Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
Main
acmsguru
|
Problems
Submit
Status
Standings
Custom test
Problems
#
Name
1981F
Turtle and Paths on a Tree
data structures
,
dp
,
trees
x119
1981E
Turtle and Intersected Segments
data structures
,
dsu
,
graphs
,
greedy
x464
1981D
Turtle and Multiplication
constructive algorithms
,
dfs and similar
,
graphs
,
number theory
x938
1981C
Turtle and an Incomplete Sequence
bitmasks
,
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
x3488
1981B
Turtle and an Infinite Sequence
bitmasks
,
math
x9909
1981A
Turtle and Piggy Are Playing a Game
brute force
,
greedy
,
math
x17212
1980G
Yasya and the Mysterious Tree
bitmasks
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
strings
,
trees
x697
1980F2
Field Division (hard version)
math
,
sortings
x570
1980F1
Field Division (easy version)
data structures
,
math
,
sortings
x2482
1980E
Permutation of Rows and Columns
constructive algorithms
,
data structures
,
greedy
,
hashing
,
implementation
,
math
,
matrices
,
sortings
x7279
1980D
GCD-sequence
greedy
,
implementation
,
math
,
number theory
x10147
1980C
Sofia and the Lost Operations
constructive algorithms
,
greedy
x14010
1980B
Choosing Cubes
sortings
,
sortings
x27930
1980A
Problem Generator
math
x32287
1979F
Kostyanych's Theorem
brute force
,
constructive algorithms
,
graphs
,
interactive
x117
1979E
Manhattan Triangle
binary search
,
constructive algorithms
,
data structures
,
geometry
,
implementation
,
two pointers
x759
1979D
Fixing a Binary String
bitmasks
,
brute force
,
constructive algorithms
,
greedy
,
hashing
,
strings
x4292
1979C
Earning on Bets
binary search
,
combinatorics
,
constructive algorithms
,
number theory
x13354
1979B
XOR Sequences
bitmasks
,
greedy
x17040
1979A
Guess the Maximum
brute force
,
greedy
,
implementation
x22266
1977E
Tensor
constructive algorithms
,
graphs
,
interactive
2600
x434
1977D
XORificator
bitmasks
,
brute force
,
greedy
,
hashing
2300
x1308
1977C
Nikita and LCM
brute force
,
data structures
,
dp
,
greedy
,
math
,
number theory
,
sortings
1900
x5159
1977B
Binary Colouring
bitmasks
,
constructive algorithms
,
greedy
,
math
1100
x14708
1977A
Little Nikita
math
800
x25414
1976F
Remove Bridges
data structures
,
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
x335
1976E
Splittable Permutations
combinatorics
,
data structures
,
dfs and similar
,
greedy
,
math
,
trees
x670
1976D
Invertible Bracket Sequences
binary search
,
combinatorics
,
data structures
,
divide and conquer
,
implementation
,
two pointers
x2970
1976C
Job Interview
binary search
,
dp
,
greedy
,
implementation
,
two pointers
x7774
1976B
Increase/Decrease/Copy
greedy
,
implementation
x17868
1976A
Verify Password
implementation
,
sortings
,
strings
x23204
1975I
Mind Bloom
dp
3500
x35
1975H
378QAQ and Core
greedy
,
strings
3500
x50
1975G
Zimpha Fan Club
fft
,
greedy
,
math
,
strings
3000
x158
1975F
Set
bitmasks
,
brute force
,
combinatorics
,
dfs and similar
,
divide and conquer
,
dp
,
math
2600
x576
1975E
Chain Queries
binary search
,
data structures
,
dfs and similar
,
implementation
,
trees
2100
x1693
1975D
Paint the Tree
brute force
,
dfs and similar
,
dp
,
greedy
,
shortest paths
,
trees
1700
x4570
1975C
Chamo and Mocha's Array
binary search
,
brute force
,
greedy
1200
x11487
1975B
378QAQ and Mocha's Array
brute force
,
greedy
,
math
,
sortings
1000
x14193
1975A
Bazoka and Mocha's Array
brute force
,
greedy
,
implementation
,
sortings
800
x16039
1974G
Money Buys Less Happiness Now
data structures
,
greedy
,
sortings
2000
x3325
1974F
Cutting Game
binary search
,
brute force
,
data structures
,
implementation
,
sortings
,
two pointers
1900
x2819
1974E
Money Buys Happiness
dp
1800
x6086
1974D
Ingenuity-2
constructive algorithms
,
greedy
,
implementation
1400
x12022
1974C
Beautiful Triple Pairs
combinatorics
,
data structures
1400
x12909
1974B
Symmetric Encoding
implementation
,
sortings
,
strings
800
x26696
1974A
Phone Desktop
greedy
,
math
800
x29005
1973F
Maximum GCD Sum Queries
bitmasks
,
brute force
,
dp
,
implementation
,
number theory
3100
x151
1973E
Cat, Fox and Swaps
graphs
,
math
,
sortings
2500
x624
1973D
Cat, Fox and Maximum Array Split
brute force
,
interactive
,
math
2400
x1579
1973C
Cat, Fox and Double Maximum
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
1700
x6819
1973B
Cat, Fox and the Lonely Array
binary search
,
bitmasks
,
data structures
,
greedy
,
math
,
two pointers
1300
x11736
1973A
Chess For Three
brute force
,
dp
,
implementation
,
math
900
x20591
1972B
Coin Games
games
900
x18166
1972A
Contest Proposal
brute force
,
greedy
,
two pointers
800
x20100
1971H
±1
2-sat
,
dfs and similar
,
graphs
2100
x1313
1971G
XOUR
data structures
,
dsu
,
sortings
1700
x7482
1971F
Circle Perimeter
binary search
,
brute force
,
dfs and similar
,
geometry
,
implementation
,
math
1600
x7943
1971E
Find the Car
binary search
,
math
,
sortings
1500
x11189
1971D
Binary Cut
dp
,
greedy
,
implementation
,
sortings
,
strings
1100
x21606
1971C
Clock and Strings
implementation
900
x27037
1971B
Different String
implementation
,
strings
800
x30714
1971A
My First Sorting Problem
implementation
,
sortings
800
x37069
1970G3
Min-Fund Prison (Hard)
bitmasks
,
dfs and similar
,
dp
,
graphs
,
trees
2400
x217
1970G2
Min-Fund Prison (Medium)
brute force
,
dfs and similar
,
dp
,
graphs
,
trees
2200
x392
1970G1
Min-Fund Prison (Easy)
dfs and similar
,
trees
1900
x903
1970F3
Playing Quidditch (Hard)
implementation
2300
x288
1970F2
Playing Quidditch (Medium)
implementation
2300
x279
1970F1
Playing Quidditch (Easy)
implementation
2300
x350
1970E3
Trails (Hard)
dp
,
matrices
2200
x458
1970E2
Trails (Medium)
dp
,
matrices
2000
x821
1970E1
Trails (Easy)
dp
1800
x1292
1970D3
Arithmancy (Hard)
interactive
3100
x80
1970D2
Arithmancy (Medium)
constructive algorithms
,
interactive
,
probabilities
,
strings
2600
x145
1970D1
Arithmancy (Easy)
brute force
,
constructive algorithms
,
interactive
,
strings
2100
x455
1970C3
Game on Tree (Hard)
dfs and similar
,
dp
,
games
,
trees
1900
x963
1970C2
Game on Tree (Medium)
dfs and similar
,
dp
,
games
,
trees
1700
x1648
1970C1
Game on Tree (Easy)
games
1400
x2133
1970B3
Exact Neighbours (Hard)
constructive algorithms
2300
x356
1970B2
Exact Neighbours (Medium)
constructive algorithms
2100
x549
1970B1
Exact Neighbours (Easy)
constructive algorithms
1900
x788
1970A3
Balanced Unshuffle (Hard)
constructive algorithms
,
trees
2400
x366
1970A2
Balanced Unshuffle (Medium)
brute force
,
constructive algorithms
,
trees
2400
x369
1970A1
Balanced Shuffle (Easy)
implementation
,
sortings
1000
x3093
1969F
Card Pairing
dp
,
greedy
,
hashing
,
implementation
3000
x162
1969E
Unique Array
binary search
,
data structures
,
divide and conquer
,
dp
,
greedy
2400
x1055
1969D
Shop Game
data structures
,
greedy
,
math
,
sortings
1900
x3732
1969C
Minimizing the Sum
dp
,
implementation
1700
x6894
1969B
Shifts and Sorting
constructive algorithms
,
greedy
1000
x16067
1969A
Two Friends
constructive algorithms
,
implementation
,
math
800
x17622
1968G2
Division + LCP (hard version)
binary search
,
brute force
,
data structures
,
dp
,
hashing
,
math
,
string suffix structures
,
strings
2200
x1539
1968G1
Division + LCP (easy version)
binary search
,
data structures
,
dp
,
hashing
,
string suffix structures
,
strings
1900
x3483
1968F
Equal XOR Segments
binary search
,
data structures
1800
x4447
1968E
Cells Arrangement
constructive algorithms
1600
x8755
1968D
Permutation Game
brute force
,
dfs and similar
,
games
,
graphs
,
greedy
,
math
1300
x12793
1968C
Assembly via Remainders
constructive algorithms
,
number theory
1000
x21467
1968B
Prefiquence
greedy
,
two pointers
800
x24972
1968A
Maximize?
brute force
,
math
,
number theory
800
x29606
1967F
Next and Prev
brute force
,
data structures
,
implementation
3200
x42
1967E2
Again Counting Arrays (Hard Version)
combinatorics
,
dp
,
math
3500
x73
←
1
2
3
...
95
96
→
→ Pay attention
Before contest
Codeforces Global Round 26
07:17:08
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