distances
data structures
,
dp
,
greedy
,
hashing
,
implementation
,
trees
2400
x1084
1793F
Rebrending
brute force
,
data structures
,
divide and conquer
,
implementation
2600
x1366
1793E
Velepin and Marketing
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2600
x1050
1793C
Dora and Search
constructive algorithms
,
data structures
,
two pointers
1200
x20111
1792D
Fixed Prefix Permutations
binary search
,
bitmasks
,
data structures
,
hashing
,
math
,
sortings
1700
x6232
1791F
Range Update Point Query
binary search
,
brute force
,
data structures
1500
x12346
1790D
Matryoshkas
data structures
,
greedy
,
sortings
1200
x20006
1788E
Sum Over Zero
data structures
,
dfs and similar
,
dp
2200
x2656
1787I
Treasure Hunt
data structures
,
divide and conquer
,
two pointers
3400
x165
1787H
Codeforces Scoreboard
binary search
,
data structures
,
dp
,
geometry
3300
x228
1787G
Colorful Tree Again
brute force
,
data structures
,
trees
3000
x432
1784C
Monsters (hard version)
data structures
,
greedy
2200
x1649
1783G
Weighed Tree Radius
data structures
,
divide and conquer
,
implementation
,
trees
2800
x477
1783E
Game of the Year
brute force
,
data structures
,
math
,
number theory
2300
x2091
1781E
Rectangle Shrinking
binary search
,
brute force
,
data structures
,
greedy
,
implementation
,
two pointers
2300
x1300
1780F
Three Chairs
bitmasks
,
brute force
,
combinatorics
,
data structures
,
dp
,
number theory
,
sortings
2300
x1465
←
1
2
3
4
5
...
17
18
→
User lists
Name