Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round 941 (Div. 1)
24:33:30
Register now »
*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
24:33:30
Register now »
*has extra registration
→ Filter Problems
Difficulty:
—
trees
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
1790F
Timofey and Black-White Tree
brute force
,
dfs and similar
,
divide and conquer
,
graphs
,
greedy
,
math
,
shortest paths
,
trees
2100
x3136
1923E
Count Paths
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
trees
2000
x3107
474E
Pillars
binary search
,
data structures
,
dp
,
sortings
,
trees
2000
x3091
722D
Generating Sets
binary search
,
data structures
,
dfs and similar
,
greedy
,
strings
,
trees
1900
x3073
500D
New Year Santa Network
combinatorics
,
dfs and similar
,
graphs
,
trees
1900
x3061
1714F
Build a Tree and That Is It
constructive algorithms
,
implementation
,
trees
1900
x3055
6E
Exposition
binary search
,
data structures
,
dsu
,
trees
,
two pointers
1900
x2984
708C
Centroids
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2300
x2973
1060E
Sergey and Subway
dfs and similar
,
dp
,
trees
2000
x2972
796C
Bank Hacking
constructive algorithms
,
data structures
,
dp
,
trees
1900
x2964
1851G
Vlad and the Mountains
binary search
,
data structures
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
,
two pointers
2000
x2902
792D
Paths in a Complete Binary Tree
bitmasks
,
trees
1900
x2897
1926G
Vlad and Trouble at MIT
dfs and similar
,
dp
,
flows
,
graphs
,
greedy
,
implementation
,
trees
1900
x2891
1899G
Unusual Entertainment
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
sortings
,
trees
,
two pointers
1900
x2885
665E
Beautiful Subarrays
data structures
,
divide and conquer
,
strings
,
trees
2100
x2854
1547G
How Many Paths?
dfs and similar
,
dp
,
graphs
,
trees
2100
x2834
1605D
Treelabeling
bitmasks
,
constructive algorithms
,
dfs and similar
,
games
,
greedy
,
implementation
,
trees
2100
x2832
1815B
Sum Graph
brute force
,
constructive algorithms
,
graphs
,
implementation
,
interactive
,
shortest paths
,
trees
2000
x2825
766E
Mahmoud and a xor trip
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
math
,
trees
2100
x2803
771C
Bear and Tree Jumps
dfs and similar
,
dp
,
trees
2100
x2785
1654D
Potion Brewing Class
dfs and similar
,
math
,
number theory
,
trees
2100
x2774
963B
Destruction of a Tree
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2000
x2693
817E
Choosing The Commander
bitmasks
,
data structures
,
trees
2000
x2681
1913D
Array Collapse
data structures
,
divide and conquer
,
dp
,
trees
2100
x2675
1806E
Tree Master
brute force
,
data structures
,
dfs and similar
,
trees
2200
x2671
1296F
Berland Beauty
constructive algorithms
,
dfs and similar
,
greedy
,
sortings
,
trees
2100
x2668
1051F
The Shortest Statement
graphs
,
shortest paths
,
trees
2400
x2653
613D
Kingdom and its Cities
dfs and similar
,
divide and conquer
,
dp
,
graphs
,
sortings
,
trees
2800
x2646
1671E
Preorder
combinatorics
,
divide and conquer
,
dp
,
dsu
,
hashing
,
sortings
,
trees
2100
x2639
1142B
Lynyrd Skynyrd
data structures
,
dfs and similar
,
dp
,
math
,
trees
2000
x2636
1535E
Gold Transfer
binary search
,
data structures
,
dp
,
greedy
,
interactive
,
trees
2200
x2628
1771D
Hossam and (sub-)palindromic tree
brute force
,
data structures
,
dfs and similar
,
dp
,
strings
,
trees
2100
x2587
436C
Dungeons and Candies
dsu
,
graphs
,
greedy
,
trees
1800
x2578
1220E
Tourism
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
,
trees
2200
x2540
543D
Road Improvement
dp
,
trees
2300
x2530
1559D2
Mocha and Diana (Hard Version)
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
,
two pointers
2500
x2523
1223E
Paint the Tree
dp
,
sortings
,
trees
2100
x2515
1214E
Petya and Construction Set
constructive algorithms
,
graphs
,
math
,
sortings
,
trees
2000
x2505
1528C
Trees of Tranquillity
data structures
,
dfs and similar
,
greedy
,
trees
2300
x2494
1494D
Dogeforces
constructive algorithms
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
sortings
,
trees
2300
x2488
1540B
Tree Array
brute force
,
combinatorics
,
dp
,
graphs
,
math
,
probabilities
,
trees
2300
x2483
1824B2
LuoTianyi and the Floating Islands (Hard Version)
combinatorics
,
dfs and similar
,
math
,
probabilities
,
trees
2300
x2479
1280C
Jeremy Bearimy
dfs and similar
,
graphs
,
greedy
,
trees
2000
x2477
815C
Karen and Supermarket
brute force
,
dp
,
trees
2400
x2461
1864E
Guess Game
bitmasks
,
data structures
,
games
,
math
,
probabilities
,
sortings
,
strings
,
trees
2100
x2459
741D
Arpa’s letter-marked tree and Mehrdad’s Dokhtar-kosh paths
data structures
,
dfs and similar
,
trees
2900
x2436
1709E
XOR Tree
bitmasks
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
2400
x2426
817F
MEX Queries
binary search
,
data structures
,
trees
2300
x2391
592D
Super M
dfs and similar
,
dp
,
graphs
,
trees
2200
x2353
1706E
Qpwoeirut and Vertices
binary search
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
trees
2300
x2352
1010D
Mars rover
dfs and similar
,
graphs
,
implementation
,
trees
2000
x2338
1152D
Neko and Aki's Prank
dp
,
greedy
,
trees
2100
x2332
915F
Imbalance Value of a Tree
data structures
,
dsu
,
graphs
,
trees
2400
x2299
533B
Work Group
dfs and similar
,
dp
,
graphs
,
strings
,
trees
2000
x2299
29D
Ant on the Tree
constructive algorithms
,
dfs and similar
,
trees
2000
x2290
615C
Running Track
dp
,
greedy
,
strings
,
trees
2000
x2251
982D
Shark
brute force
,
data structures
,
dsu
,
trees
1900
x2244
1385F
Removing Leaves
data structures
,
greedy
,
implementation
,
trees
2300
x2243
1399E2
Weights Division (hard version)
binary search
,
dfs and similar
,
greedy
,
sortings
,
trees
,
two pointers
2200
x2207
555E
Case of Computer Network
dfs and similar
,
graphs
,
trees
2800
x2185
1141G
Privatization of Roads in Treeland
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x2183
1583E
Moment of Bloom
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
greedy
,
trees
2200
x2160
1592D
Hemose in ICPC ?
binary search
,
dfs and similar
,
implementation
,
interactive
,
math
,
number theory
,
trees
2300
x2156
1311E
Construct the Binary Tree
brute force
,
constructive algorithms
,
trees
2200
x2131
814D
An overnight dance in discotheque
dfs and similar
,
dp
,
geometry
,
greedy
,
trees
2000
x2124
487E
Tourists
data structures
,
dfs and similar
,
graphs
,
trees
3200
x2114
379F
New Year Tree
data structures
,
divide and conquer
,
trees
2400
x2110
1837E
Playoff Fixing
combinatorics
,
trees
2200
x2091
1249F
Maximum Weight Subset
dp
,
trees
2200
x2085
1916E
Happy Life in University
data structures
,
dfs and similar
,
greedy
,
trees
2300
x2084
1695D1
Tree Queries (Easy Version)
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2200
x2081
466E
Information Graph
dfs and similar
,
dsu
,
graphs
,
trees
2100
x2055
1491E
Fib-tree
brute force
,
dfs and similar
,
divide and conquer
,
number theory
,
trees
2400
x2041
348B
Apple Tree
dfs and similar
,
number theory
,
trees
2100
x2039
1181D
Irrigation
binary search
,
data structures
,
implementation
,
sortings
,
trees
,
two pointers
2200
x2017
540E
Infinite Inversions
binary search
,
data structures
,
implementation
,
sortings
,
trees
2100
x2005
452B
4-point polyline
brute force
,
constructive algorithms
,
geometry
,
trees
1800
x1976
855C
Helga Hufflepuff's Cup
dp
,
trees
2000
x1974
622E
Ants in Leaves
dfs and similar
,
greedy
,
sortings
,
trees
2200
x1974
1453E
Dog Snacks
binary search
,
dfs and similar
,
dp
,
greedy
,
trees
2300
x1964
1625D
Binary Spiders
bitmasks
,
data structures
,
implementation
,
math
,
sortings
,
trees
2300
x1963
1179C
Serge and Dining Room
binary search
,
data structures
,
graph matchings
,
greedy
,
implementation
,
math
,
trees
2200
x1946
652E
Pursuit For Artifacts
dfs and similar
,
dsu
,
graphs
,
trees
2300
x1946
547E
Mike and Friends
data structures
,
string suffix structures
,
strings
,
trees
2800
x1930
1800G
Symmetree
dfs and similar
,
hashing
,
implementation
,
trees
2200
x1918
715C
Digit Tree
dfs and similar
,
divide and conquer
,
dsu
,
trees
2700
x1913
1695D2
Tree Queries (Hard Version)
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2300
x1910
1380E
Merging Towers
data structures
,
dsu
,
implementation
,
trees
2300
x1905
761E
Dasha and Puzzle
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2000
x1890
1408E
Avoid Rainbow Cycles
data structures
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2400
x1874
1292C
Xenon's Attack on the Gangs
combinatorics
,
dfs and similar
,
dp
,
greedy
,
trees
2300
x1867
1615D
X(or)-mas Tree
bitmasks
,
dfs and similar
,
dsu
,
graphs
,
trees
2200
x1836
1416D
Graph and Queries
data structures
,
dsu
,
graphs
,
implementation
,
trees
2600
x1826
1527D
MEX Tree
combinatorics
,
dfs and similar
,
implementation
,
math
,
trees
2400
x1822
960E
Alternating Tree
combinatorics
,
dfs and similar
,
divide and conquer
,
dp
,
probabilities
,
trees
2300
x1807
1721E
Prefix Function Queries
dfs and similar
,
dp
,
hashing
,
string suffix structures
,
strings
,
trees
2200
x1805
1521D
Nastia Plays with a Tree
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
trees
2500
x1801
980E
The Number Games
data structures
,
greedy
,
trees
2200
x1795
1551F
Equidistant Vertices
brute force
,
combinatorics
,
dfs and similar
,
dp
,
trees
2200
x1740
1278E
Tests for problem D
constructive algorithms
,
dfs and similar
,
divide and conquer
,
trees
2200
x1735
←
1
2
3
4
5
...
7
8
→
User lists
Name