Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
Main
acmsguru
|
Problems
Submit
Status
Standings
Custom test
Problems
#
Name
1658D2
388535 (Hard Version)
bitmasks
,
brute force
,
data structures
,
math
2300
x2425
1658D1
388535 (Easy Version)
bitmasks
,
math
1600
x8728
1658C
Shinju and the Lost Permutation
constructive algorithms
,
math
1700
x9065
1658B
Marin and Anti-coprime Permutation
combinatorics
,
math
,
number theory
800
x18331
1658A
Marin and Photoshoot
constructive algorithms
,
implementation
,
math
800
x20111
1657F
Words on Tree
2-sat
,
dfs and similar
,
dsu
,
graphs
,
trees
2600
x543
1657E
Star MST
combinatorics
,
dp
,
graph matchings
,
math
2200
x1977
1657D
For Gamers. By Gamers.
binary search
,
brute force
,
greedy
,
math
,
sortings
2000
x4691
1657C
Bracket Sequence Deletion
greedy
,
implementation
1200
x16478
1657B
XY Sequence
greedy
800
x22545
1657A
Integer Moves
brute force
,
math
800
x23635
1656I
Neighbour Ordering
constructive algorithms
,
graphs
3500
x92
1656H
Equal LCM Subsets
data structures
,
math
,
number theory
3200
x394
1656G
Cycle Palindrome
constructive algorithms
,
graphs
,
math
3200
x267
1656F
Parametric MST
binary search
,
constructive algorithms
,
graphs
,
greedy
,
math
,
sortings
2600
x981
1656E
Equal Tree Sums
constructive algorithms
,
dfs and similar
,
math
,
trees
2200
x3274
1656D
K-good
constructive algorithms
,
math
,
number theory
1900
x6566
1656C
Make Equal With Mod
constructive algorithms
,
math
,
number theory
,
sortings
1200
x18418
1656B
Subtract Operation
data structures
,
greedy
,
math
,
two pointers
1100
x17549
1656A
Good Pairs
math
,
sortings
800
x19214
1654H
Three Minimums
combinatorics
,
constructive algorithms
,
divide and conquer
,
dp
,
fft
,
math
3500
x68
1654G
Snowy Mountain
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
2900
x351
1654F
Minimal String Xoration
bitmasks
,
data structures
,
divide and conquer
,
greedy
,
hashing
,
sortings
,
strings
2800
x1045
1654E
Arithmetic Operations
brute force
,
data structures
,
graphs
,
math
2300
x1984
1654D
Potion Brewing Class
dfs and similar
,
math
,
number theory
,
trees
2100
x2771
1654C
Alice and the Cake
data structures
,
greedy
,
implementation
,
sortings
1400
x13107
1654B
Prefix Removals
strings
800
x15461
1654A
Maximum Cake Tastiness
brute force
,
greedy
,
implementation
,
sortings
800
x18393
1651F
Tower Defense
binary search
,
brute force
,
data structures
3000
x360
1651E
Sum of Matchings
brute force
,
combinatorics
,
constructive algorithms
,
dfs and similar
,
graph matchings
,
greedy
,
math
2600
x491
1651D
Nearest Excluded Points
binary search
,
data structures
,
dfs and similar
,
graphs
,
shortest paths
1900
x4789
1651C
Fault-tolerant Network
brute force
,
data structures
,
implementation
1500
x10426
1651B
Prove Him Wrong
constructive algorithms
,
greedy
800
x19334
1651A
Playoff
implementation
800
x25298
1650G
Counting Shortcuts
data structures
,
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2323
1650F
Vitaly and Advanced Useless Algorithms
dp
,
greedy
,
implementation
2200
x1370
1650E
Rescheduling the Exam
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1900
x3990
1650D
Twist the Permutation
brute force
,
constructive algorithms
,
implementation
,
math
1300
x12636
1650C
Weight of the System of Nested Segments
greedy
,
hashing
,
implementation
,
sortings
1200
x16318
1650B
DIV + MOD
math
900
x26722
1650A
Deletions of Two Adjacent Letters
implementation
,
strings
800
x33758
1649B
Game of Ball Passing
greedy
,
implementation
1300
x12747
1649A
Game
implementation
800
x15337
1648F
Two Avenues
data structures
,
dfs and similar
,
graphs
3500
x101
1648E
Air Reform
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
graphs
,
implementation
,
trees
3200
x380
1648D
Serious Business
data structures
,
divide and conquer
,
dp
,
implementation
,
shortest paths
2800
x771
1648C
Tyler and Strings
combinatorics
,
data structures
,
implementation
1900
x2849
1648B
Integral Array
brute force
,
constructive algorithms
,
data structures
,
math
1800
x6158
1648A
Weird Sum
combinatorics
,
data structures
,
geometry
,
math
,
matrices
,
sortings
1400
x11659
1647F
Madoka and Laziness
dp
,
greedy
3100
x375
1647E
Madoka and the Sixth-graders
data structures
,
dfs and similar
,
greedy
2500
x953
1647D
Madoka and the Best School in Russia
constructive algorithms
,
dp
,
math
,
number theory
1900
x5090
1647C
Madoka and Childish Pranks
constructive algorithms
,
greedy
1300
x12332
1647B
Madoka and the Elegant Gift
brute force
,
constructive algorithms
,
graphs
,
implementation
1200
x15033
1647A
Madoka and Math Dad
implementation
,
math
800
x22430
1646F
Playing Around the Table
constructive algorithms
,
greedy
,
implementation
2900
x386
1646E
Power Board
brute force
,
dp
,
math
,
number theory
2200
x2288
1646D
Weight the Tree
constructive algorithms
,
dfs and similar
,
dp
,
implementation
,
trees
2000
x3519
1646C
Factorials and Powers of Two
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
math
1500
x13053
1646B
Quality vs Quantity
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
800
x20821
1646A
Square Counting
math
800
x23936
1644F
Basis
combinatorics
,
fft
,
math
,
number theory
2900
x309
1644E
Expand the Path
brute force
,
combinatorics
,
data structures
,
implementation
,
math
1900
x2949
1644D
Cross Coloring
data structures
,
implementation
,
math
1700
x6961
1644C
Increase Subarray Sums
brute force
,
dp
,
greedy
,
implementation
1400
x13298
1644B
Anti-Fibonacci Permutation
brute force
,
constructive algorithms
,
implementation
800
x20414
1644A
Doors and Keys
implementation
800
x26790
1642B
Power Walking
greedy
900
x16533
1642A
Hard Way
geometry
800
x15890
1641F
Covering Circle
geometry
3500
x93
1641E
Special Positions
combinatorics
,
divide and conquer
,
fft
,
math
3300
x200
1641D
Two Arrays
bitmasks
,
brute force
,
combinatorics
,
greedy
,
hashing
,
math
,
two pointers
2700
x1035
1641C
Anonymity Is Important
binary search
,
brute force
,
data structures
,
dsu
,
greedy
,
sortings
2200
x2303
1641B
Repetitions Decoding
constructive algorithms
,
implementation
,
sortings
2000
x3717
1641A
Great Sequence
brute force
,
greedy
,
sortings
1200
x17448
1639K
Treasure Hunt
graphs
,
interactive
1639J
Treasure Hunt
graphs
,
interactive
1639I
Treasure Hunt
graphs
,
interactive
1639H
Treasure Hunt
graphs
,
interactive
1639G
Treasure Hunt
graphs
,
interactive
1639F
Treasure Hunt
graphs
,
interactive
1639E
Treasure Hunt
graphs
,
interactive
1639D
Treasure Hunt
graphs
,
interactive
1639C
Treasure Hunt
graphs
,
interactive
1639B
Treasure Hunt
graphs
,
interactive
1639A
Treasure Hunt
graphs
,
interactive
1638F
Two Posters
brute force
,
data structures
,
greedy
,
two pointers
3200
x186
1638E
Colorful Operations
brute force
,
data structures
,
implementation
2400
x1782
1638D
Big Brush
constructive algorithms
,
data structures
,
greedy
,
implementation
2000
x4025
1638C
Inversion Graph
data structures
,
dsu
,
graphs
,
math
1300
x14325
1638B
Odd Swap Sort
data structures
,
math
,
sortings
1100
x20336
1638A
Reverse
constructive algorithms
,
greedy
,
math
800
x21177
1637H
Minimize Inversions Number
data structures
,
greedy
,
math
,
sortings
3500
x299
1637G
Birthday
constructive algorithms
,
greedy
,
math
3000
x449
1637F
Towers
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2500
x1688
1637E
Best Pair
binary search
,
brute force
,
implementation
2100
x3175
1637D
Yet Another Minimization Problem
dp
,
greedy
,
math
1800
x7337
1637C
Andrew and Stones
greedy
,
implementation
1200
x17284
1637B
MEX and Array
brute force
,
dp
,
greedy
,
math
1100
x14589
1637A
Sorting Parts
brute force
,
sortings
800
x22052
←
1
2
...
17
18
19
20
21
...
94
95
→
→ Pay attention
Before contest
Codeforces Round 940 (Div. 2) and CodeCraft-23
40:01:05
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
User lists
Name