Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round 941 (Div. 1)
04:25:17
Register now »
*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
04:25:17
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
538E
Demiurges Play Again
dfs and similar
,
dp
,
math
,
trees
2200
x1496
76A
Gift
dsu
,
graphs
,
sortings
,
trees
2200
x1438
1901E
Compressed Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
2200
x1352
965E
Short Code
data structures
,
dp
,
greedy
,
strings
,
trees
2200
x1327
765E
Tree Folding
dfs and similar
,
dp
,
greedy
,
implementation
,
trees
2200
x1246
406D
Hill Climbing
dfs and similar
,
geometry
,
trees
2200
x1124
894D
Ralph And His Tour in Binary Country
brute force
,
data structures
,
trees
2200
x1105
733F
Drivers Dissatisfaction
data structures
,
dsu
,
graphs
,
trees
2200
x1088
575B
Bribes
dfs and similar
,
graphs
,
trees
2200
x1038
337E
Divisor Tree
brute force
,
number theory
,
trees
2200
x1003
690C3
Brain Network (hard)
trees
2200
x881
191E
Thwarting Demonstrations
binary search
,
data structures
,
trees
2200
x805
196C
Paint Tree
constructive algorithms
,
divide and conquer
,
geometry
,
sortings
,
trees
2200
x738
1773B
BinCoin
binary search
,
divide and conquer
,
hashing
,
implementation
,
probabilities
,
trees
2200
x729
382D
Ksenia and Pawns
dfs and similar
,
graphs
,
implementation
,
trees
2200
x650
1045D
Interstellar battle
math
,
probabilities
,
trees
2200
x634
440D
Berland Federalization
dp
,
trees
2200
x624
958B2
Maximum Control (medium)
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
2200
x612
85C
Petya and Tree
binary search
,
dfs and similar
,
probabilities
,
sortings
,
trees
2200
x521
916D
Jamie and To-do List
data structures
,
interactive
,
trees
2200
x487
97E
Leaders
dfs and similar
,
dsu
,
graphs
,
trees
2200
x370
98B
Help King
implementation
,
probabilities
,
trees
2200
x114
600E
Lomsat gelral
data structures
,
dfs and similar
,
dsu
,
trees
2300
x12601
1009F
Dominant Indices
data structures
,
dsu
,
trees
2300
x5076
708C
Centroids
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2300
x2973
543D
Road Improvement
dp
,
trees
2300
x2533
1528C
Trees of Tranquillity
data structures
,
dfs and similar
,
greedy
,
trees
2300
x2495
1494D
Dogeforces
constructive algorithms
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
sortings
,
trees
2300
x2489
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
x2480
817F
MEX Queries
binary search
,
data structures
,
trees
2300
x2391
1706E
Qpwoeirut and Vertices
binary search
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
trees
2300
x2352
1385F
Removing Leaves
data structures
,
greedy
,
implementation
,
trees
2300
x2243
1592D
Hemose in ICPC ?
binary search
,
dfs and similar
,
implementation
,
interactive
,
math
,
number theory
,
trees
2300
x2156
1916E
Happy Life in University
data structures
,
dfs and similar
,
greedy
,
trees
2300
x2087
1625D
Binary Spiders
bitmasks
,
data structures
,
implementation
,
math
,
sortings
,
trees
2300
x1964
1453E
Dog Snacks
binary search
,
dfs and similar
,
dp
,
greedy
,
trees
2300
x1964
652E
Pursuit For Artifacts
dfs and similar
,
dsu
,
graphs
,
trees
2300
x1947
1695D2
Tree Queries (Hard Version)
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2300
x1910
1380E
Merging Towers
data structures
,
dsu
,
implementation
,
trees
2300
x1909
1292C
Xenon's Attack on the Gangs
combinatorics
,
dfs and similar
,
dp
,
greedy
,
trees
2300
x1867
960E
Alternating Tree
combinatorics
,
dfs and similar
,
divide and conquer
,
dp
,
probabilities
,
trees
2300
x1807
1943C
Tree Compass
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2300
x1726
1062E
Company
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
2300
x1703
1748E
Yet Another Array Counting Problem
binary search
,
data structures
,
divide and conquer
,
dp
,
flows
,
math
,
trees
2300
x1696
1285E
Delete a Segment
brute force
,
constructive algorithms
,
data structures
,
dp
,
graphs
,
sortings
,
trees
,
two pointers
2300
x1660
893F
Subtree Minimum Query
data structures
,
trees
2300
x1657
1929F
Sasha and the Wedding Binary Search Tree
brute force
,
combinatorics
,
data structures
,
dfs and similar
,
math
,
trees
2300
x1605
1698E
PermutationForces II
brute force
,
combinatorics
,
greedy
,
sortings
,
trees
,
two pointers
2300
x1567
22E
Scheme
dfs and similar
,
graphs
,
trees
2300
x1531
1681F
Unique Occurrences
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
dsu
,
trees
2300
x1528
1805E
There Should Be a Lot of Maximums
brute force
,
data structures
,
dfs and similar
,
dp
,
trees
,
two pointers
2300
x1519
1929E
Sasha and the Happy Tree Cutting
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
2300
x1476
1843F2
Omsk Metro (hard version)
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
math
,
trees
2300
x1465
1594E2
Rubik's Cube Coloring (hard version)
brute force
,
dp
,
implementation
,
math
,
trees
2300
x1445
1878G
wxhtzdy ORO Tree
binary search
,
bitmasks
,
brute force
,
data structures
,
dfs and similar
,
implementation
,
trees
2300
x1086
557E
Ann and Half-Palindrome
data structures
,
dp
,
graphs
,
string suffix structures
,
strings
,
trees
2300
x1052
812E
Sagheer and Apple Tree
games
,
trees
2300
x1014
870E
Points, Lines and Ready-made Titles
dfs and similar
,
dsu
,
graphs
,
trees
2300
x974
629E
Famil Door and Roads
combinatorics
,
data structures
,
dfs and similar
,
dp
,
probabilities
,
trees
2300
x966
573C
Bear and Drawing
constructive algorithms
,
dfs and similar
,
trees
2300
x952
429C
Guess the Tree
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
trees
2300
x900
294E
Shaass the Great
dp
,
trees
2300
x889
566A
Matching Names
dfs and similar
,
strings
,
trees
2300
x869
935E
Fafa and Ancient Mathematics
dfs and similar
,
dp
,
trees
2300
x865
509F
Progress Monitoring
dp
,
trees
2300
x861
846E
Chemistry in Berland
dfs and similar
,
greedy
,
trees
2300
x850
87D
Beautiful Road
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
2300
x845
1575I
Illusions of the Desert
data structures
,
trees
2300
x838
414D
Mashmokh and Water Tanks
binary search
,
data structures
,
greedy
,
trees
,
two pointers
2300
x673
101D
Castle
dp
,
greedy
,
probabilities
,
sortings
,
trees
2300
x671
748F
Santa Clauses and a Soccer Championship
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2300
x633
1045C
Hyperspace Highways
dfs and similar
,
graphs
,
trees
2300
x620
852I
Dating
brute force
,
dfs and similar
,
graphs
,
trees
2300
x554
1252B
Cleaning Robots
dp
,
trees
2300
x501
856B
Similar Words
dp
,
hashing
,
strings
,
trees
2300
x475
1403B
Spring cleaning
*special problem
,
data structures
,
dfs and similar
,
graphs
,
trees
2300
x358
342E
Xenia and Tree
data structures
,
divide and conquer
,
trees
2400
x7595
375D
Tree and Queries
data structures
,
dfs and similar
,
trees
2400
x6172
1051F
The Shortest Statement
graphs
,
shortest paths
,
trees
2400
x2653
815C
Karen and Supermarket
brute force
,
dp
,
trees
2400
x2461
1709E
XOR Tree
bitmasks
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
2400
x2427
915F
Imbalance Value of a Tree
data structures
,
dsu
,
graphs
,
trees
2400
x2300
379F
New Year Tree
data structures
,
divide and conquer
,
trees
2400
x2111
1491E
Fib-tree
brute force
,
dfs and similar
,
divide and conquer
,
number theory
,
trees
2400
x2041
1408E
Avoid Rainbow Cycles
data structures
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2400
x1874
1527D
MEX Tree
combinatorics
,
dfs and similar
,
implementation
,
math
,
trees
2400
x1822
1720D2
Xor-Subsequence (hard version)
bitmasks
,
data structures
,
dp
,
strings
,
trees
2400
x1726
1761E
Make It Connected
binary search
,
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
matrices
,
trees
,
two pointers
2400
x1720
990G
GCD Counting
divide and conquer
,
dp
,
dsu
,
number theory
,
trees
2400
x1720
911F
Tree Destruction
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2400
x1556
916E
Jamie and Tree
data structures
,
trees
2400
x1551
1626E
Black and White Tree
dfs and similar
,
greedy
,
trees
2400
x1513
1633E
Spanning Tree Queries
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
,
trees
2400
x1455
1463E
Plan of Lectures
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
2400
x1437
1174F
Ehab and the Big Finale
constructive algorithms
,
divide and conquer
,
graphs
,
implementation
,
interactive
,
trees
2400
x1434
1088E
Ehab and a component choosing problem
dp
,
greedy
,
math
,
trees
2400
x1395
1615E
Purple Crayon
data structures
,
dfs and similar
,
games
,
graphs
,
greedy
,
math
,
sortings
,
trees
2400
x1394
1819C
The Fox and the Complete Tree Traversal
constructive algorithms
,
dp
,
implementation
,
math
,
trees
2400
x1385
1707C
DFS Trees
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2400
x1381
←
1
2
3
4
5
6
7
8
→
User lists
Name