cf
/
mirror
Problemset
Contests
Favorites
Profile
Tools
Settings
Problemset
Contests
Favorites
Profile
Complexity
Stress
Graph
Templates
Crawler
11,311
/11,320 captured
·
📄
81
PDFs
⊘
0
skipped
9 remaining
100%
Problemset
112 problems · filtered by 3 tags
Newest first
Oldest first
Rating ↑
Rating ↓
Most solved
Fewest solved
✓
#
Name
✎
Rating
↕
Solved
↕
2244F
Anya Loves Trees!
dfs and similar
dp
greedy
trees
+
unrated
3.5k
2232D
Magical Tiered Cake
constructive algorithms
dfs and similar
dp
greedy
+
2000
2.7k
2228C2
Cirno and Number (Hard Version)
binary search
dfs and similar
dp
greedy
implementation
+
1600
6.1k
2219C
Coloring a Red Black Tree
dfs and similar
dp
greedy
math
probabilities
trees
+
2300
1.4k
2193H
Remove the Grail Tree
dfs and similar
dp
graphs
greedy
implementation
trees
+
2400
1.1k
2189F
Zhora the Vacuum Cleaner
data structures
dfs and similar
dp
greedy
implementation
sortings
trees
+
2800
254
2176E
Remove at the lowest cost
data structures
dfs and similar
dp
dsu
greedy
implementation
trees
+
2400
1.3k
2157G
Isaac's Queries
bitmasks
brute force
constructive algorithms
dfs and similar
divide and conquer
dp
greedy
interactive
math
probabilities
+
2800
672
2152H1
Victorious Coloring (Easy Version)
dfs and similar
dp
greedy
+
2900
1.8k
2145F
Long Journey
dfs and similar
divide and conquer
dp
graphs
greedy
math
matrices
number theory
+
2500
1.1k
2133E
I Yearned For The Mines
constructive algorithms
dfs and similar
dp
greedy
trees
+
2500
1.8k
2127H
23 Rises Again
brute force
dfs and similar
dp
flows
graph matchings
graphs
greedy
implementation
probabilities
trees
+
3100
1.9k
2119F
Volcanic Eruptions
dfs and similar
dp
greedy
shortest paths
trees
+
3300
191
2115B
Gellyfish and Camellia Japonica
brute force
constructive algorithms
dfs and similar
dp
graphs
greedy
trees
+
2100
5k
2114E
Kirei Attacks the Estate
dfs and similar
dp
greedy
trees
+
1400
14.4k
2110D
Fewer Batteries
binary search
dfs and similar
dp
graphs
greedy
hashing
+
1700
8.8k
2106F
Goblin
dfs and similar
dp
dsu
greedy
math
+
1900
4.5k
2097E
Clearing the Snowdrift
data structures
dfs and similar
dp
greedy
+
3100
287
2086C
Disappearing Permutation
dfs and similar
dp
dsu
graphs
greedy
implementation
+
1300
16.6k
2086E
Zebra-like Numbers
bitmasks
brute force
constructive algorithms
dfs and similar
dp
greedy
math
+
2400
1.7k
2071C
Trapmigiano Reggiano
constructive algorithms
data structures
dfs and similar
dp
greedy
sortings
trees
+
1700
9.9k
2063C
Remove Exactly Two
brute force
data structures
dfs and similar
dp
graphs
greedy
sortings
trees
+
1600
15.1k
2063E
Triangle Tree
data structures
dfs and similar
dp
greedy
trees
+
2300
2.4k
2062D
Balanced Tree
dfs and similar
dp
graphs
greedy
trees
+
2200
3.6k
2053E
Resourceful Caterpillar Sequence
dfs and similar
dp
games
graphs
greedy
trees
+
1900
4.6k
2040E
Control of Randomness
combinatorics
dfs and similar
dp
graphs
greedy
math
probabilities
trees
+
2100
2.8k
2033G
Sakurako and Chefir
data structures
dfs and similar
dp
greedy
trees
+
2200
2k
2031D
Penchick and Desert Rabbit
binary search
data structures
dfs and similar
dp
dsu
greedy
implementation
two pointers
+
1700
10.1k
2031E
Penchick and Chloe's Trees
data structures
dfs and similar
dp
greedy
implementation
math
sortings
trees
+
2100
2.8k
2028E
Alice's Adventures in the Rabbit Hole
combinatorics
dfs and similar
dp
games
greedy
math
probabilities
trees
+
2300
2k
2027C
Add Zeros
brute force
data structures
dfs and similar
dp
graphs
greedy
+
1500
14.1k
2025F
Choose Your Queries
constructive algorithms
dfs and similar
dp
graphs
greedy
trees
+
2700
1.1k
2021E1
Digital Village (Easy Version)
brute force
data structures
dfs and similar
dp
dsu
fft
graphs
greedy
implementation
math
trees
+
2300
2k
2021E3
Digital Village (Extreme Version)
data structures
dfs and similar
dp
dsu
graphs
greedy
math
trees
+
2800
725
2014F
Sheriff's Defense
dfs and similar
dp
greedy
trees
+
2000
5.3k
2003D2
Turtle and a MEX Problem (Hard Version)
dfs and similar
dp
graphs
greedy
implementation
math
+
2100
4.7k
1997D
Maximize the Root
binary search
dfs and similar
dp
greedy
trees
+
1500
16.3k
1976F
Remove Bridges
data structures
dfs and similar
dp
greedy
sortings
trees
+
2800
893
1975D
Paint the Tree
brute force
dfs and similar
dp
greedy
shortest paths
trees
+
1700
7.6k
1949C
Annual Ants' Gathering
dfs and similar
dp
greedy
trees
+
1900
2.6k
1942D
Learning to Paint
binary search
data structures
dfs and similar
dp
greedy
implementation
sortings
+
2100
3.4k
1929E
Sasha and the Happy Tree Cutting
bitmasks
brute force
dfs and similar
dp
graphs
greedy
math
trees
+
2300
2.1k
1926G
Vlad and Trouble at MIT
dfs and similar
dp
flows
graphs
greedy
implementation
trees
+
1900
4.7k
1914F
Programming Competition
dfs and similar
dp
graph matchings
greedy
trees
+
1900
5.1k
1901E
Compressed Tree
dfs and similar
dp
graphs
greedy
sortings
trees
+
2200
2k
1895E
Infinite Card Game
binary search
brute force
data structures
dfs and similar
dp
dsu
games
graphs
greedy
sortings
two pointers
+
2300
1.9k
1882D
Tree XOR
bitmasks
dfs and similar
dp
greedy
trees
+
1900
7.3k
1863E
Speedrun
brute force
dfs and similar
dp
graphs
greedy
math
sortings
two pointers
+
2100
3.3k
1856E2
PermuTree (hard version)
bitmasks
dfs and similar
dp
fft
greedy
implementation
math
trees
+
2700
1.8k
1843F1
Omsk Metro (simple version)
data structures
dfs and similar
dp
graphs
greedy
math
trees
+
1800
6.5k
1839E
Decreasing Game
constructive algorithms
dfs and similar
dp
greedy
interactive
+
2400
1.6k
1833G
Ksyusha and Chinchilla
constructive algorithms
dfs and similar
dp
dsu
greedy
implementation
trees
+
1800
6.5k
1824C
LuoTianyi and XOR-Tree
data structures
dfs and similar
dp
dsu
greedy
trees
+
2500
1.7k
1805D
A Wide, Wide Graph
dfs and similar
dp
graphs
greedy
trees
+
1800
9.6k
1796E
Colored Subgraphs
dfs and similar
dp
games
greedy
trees
+
2500
1.1k
1774E
Two Chess Pieces
dfs and similar
dp
greedy
trees
+
1900
4k
1746D
Paths on the Tree
dfs and similar
dp
greedy
sortings
trees
+
1900
5.2k
1740E
Hanging Hearts
constructive algorithms
data structures
dfs and similar
dp
greedy
trees
+
1800
5.1k
1695D1
Tree Queries (Easy Version)
brute force
constructive algorithms
dfs and similar
dp
greedy
trees
+
2200
2.5k
1695D2
Tree Queries (Hard Version)
constructive algorithms
dfs and similar
dp
greedy
trees
+
2300
2.3k
1693B
Fake Plastic Trees
dfs and similar
dp
greedy
trees
+
1700
9.7k
1675F
Vlad and Unfinished Business
dfs and similar
dp
greedy
trees
+
1800
6.4k
1661B
Getting Zero
bitmasks
brute force
dfs and similar
dp
graphs
greedy
shortest paths
+
1300
21.1k
1637F
Towers
constructive algorithms
dfs and similar
dp
greedy
trees
+
2500
2.2k
1611E2
Escape The Maze (hard version)
dfs and similar
dp
greedy
shortest paths
trees
+
1900
4.4k
1608C
Game Master
data structures
dfs and similar
dp
graphs
greedy
two pointers
+
1700
7.4k
1593B
Make it Divisible by 25
dfs and similar
dp
greedy
math
+
900
43.1k
1566E
Buds Re-hanging
constructive algorithms
dfs and similar
dp
greedy
trees
+
2000
4.5k
1560F2
Nearest Beautiful Number (hard version)
bitmasks
brute force
constructive algorithms
dfs and similar
dp
greedy
+
2100
5.1k
1549B
Gregor and the Pawn Game
dfs and similar
dp
flows
graph matchings
graphs
greedy
implementation
+
800
27.2k
1534F2
Falling Sand (Hard Version)
dfs and similar
dp
graphs
greedy
+
3000
790
1528A
Parsa's Humongous Tree
dfs and similar
divide and conquer
dp
greedy
trees
+
1600
19.8k
1521D
Nastia Plays with a Tree
constructive algorithms
data structures
dfs and similar
dp
dsu
greedy
implementation
trees
+
2500
2.4k
1485E
Move and Swap
dfs and similar
dp
greedy
trees
+
2500
1.6k
1453E
Dog Snacks
binary search
dfs and similar
dp
greedy
trees
+
2300
2.3k
1442E
Black, White and Grey Tree
binary search
constructive algorithms
dfs and similar
dp
greedy
trees
+
3000
805
1407E
Egor in the Republic of Dagestan
constructive algorithms
dfs and similar
dp
graphs
greedy
shortest paths
+
2500
2k
1401D
Maximum Distributed Tree
dfs and similar
dp
greedy
implementation
math
number theory
sortings
trees
+
1800
10.7k
1381D
The Majestic Brown Tree Snake
dfs and similar
dp
greedy
trees
two pointers
+
3000
832
1379C
Choosing flowers
binary search
brute force
data structures
dfs and similar
dp
greedy
sortings
two pointers
+
2000
6.2k
1367E
Necklace Assembly
brute force
dfs and similar
dp
graphs
greedy
number theory
+
1900
5.9k
1363E
Tree Shuffling
dfs and similar
dp
greedy
trees
+
2000
7.6k
1336A
Linova and Kingdom
dfs and similar
dp
greedy
sortings
trees
+
1600
25.5k
1294F
Three Paths on a Tree
dfs and similar
dp
greedy
trees
+
2000
7.2k
1292C
Xenon's Attack on the Gangs
combinatorics
dfs and similar
dp
greedy
trees
+
2300
2.4k
1285D
Dr. Evil Underscores
bitmasks
brute force
dfs and similar
divide and conquer
dp
greedy
strings
trees
+
1900
8.7k
1220E
Tourism
dfs and similar
dp
dsu
graphs
greedy
trees
+
2200
3.1k
1208F
Bits And Pieces
bitmasks
dfs and similar
dp
greedy
+
2600
3.5k
1175E
Minimal Segment Cover
data structures
dfs and similar
divide and conquer
dp
greedy
implementation
trees
+
2200
4.7k
1153D
Serval and Rooted Tree
binary search
dfs and similar
dp
greedy
trees
+
1900
5.6k
1132E
Knapsack
dfs and similar
dp
greedy
+
2300
2.1k
1131D
Gourmet choice
dfs and similar
dp
dsu
graphs
greedy
+
2000
3.7k
1120D
Power Tree
dfs and similar
dp
dsu
graphs
greedy
trees
+
2500
1.8k
1073F
Choosing Two Paths
dfs and similar
dp
greedy
trees
+
2500
668
1056D
Decorate Apple Tree
constructive algorithms
dfs and similar
dp
graphs
greedy
sortings
trees
+
1600
6.8k
990F
Flow Control
dfs and similar
dp
greedy
trees
+
2400
1.1k
982C
Cut 'em all!
dfs and similar
dp
graphs
greedy
trees
+
1500
16.6k
963B
Destruction of a Tree
constructive algorithms
dfs and similar
dp
greedy
trees
+
2000
3k
910A
The Way to Home
dfs and similar
dp
greedy
implementation
+
800
14.3k
909E
Coprocessor
dfs and similar
dp
graphs
greedy
+
1900
2.5k
←
1
2
→
Jump to
Go
of 2
showing 1–100 of 112