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dfs and similar
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
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Problems
#
Name
766E
Mahmoud and a xor trip
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
math
,
trees
2100
x2822
1466F
Euclid's nightmare
bitmasks
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
2100
x2794
771C
Bear and Tree Jumps
dfs and similar
,
dp
,
trees
2100
x2791
1654D
Potion Brewing Class
dfs and similar
,
math
,
number theory
,
trees
2100
x2779
1296F
Berland Beauty
constructive algorithms
,
dfs and similar
,
greedy
,
sortings
,
trees
2100
x2672
1863E
Speedrun
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
sortings
,
two pointers
2100
x2614
1771D
Hossam and (sub-)palindromic tree
brute force
,
data structures
,
dfs and similar
,
dp
,
strings
,
trees
2100
x2599
507E
Breaking Good
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2590
1942D
Learning to Paint
binary search
,
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
sortings
2100
x2417
1593F
Red-Black Number
dfs and similar
,
dp
,
implementation
,
math
,
meet-in-the-middle
2100
x2341
1650G
Counting Shortcuts
data structures
,
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2336
1213F
Unstable String Sort
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
strings
2100
x2334
780E
Underground Lab
constructive algorithms
,
dfs and similar
,
graphs
2100
x2294
788B
Weird journey
combinatorics
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2100
x2282
840B
Leha and another game about graph
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
graphs
2100
x2245
1598E
Staircases
brute force
,
combinatorics
,
data structures
,
dfs and similar
,
dp
,
implementation
,
math
2100
x2240
1933F
Turtle Mission: Robot and the Earthquake
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2198
1876C
Autosynthesis
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
sortings
2100
x2141
466E
Information Graph
dfs and similar
,
dsu
,
graphs
,
trees
2100
x2058
348B
Apple Tree
dfs and similar
,
number theory
,
trees
2100
x2045
875C
National Property
2-sat
,
dfs and similar
,
graphs
,
implementation
2100
x1921
1900E
Transitive Graph
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
2100
x1827
242D
Dispute
dfs and similar
,
graphs
,
greedy
2100
x1808
797D
Broken BST
data structures
,
dfs and similar
2100
x1750
1811F
Is It Flower?
dfs and similar
,
graphs
,
implementation
2100
x1728
1158C
Permutation recovery
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
math
,
sortings
2100
x1697
1914G1
Light Bulbs (Easy Version)
brute force
,
combinatorics
,
dfs and similar
,
dp
,
dsu
,
graphs
,
math
,
trees
2100
x1675
859E
Desk Disorder
combinatorics
,
dfs and similar
,
dsu
,
graphs
,
trees
2100
x1647
1005F
Berland and the Shortest Paths
brute force
,
dfs and similar
,
graphs
,
shortest paths
2100
x1611
576B
Invariance of Tree
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2100
x1572
231E
Cactus
data structures
,
dfs and similar
,
dp
,
graphs
,
trees
2100
x1539
811D
Vladik and Favorite Game
constructive algorithms
,
dfs and similar
,
graphs
,
interactive
2100
x1526
463E
Caisa and Tree
brute force
,
dfs and similar
,
math
,
number theory
,
trees
2100
x1386
1146D
Frog Jumping
dfs and similar
,
math
,
number theory
2100
x1080
238C
World Eater Brothers
dfs and similar
,
dp
,
greedy
,
trees
2100
x1021
730C
Bulmart
binary search
,
dfs and similar
2100
x1004
77C
Beavermuncher-0xFF
dfs and similar
,
dp
,
dsu
,
greedy
,
trees
2100
x977
74C
Chessboard Billiard
dfs and similar
,
dsu
,
graphs
,
number theory
2100
x949
1184E2
Daleks' Invasion (medium)
dfs and similar
,
graphs
,
shortest paths
,
trees
2100
x898
362D
Fools and Foolproof Roads
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
2100
x895
838B
Diverging Directions
data structures
,
dfs and similar
,
trees
2100
x700
1387A
Graph
*special problem
,
binary search
,
dfs and similar
,
dp
,
math
,
ternary search
2100
x671
1218I
The Light Square
2-sat
,
dfs and similar
,
greedy
2100
x571
60C
Mushroom Strife
brute force
,
dfs and similar
2100
x549
342D
Xenia and Dominoes
bitmasks
,
dfs and similar
,
dp
2100
x487
100H
Battleship
*special problem
,
dfs and similar
,
implementation
2100
x74
570D
Tree Requests
binary search
,
bitmasks
,
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2200
x6678
165E
Compatible Numbers
bitmasks
,
brute force
,
dfs and similar
,
dp
2200
x6201
1156D
0-1-Tree
dfs and similar
,
divide and conquer
,
dp
,
dsu
,
trees
2200
x3682
1470D
Strange Housing
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
greedy
2200
x3578
1520G
To Go Or Not To Go?
brute force
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
shortest paths
2200
x3502
1656E
Equal Tree Sums
constructive algorithms
,
dfs and similar
,
math
,
trees
2200
x3297
915D
Almost Acyclic Graph
dfs and similar
,
graphs
2200
x3286
1175E
Minimal Segment Cover
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
implementation
,
trees
2200
x3200
1327D
Infinite Path
brute force
,
dfs and similar
,
graphs
,
math
,
number theory
2200
x3069
1806E
Tree Master
brute force
,
data structures
,
dfs and similar
,
trees
2200
x2685
590C
Three States
dfs and similar
,
graphs
,
shortest paths
2200
x2612
707D
Persistent Bookcase
bitmasks
,
data structures
,
dfs and similar
,
implementation
2200
x2599
1220E
Tourism
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
,
trees
2200
x2542
1788E
Sum Over Zero
data structures
,
dfs and similar
,
dp
2200
x2475
505D
Mr. Kitayuta's Technology
dfs and similar
2200
x2424
27D
Ring Road 2
2-sat
,
dfs and similar
,
dsu
,
graphs
2200
x2361
1537F
Figure Fixing
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
2200
x2359
592D
Super M
dfs and similar
,
dp
,
graphs
,
trees
2200
x2354
1100E
Andrew and Taxi
binary search
,
dfs and similar
,
graphs
2200
x2291
1498D
Bananas in a Microwave
dfs and similar
,
dp
,
graphs
,
implementation
2200
x2250
1399E2
Weights Division (hard version)
binary search
,
dfs and similar
,
greedy
,
sortings
,
trees
,
two pointers
2200
x2219
1635E
Cars
2-sat
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
2200
x2168
1583E
Moment of Bloom
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
greedy
,
trees
2200
x2160
1695D1
Tree Queries (Easy Version)
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2200
x2090
1335F
Robots on a Grid
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
matrices
2200
x1988
622E
Ants in Leaves
dfs and similar
,
greedy
,
sortings
,
trees
2200
x1986
650C
Table Compression
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
2200
x1940
1800G
Symmetree
dfs and similar
,
hashing
,
implementation
,
trees
2200
x1932
1178F1
Short Colorful Strip
combinatorics
,
dfs and similar
,
dp
2200
x1919
723E
One-Way Reform
constructive algorithms
,
dfs and similar
,
flows
,
graphs
,
greedy
2200
x1883
1815C
Between
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2200
x1856
1615D
X(or)-mas Tree
bitmasks
,
dfs and similar
,
dsu
,
graphs
,
trees
2200
x1839
1721E
Prefix Function Queries
dfs and similar
,
dp
,
hashing
,
string suffix structures
,
strings
,
trees
2200
x1811
1907G
Lights
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
2200
x1748
1551F
Equidistant Vertices
brute force
,
combinatorics
,
dfs and similar
,
dp
,
trees
2200
x1748
1278E
Tests for problem D
constructive algorithms
,
dfs and similar
,
divide and conquer
,
trees
2200
x1737
553C
Love Triangles
dfs and similar
,
dsu
,
graphs
2200
x1734
1840F
Railguns
brute force
,
dfs and similar
,
dp
,
graphs
2200
x1704
1777E
Edge Reverse
binary search
,
dfs and similar
,
graphs
,
trees
2200
x1697
1238F
The Maximum Subtree
dfs and similar
,
dp
,
graphs
,
trees
2200
x1688
618D
Hamiltonian Spanning Tree
dfs and similar
,
dp
,
graph matchings
,
greedy
,
trees
2200
x1685
1670E
Hemose on the Tree
bitmasks
,
constructive algorithms
,
dfs and similar
,
trees
2200
x1671
567E
President and Roads
dfs and similar
,
graphs
,
hashing
,
shortest paths
2200
x1642
804C
Ice cream coloring
constructive algorithms
,
dfs and similar
,
greedy
2200
x1612
612E
Square Root of Permutation
combinatorics
,
constructive algorithms
,
dfs and similar
,
graphs
,
math
2200
x1580
453C
Little Pony and Summer Sun Celebration
constructive algorithms
,
dfs and similar
,
graphs
2200
x1568
490F
Treeland Tour
data structures
,
dfs and similar
,
dp
,
trees
2200
x1552
538E
Demiurges Play Again
dfs and similar
,
dp
,
math
,
trees
2200
x1499
1926F
Vlad and Avoiding X
bitmasks
,
brute force
,
dfs and similar
,
dp
,
implementation
2200
x1485
1659E
AND-MEX Walk
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2200
x1466
448E
Divisors
brute force
,
dfs and similar
,
implementation
,
number theory
2200
x1446
662B
Graph Coloring
dfs and similar
,
graphs
2200
x1445
1741G
Kirill and Company
bitmasks
,
brute force
,
dfs and similar
,
dp
,
flows
,
graphs
,
shortest paths
2200
x1421
1901E
Compressed Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
2200
x1370
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