Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Educational Codeforces Round 165 (Rated for Div. 2)
08:40:14
Register now »
→ Filter Problems
Difficulty:
—
sortings
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
1956F
Nene and the Passing Game
constructive algorithms
,
data structures
,
dsu
,
graphs
,
sortings
3000
x235
1955E
Long Inversions
brute force
,
greedy
,
implementation
,
sortings
1700
x6699
1955B
Progressive Square
constructive algorithms
,
data structures
,
implementation
,
sortings
1000
x22544
1954D
Colored Balls
combinatorics
,
dp
,
math
,
sortings
1800
x4561
1952J
Help, what does it mean to be "Based"
brute force
,
constructive algorithms
,
expression parsing
,
implementation
,
sortings
x676
1951C
Ticket Hoarding
greedy
,
math
,
sortings
1400
x9155
1949F
Dating
greedy
,
sortings
,
trees
x704
1949B
Charming Meals
binary search
,
brute force
,
greedy
,
sortings
x1551
1946A
Median of an Array
greedy
,
implementation
,
sortings
800
x23152
1945F
Kirill and Mushrooms
data structures
,
sortings
1900
x3483
1942D
Learning to Paint
binary search
,
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
sortings
2100
x2364
1941F
Rudolf and Imbalance
binary search
,
greedy
,
sortings
,
two pointers
1800
x5096
1940D
Almost Certainly
*special problem
,
constructive algorithms
,
data structures
,
sortings
x123
1940C
Burenka and Pether
*special problem
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
graphs
,
sortings
,
trees
x32
1940B
Three Arrays
*special problem
,
constructive algorithms
,
implementation
,
sortings
x173
1936C
Pokémon Arena
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
2400
x1060
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x7043
1933D
Turtle Tenacity: Continual Mods
constructive algorithms
,
greedy
,
math
,
number theory
,
sortings
1200
x17524
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x35100
1932F
Feed Cats
data structures
,
dp
,
sortings
1900
x3322
1931E
Anna and the Valentine's Day Gift
games
,
greedy
,
math
,
sortings
1400
x13161
1930C
Lexicographically Largest
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
1700
x6339
1930A
Maximise The Score
greedy
,
sortings
800
x17005
1929A
Sasha and the Beautiful Array
constructive algorithms
,
greedy
,
math
,
sortings
800
x28695
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x15101
1927F
Microcycle
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
1900
x3699
1924B
Space Harbour
data structures
,
implementation
,
math
,
sortings
2100
x2256
1922B
Forming Triangles
combinatorics
,
constructive algorithms
,
math
,
sortings
1200
x18894
1921D
Very Different Array
data structures
,
greedy
,
sortings
,
two pointers
1100
x19853
1920B
Summation Game
games
,
greedy
,
math
,
sortings
1100
x19136
1919D
01 Tree
constructive algorithms
,
data structures
,
dsu
,
greedy
,
sortings
,
trees
2100
x3578
1918F
Caterpillar on a Tree
dfs and similar
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
2500
x764
1918E
ace5 and Task Order
constructive algorithms
,
divide and conquer
,
implementation
,
interactive
,
probabilities
,
sortings
2200
x1535
1918B
Minimize Inversions
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
900
x21963
1915G
Bicycles
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
1800
x5381
1915F
Greetings
data structures
,
divide and conquer
,
sortings
1500
x11465
1914E2
Game with Marbles (Hard Version)
games
,
greedy
,
sortings
1400
x11156
1914E1
Game with Marbles (Easy Version)
brute force
,
games
,
greedy
,
sortings
1400
x11065
1914D
Three Activities
brute force
,
dp
,
greedy
,
implementation
,
sortings
1200
x17980
1912A
Accumulator Apex
data structures
,
implementation
,
sortings
1900
x1855
1909C
Heavy Intervals
constructive algorithms
,
data structures
,
dsu
,
greedy
,
math
,
sortings
1400
x9886
1907F
Shift and Reverse
greedy
,
sortings
1800
x4335
1906F
Maximize The Value
data structures
,
sortings
2100
x924
1904D2
Set To Max (Hard Version)
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
sortings
1800
x3765
1904C
Array Game
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
1400
x10489
1904B
Collecting Game
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1100
x12724
1903A
Halloumi Boxes
brute force
,
greedy
,
sortings
800
x23684
1901E
Compressed Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
2200
x1354
1899G
Unusual Entertainment
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
sortings
,
trees
,
two pointers
1900
x2892
1899E
Queue Sort
greedy
,
implementation
,
sortings
1300
x13813
1898E
Sofia and Strings
data structures
,
greedy
,
sortings
,
strings
,
two pointers
2200
x2031
1896G
Pepe Racing
constructive algorithms
,
implementation
,
interactive
,
sortings
3200
x298
1896E
Permutation Sorting
data structures
,
sortings
2100
x1993
1896C
Matching Arrays
binary search
,
constructive algorithms
,
greedy
,
sortings
1400
x8555
1896A
Jagged Swaps
sortings
800
x18396
1895E
Infinite Card Game
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
games
,
graphs
,
greedy
,
sortings
,
two pointers
2300
x1451
1895B
Points and Minimum Distance
greedy
,
math
,
sortings
800
x19599
1893B
Neutral Tonality
constructive algorithms
,
greedy
,
sortings
,
two pointers
1700
x8032
1891E
Brukhovich and Exams
brute force
,
greedy
,
implementation
,
math
,
sortings
2500
x770
1891C
Smilo and Monsters
binary search
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x11189
1891B
Deja Vu
brute force
,
math
,
sortings
1100
x15623
1891A
Sorting with Twos
constructive algorithms
,
sortings
800
x18313
1889C1
Doremy's Drying Plan (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x2991
1889B
Doremy's Connecting Plan
constructive algorithms
,
greedy
,
math
,
sortings
1700
x6706
1886E
I Wanna be the Team Leader
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
math
,
sortings
,
two pointers
2400
x1320
1884C
Medium Design
brute force
,
data structures
,
dp
,
greedy
,
sortings
1700
x5395
1883G2
Dances (Hard Version)
binary search
,
greedy
,
sortings
,
two pointers
1900
x4847
1876C
Autosynthesis
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
sortings
2100
x2128
1876B
Effects of Anti Pimples
combinatorics
,
number theory
,
sortings
1500
x7455
1876A
Helmets in Night Light
greedy
,
sortings
1000
x14667
1873E
Building an Aquarium
binary search
,
sortings
1100
x22730
1870D
Prefix Purchase
greedy
,
implementation
,
sortings
1800
x6390
1869B
2D Traveling
geometry
,
math
,
shortest paths
,
sortings
1100
x14313
1867A
green_gold_dog, array and permutation
constructive algorithms
,
sortings
800
x19157
1866F
Freak Joker Process
binary search
,
data structures
,
sortings
3100
x113
1864F
Exotic Queries
data structures
,
implementation
,
sortings
2300
x1307
1864E
Guess Game
bitmasks
,
data structures
,
games
,
math
,
probabilities
,
sortings
,
strings
,
trees
2100
x2459
1864B
Swap and Reverse
constructive algorithms
,
greedy
,
sortings
,
strings
1100
x14727
1863E
Speedrun
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
sortings
,
two pointers
2100
x2600
1863B
Split Sort
greedy
,
math
,
sortings
1100
x14537
1862G
The Great Equalizer
binary search
,
data structures
,
math
,
sortings
2000
x2634
1862C
Flower City Fence
binary search
,
data structures
,
implementation
,
sortings
1100
x19566
1860F
Evaluate RBS
data structures
,
geometry
,
implementation
,
math
,
sortings
2900
x263
1859D
Andrey and Escape from Capygrad
binary search
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1800
x6515
1859B
Olya and Game with Arrays
constructive algorithms
,
greedy
,
math
,
sortings
1000
x24137
1857G
Counting Graphs
combinatorics
,
divide and conquer
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2000
x4053
1857E
Power of Points
math
,
sortings
1500
x11436
1857D
Strong Vertices
math
,
sortings
,
trees
1300
x17579
1857C
Assembly via Minimums
greedy
,
sortings
1200
x22729
1852B
Imbalanced Arrays
constructive algorithms
,
graphs
,
greedy
,
math
,
sortings
,
two pointers
1800
x4127
1851G
Vlad and the Mountains
binary search
,
data structures
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
,
two pointers
2000
x2909
1851E
Nastya and Potions
dfs and similar
,
dp
,
graphs
,
sortings
1500
x9373
1851B
Parity Sort
greedy
,
sortings
,
two pointers
800
x27990
1850G
The Morning Star
combinatorics
,
data structures
,
geometry
,
implementation
,
math
,
sortings
1500
x11140
1850D
Balanced Round
brute force
,
greedy
,
implementation
,
sortings
900
x32078
1850B
Ten Words of Wisdom
implementation
,
sortings
800
x40150
1850A
To My Critics
implementation
,
sortings
800
x50735
1849B
Monsters
greedy
,
math
,
sortings
1000
x22541
1848B
Vika and the Bridge
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1200
x13292
1847F
The Boss's Identity
binary search
,
bitmasks
,
data structures
,
dfs and similar
,
greedy
,
math
,
sortings
2500
x851
←
1
2
3
...
10
11
→
User lists
Name