Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
4 days
Register now »
*has extra registration
→ 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
Add tag
Main
acmsguru
|
Problems
Submit
Status
Standings
Custom test
Problems
#
Name
1369E
DeadLee
data structures
,
dfs and similar
,
greedy
,
implementation
,
sortings
2400
x2279
1369D
TediousLee
dp
,
graphs
,
greedy
,
math
,
trees
1900
x8673
1369C
RationalLee
greedy
,
math
,
sortings
,
two pointers
1400
x19675
1369B
AccurateLee
greedy
,
implementation
,
strings
1200
x24531
1369A
FashionabLee
geometry
,
math
800
x36759
1368H2
Breadboard Capacity (hard version)
3500
x226
1368H1
Breadboard Capacity (easy version)
dp
,
flows
,
greedy
3300
x350
1368G
Shifting Dominoes
data structures
,
geometry
,
graphs
,
trees
3200
x609
1368F
Lamps on a Circle
games
,
implementation
,
interactive
,
math
2600
x1050
1368E
Ski Accidents
constructive algorithms
,
graphs
,
greedy
2500
x2223
1368D
AND, OR and square sum
bitmasks
,
greedy
,
math
1700
x11946
1368C
Even Picture
constructive algorithms
1500
x13483
1368B
Codeforces Subsequences
brute force
,
constructive algorithms
,
greedy
,
math
,
strings
1500
x19898
1368A
C+=
brute force
,
greedy
,
implementation
,
math
800
x39898
1367F2
Flying Sort (Hard Version)
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2400
x1683
1367F1
Flying Sort (Easy Version)
dp
,
greedy
,
two pointers
2100
x3301
1367E
Necklace Assembly
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
number theory
1900
x5475
1367D
Task On The Board
constructive algorithms
,
greedy
,
implementation
,
sortings
1800
x8366
1367C
Social Distance
constructive algorithms
,
greedy
,
math
1300
x23585
1367B
Even Array
greedy
,
math
800
x54262
1367A
Short Substrings
implementation
,
strings
800
x58068
1366G
Construct the String
data structures
,
dp
,
strings
2700
x550
1366F
Jog Around The Graph
binary search
,
dp
,
geometry
,
graphs
2700
x817
1366E
Two Arrays
binary search
,
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
two pointers
2100
x4299
1366D
Two Divisors
constructive algorithms
,
math
,
number theory
2000
x10642
1366C
Palindromic Paths
greedy
,
math
1500
x13618
1366B
Shuffle
math
,
two pointers
1300
x21297
1366A
Shovels and Swords
binary search
,
greedy
,
math
1100
x30334
1365G
Secure Password
bitmasks
,
combinatorics
,
constructive algorithms
,
interactive
,
math
2800
x1176
1365F
Swaps Again
constructive algorithms
,
implementation
,
sortings
2100
x4466
1365E
Maximum Subsequence Value
brute force
,
constructive algorithms
1900
x7877
1365D
Solve The Maze
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
shortest paths
1700
x17566
1365C
Rotation Matching
constructive algorithms
,
data structures
,
greedy
,
implementation
1400
x23249
1365B
Trouble Sort
constructive algorithms
,
implementation
1300
x27032
1365A
Matrix Game
games
,
greedy
,
implementation
1100
x24172
1364E
X-OR
bitmasks
,
constructive algorithms
,
divide and conquer
,
interactive
,
probabilities
2700
x1437
1364D
Ehab's Last Corollary
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
trees
2100
x4434
1364C
Ehab and Prefix MEXs
brute force
,
constructive algorithms
,
greedy
1600
x13229
1364B
Most socially-distanced subsequence
greedy
,
two pointers
1300
x20103
1364A
XXXXX
brute force
,
data structures
,
number theory
,
two pointers
1200
x28397
1363F
Rotating Substrings
dp
,
strings
2600
x1530
1363E
Tree Shuffling
dfs and similar
,
dp
,
greedy
,
trees
2000
x6862
1363D
Guess The Maximums
binary search
,
implementation
,
interactive
,
math
2100
x4098
1363C
Game On Leaves
games
,
trees
1600
x18922
1363B
Subsequence Hate
implementation
,
strings
1400
x23766
1363A
Odd Selection
brute force
,
implementation
,
math
1200
x36275
1362C
Johnny and Another Rating Drop
bitmasks
,
greedy
,
math
1400
x18567
1362B
Johnny and His Hobbies
bitmasks
,
brute force
1200
x19305
1362A
Johnny and Ancient Computer
implementation
1000
x24478
1361F
Johnny and New Toy
data structures
,
implementation
,
math
3300
x154
1361E
James and the Chase
dfs and similar
,
graphs
,
probabilities
,
trees
3000
x700
1361D
Johnny and James
greedy
,
implementation
,
math
,
trees
2900
x320
1361C
Johnny and Megan's Necklace
binary search
,
bitmasks
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2500
x1645
1361B
Johnny and Grandmaster
greedy
,
implementation
,
math
,
sortings
1900
x3647
1361A
Johnny and Contribution
constructive algorithms
,
graphs
,
greedy
,
sortings
1700
x8443
1360H
Binary Median
binary search
,
bitmasks
,
brute force
,
constructive algorithms
2100
x4600
1360G
A/B Matrix
constructive algorithms
,
greedy
,
math
1900
x7835
1360F
Spy-string
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
hashing
,
strings
1700
x12501
1360E
Polygon
dp
,
graphs
,
implementation
,
shortest paths
1300
x25536
1360D
Buying Shovels
math
,
number theory
1300
x33676
1360C
Similar Pairs
constructive algorithms
,
graph matchings
,
greedy
,
sortings
1100
x33060
1360B
Honest Coach
greedy
,
sortings
800
x48323
1360A
Minimal Square
greedy
,
math
800
x51158
1359F
RC Kaboom Show
binary search
,
brute force
,
data structures
,
geometry
,
math
2900
x543
1359E
Modular Stability
combinatorics
,
math
,
number theory
2000
x6153
1359D
Yet Another Yet Another Task
data structures
,
dp
,
implementation
,
two pointers
2000
x9552
1359C
Mixing Water
binary search
,
math
1700
x13926
1359B
New Theatre Square
brute force
,
dp
,
greedy
,
implementation
,
two pointers
1000
x27924
1359A
Berland Poker
brute force
,
greedy
,
math
1000
x29808
1358F
Tasty Cookie
binary search
,
constructive algorithms
,
greedy
,
implementation
2700
x459
1358E
Are You Fired?
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x2337
1358D
The Best Vacation
binary search
,
brute force
,
greedy
,
implementation
,
two pointers
1900
x8213
1358C
Celex Update
math
1600
x17455
1358B
Maria Breaks the Self-isolation
greedy
,
sortings
1000
x24995
1358A
Park Lighting
greedy
,
math
800
x39705
1355F
Guess Divisors Count
constructive algorithms
,
interactive
,
number theory
2600
x870
1355E
Restorer Distance
binary search
,
greedy
,
math
,
sortings
,
ternary search
2100
x5188
1355D
Game With Array
constructive algorithms
,
math
1400
x18121
1355C
Count Triangles
binary search
,
implementation
,
math
,
two pointers
1800
x10732
1355B
Young Explorers
dp
,
greedy
,
sortings
1200
x25862
1355A
Sequence with Digits
brute force
,
implementation
,
math
1200
x26771
1354G
Find a Gift
binary search
,
interactive
,
probabilities
2600
x797
1354F
Summoning Minions
constructive algorithms
,
dp
,
flows
,
graph matchings
,
greedy
,
sortings
2500
x1236
1354E
Graph Coloring
dfs and similar
,
dp
,
graphs
2100
x3382
1354D
Multiset
binary search
,
data structures
1900
x8889
1354C2
Not So Simple Polygon Embedding
binary search
,
brute force
,
geometry
,
math
2000
x6109
1354C1
Simple Polygon Embedding
binary search
,
geometry
,
math
,
ternary search
1400
x15736
1354B
Ternary String
binary search
,
dp
,
implementation
,
two pointers
1200
x31264
1354A
Alarm Clock
math
900
x23864
1353F
Decreasing Heights
brute force
,
dp
2200
x3361
1353E
K-periodic Garland
brute force
,
dp
,
greedy
1900
x7205
1353D
Constructing the Array
constructive algorithms
,
data structures
,
sortings
1600
x18232
1353C
Board Moves
math
1000
x35687
1353B
Two Arrays And Swaps
greedy
,
sortings
800
x50396
1353A
Most Unstable Array
constructive algorithms
,
greedy
,
math
800
x41181
1352G
Special Permutation
constructive algorithms
1600
x21512
1352F
Binary String Reconstruction
constructive algorithms
,
dfs and similar
,
math
1500
x17300
1352E
Special Elements
brute force
,
implementation
,
two pointers
1500
x20739
1352D
Alice, Bob and Candies
implementation
1300
x26426
1352C
K-th Not Divisible by n
binary search
,
math
1200
x55703
←
1
2
...
36
37
38
39
40
...
97
98
→
User lists
Name