Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round (Div. 3)
6 days
→ Filter Problems
Difficulty:
—
implementation
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
1312C
Adding Powers
bitmasks
,
greedy
,
implementation
,
math
,
number theory
,
ternary search
1400
x16069
1311F
Moving Points
data structures
,
divide and conquer
,
implementation
,
sortings
1900
x4113
1311A
Add Odd or Subtract Even
greedy
,
implementation
,
math
800
x41094
1310B
Double Elimination
dp
,
implementation
2500
x491
1307E
Cow and Treats
binary search
,
combinatorics
,
dp
,
greedy
,
implementation
,
math
2500
x1125
1307A
Cow and Haybales
greedy
,
implementation
800
x14878
1305E
Kuroni and the Score Distribution
constructive algorithms
,
greedy
,
implementation
,
math
2200
x3028
1304C
Air Conditioner
dp
,
greedy
,
implementation
,
sortings
,
two pointers
1500
x16054
1304B
Longest Palindrome
brute force
,
constructive algorithms
,
greedy
,
implementation
,
strings
1100
x17611
1303F
Number of Components
dsu
,
implementation
2800
x517
1303C
Perfect Keyboard
dfs and similar
,
greedy
,
implementation
1600
x12026
1303A
Erasing Zeroes
implementation
,
strings
800
x31111
1301F
Super Jaber
dfs and similar
,
graphs
,
implementation
,
shortest paths
2600
x1094
1301E
Nanosoft
binary search
,
data structures
,
dp
,
implementation
2500
x1280
1301D
Time to Run
constructive algorithms
,
graphs
,
implementation
2000
x3842
1301A
Three Strings
implementation
,
strings
800
x19220
1300B
Assigning to Classes
greedy
,
implementation
,
sortings
1000
x22650
1300A
Non-zero
implementation
,
math
800
x20870
1297F
Movie Fan
*special problem
,
data structures
,
greedy
,
implementation
,
sortings
x115
1297B
Cartoons
*special problem
,
implementation
,
sortings
x412
1297A
Likes Display
*special problem
,
implementation
x936
1296C
Yet Another Walking Robot
data structures
,
implementation
1500
x14636
1294E
Obtain a Permutation
greedy
,
implementation
,
math
1900
x4842
1294D
MEX maximizing
data structures
,
greedy
,
implementation
,
math
1600
x11530
1294B
Collecting Packages
implementation
,
sortings
1200
x21457
1293A
ConneR and the A.R.C. Markland-N
binary search
,
brute force
,
implementation
1100
x15221
1292B
Aroma's Search
brute force
,
constructive algorithms
,
geometry
,
greedy
,
implementation
1700
x6251
1292A
NEKO's Maze Game
data structures
,
dsu
,
implementation
1400
x13112
1291B
Array Sharpening
greedy
,
implementation
1300
x14012
1290A
Mind Control
brute force
,
data structures
,
implementation
1600
x8468
1287B
Hyperset
brute force
,
data structures
,
implementation
1500
x9359
1287A
Angry Students
greedy
,
implementation
800
x20391
1286F
Harry The Potter
brute force
,
constructive algorithms
,
dp
,
fft
,
implementation
,
math
3100
x237
1285B
Just Eat It!
dp
,
greedy
,
implementation
1300
x21541
1284B
New Year and Ascent Sequence
binary search
,
combinatorics
,
data structures
,
dp
,
implementation
,
sortings
1400
x10748
1284A
New Year and Naming
implementation
,
strings
800
x17918
1282A
Temporarily unavailable
implementation
,
math
900
x14671
1281A
Suffix Three
implementation
800
x17875
1280B
Beingawesomeism
implementation
,
math
1800
x3900
1280A
Cut and Paste
implementation
,
math
1700
x5311
1279C
Stack of Presents
data structures
,
implementation
1400
x11578
1279B
Verse For Santa
binary search
,
brute force
,
implementation
1300
x13524
1278C
Berry Jam
data structures
,
dp
,
greedy
,
implementation
1700
x7785
1278A
Shuffle Hashing
brute force
,
implementation
,
strings
1000
x16053
1277D
Let's Play the Words?
data structures
,
hashing
,
implementation
,
math
1900
x3090
1277A
Happy Birthday, Polycarp!
implementation
1000
x13131
1272C
Yet Another Broken Keyboard
combinatorics
,
dp
,
implementation
1200
x25610
1272B
Snow Walking Robot
constructive algorithms
,
greedy
,
implementation
1200
x13718
1271D
Portals
data structures
,
dp
,
greedy
,
implementation
,
sortings
2100
x2816
1271C
Shawarma Tent
brute force
,
geometry
,
greedy
,
implementation
1300
x10425
1268A
Long Beautiful Integer
constructive algorithms
,
greedy
,
implementation
,
strings
1700
x8461
1267J
Just Arrange the Icons
greedy
,
implementation
,
math
1800
x2776
1267I
Intriguing Selection
brute force
,
constructive algorithms
,
implementation
,
interactive
,
sortings
2600
x865
1266E
Spaceship Solitaire
data structures
,
greedy
,
implementation
2100
x2208
1266D
Decreasing Debts
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
math
,
two pointers
2000
x3547
1265B
Beautiful Numbers
data structures
,
implementation
,
math
,
two pointers
1300
x12489
1264A
Beautiful Regional Contest
greedy
,
implementation
1500
x9993
1263E
Editor
data structures
,
implementation
2100
x2619
1263B
PIN Codes
greedy
,
implementation
1400
x11273
1257C
Dominated Subarray
greedy
,
implementation
,
sortings
,
strings
,
two pointers
1200
x15769
1255C
League of Leesins
constructive algorithms
,
implementation
1600
x6544
1255B
Fridge Lockers
graphs
,
implementation
1100
x11836
1254A
Feeding Chicken
constructive algorithms
,
greedy
,
implementation
1700
x5132
1253B
Silly Mistake
greedy
,
implementation
1400
x11073
1253A
Single Push
implementation
1000
x17839
1252H
Twin Buildings
greedy
,
implementation
1800
x2598
1252C
Even Path
data structures
,
implementation
1600
x3638
1250F
Data Center
brute force
,
implementation
800
x7190
1250E
The Coronation
graphs
,
implementation
2300
x805
1250A
Berstagram
implementation
1400
x4039
1249C1
Good Numbers (easy version)
brute force
,
greedy
,
implementation
1300
x15290
1248D1
The World Is Just a Programming Task (Easy Version)
brute force
,
dp
,
greedy
,
implementation
2000
x2302
1244F
Chips
constructive algorithms
,
implementation
2300
x1506
1244D
Paint the Tree
brute force
,
constructive algorithms
,
dp
,
graphs
,
implementation
,
trees
1800
x7404
1244B
Rooms and Staircases
brute force
,
implementation
1000
x15397
1243A
Maximum Square
implementation
800
x15530
1239F
Swiper, no swiping!
graphs
,
implementation
3400
x247
1239E
Turtle
dp
,
implementation
3100
x902
1239C
Queue in the Train
data structures
,
greedy
,
implementation
2300
x1315
1239B
The World Is Just a Programming Task (Hard Version)
implementation
2500
x976
1237D
Balanced Playlist
binary search
,
data structures
,
implementation
2000
x4039
1237C2
Balanced Removals (Harder)
binary search
,
constructive algorithms
,
divide and conquer
,
greedy
,
implementation
,
sortings
1900
x4274
1237A
Balanced Rating Changes
implementation
,
math
1000
x18972
1236D
Alice and the Doll
brute force
,
data structures
,
greedy
,
implementation
2300
x1650
1236C
Labs
constructive algorithms
,
greedy
,
implementation
1300
x9927
1234C
Pipes
dp
,
implementation
1500
x12410
1234B2
Social Network (hard version)
data structures
,
implementation
1300
x16686
1234B1
Social Network (easy version)
implementation
1000
x18531
1230B
Ania and Minimizing
greedy
,
implementation
1000
x18501
1230A
Dawid and Bags of Candies
brute force
,
implementation
800
x21165
1228F
One Node is Gone
constructive algorithms
,
implementation
,
trees
2500
x421
1228D
Complete Tripartite
brute force
,
constructive algorithms
,
graphs
,
hashing
,
implementation
1900
x5132
1228B
Filling the Grid
implementation
,
math
1400
x11452
1228A
Distinct Digits
brute force
,
implementation
800
x21431
1225B2
TV Subscriptions (Hard Version)
implementation
,
two pointers
1300
x10347
1225B1
TV Subscriptions (Easy Version)
implementation
1000
x11777
1220A
Cards
implementation
,
sortings
,
strings
800
x29142
1219G
Harvester
implementation
2000
x641
1219C
Periodic integer number
implementation
,
strings
1700
x1765
1217E
Sum Queries?
data structures
,
greedy
,
implementation
,
math
2300
x1841
←
1
2
...
8
9
10
11
12
...
26
27
→
User lists
Name