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Problems
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Name
708C
Centroids
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2300
x3015
786B
Legacy
data structures
,
graphs
,
shortest paths
2300
x5470
345D
Chain Letter
*special problem
,
dfs and similar
,
graphs
2200
x76
182A
Battlefield
geometry
,
graphs
,
implementation
,
shortest paths
2200
x279
1970G2
Min-Fund Prison (Medium)
brute force
,
dfs and similar
,
dp
,
graphs
,
trees
2200
x336
323B
Tournament-graph
constructive algorithms
,
graphs
2200
x364
97E
Leaders
dfs and similar
,
dsu
,
graphs
,
trees
2200
x370
245G
Suggested Friends
brute force
,
graphs
2200
x423
134C
Swaps
constructive algorithms
,
graphs
,
greedy
2200
x459
1424M
Ancient Language
graphs
,
sortings
2200
x521
1184B2
The Doctor Meets Vader (Medium)
flows
,
graph matchings
,
graphs
,
shortest paths
,
sortings
2200
x567
73D
FreeDiv
dfs and similar
,
graphs
,
greedy
2200
x612
958B2
Maximum Control (medium)
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
2200
x616
382D
Ksenia and Pawns
dfs and similar
,
graphs
,
implementation
,
trees
2200
x653
350E
Wrong Floyd
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
2200
x750
225D
Snake
bitmasks
,
dfs and similar
,
graphs
,
implementation
2200
x912
274D
Lovely Matrix
dfs and similar
,
graphs
,
greedy
,
sortings
2200
x1006
575B
Bribes
dfs and similar
,
graphs
,
trees
2200
x1039
733F
Drivers Dissatisfaction
data structures
,
dsu
,
graphs
,
trees
2200
x1089
369D
Valera and Fools
dfs and similar
,
dp
,
graphs
,
shortest paths
2200
x1094
272E
Dima and Horses
combinatorics
,
constructive algorithms
,
graphs
2200
x1174
1765H
Hospital Queue
binary search
,
graphs
,
greedy
,
implementation
2200
x1193
1039C
Network Safety
dfs and similar
,
dsu
,
graphs
,
math
,
sortings
2200
x1312
821D
Okabe and City
dfs and similar
,
graphs
,
shortest paths
2200
x1347
1901E
Compressed Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
2200
x1383
1741G
Kirill and Company
bitmasks
,
brute force
,
dfs and similar
,
dp
,
flows
,
graphs
,
shortest paths
2200
x1426
1227E
Arson In Berland Forest
binary search
,
graphs
,
graphs
,
shortest paths
2200
x1444
662B
Graph Coloring
dfs and similar
,
graphs
2200
x1446
76A
Gift
dsu
,
graphs
,
sortings
,
trees
2200
x1454
1659E
AND-MEX Walk
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2200
x1468
453C
Little Pony and Summer Sun Celebration
constructive algorithms
,
dfs and similar
,
graphs
2200
x1570
612E
Square Root of Permutation
combinatorics
,
constructive algorithms
,
dfs and similar
,
graphs
,
math
2200
x1585
567E
President and Roads
dfs and similar
,
graphs
,
hashing
,
shortest paths
2200
x1646
1238F
The Maximum Subtree
dfs and similar
,
dp
,
graphs
,
trees
2200
x1692
1777E
Edge Reverse
binary search
,
dfs and similar
,
graphs
,
trees
2200
x1701
1763E
Node Pairs
dp
,
graphs
,
math
,
number theory
2200
x1702
1840F
Railguns
brute force
,
dfs and similar
,
dp
,
graphs
2200
x1713
553C
Love Triangles
dfs and similar
,
dsu
,
graphs
2200
x1736
1907G
Lights
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
2200
x1764
1737D
Ela and the Wiring Wizard
brute force
,
dp
,
graphs
,
greedy
,
implementation
,
shortest paths
2200
x1813
1498E
Two Houses
brute force
,
graphs
,
greedy
,
interactive
,
sortings
2200
x1840
1615D
X(or)-mas Tree
bitmasks
,
dfs and similar
,
dsu
,
graphs
,
trees
2200
x1843
1815C
Between
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2200
x1874
723E
One-Way Reform
constructive algorithms
,
dfs and similar
,
flows
,
graphs
,
greedy
2200
x1885
650C
Table Compression
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
2200
x1942
1335F
Robots on a Grid
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
matrices
2200
x1991
1461E
Water Level
brute force
,
graphs
,
greedy
,
implementation
,
math
2200
x2061
402E
Strictly Positive Matrix
graphs
,
math
2200
x2082
1583E
Moment of Bloom
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
greedy
,
trees
2200
x2165
1635E
Cars
2-sat
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
2200
x2168
1704E
Count Seconds
brute force
,
constructive algorithms
,
dp
,
graphs
,
implementation
,
math
2200
x2228
1498D
Bananas in a Microwave
dfs and similar
,
dp
,
graphs
,
implementation
2200
x2250
1070A
Find a Number
dp
,
graphs
,
number theory
,
shortest paths
2200
x2263
1100E
Andrew and Taxi
binary search
,
dfs and similar
,
graphs
2200
x2296
653D
Delivery Bears
binary search
,
flows
,
graphs
2200
x2346
592D
Super M
dfs and similar
,
dp
,
graphs
,
trees
2200
x2357
1537F
Figure Fixing
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
2200
x2361
27D
Ring Road 2
2-sat
,
dfs and similar
,
dsu
,
graphs
2200
x2370
1220E
Tourism
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
,
trees
2200
x2545
1334E
Divisor Paths
combinatorics
,
graphs
,
greedy
,
math
,
number theory
2200
x2632
1037E
Trips
graphs
2200
x2665
590C
Three States
dfs and similar
,
graphs
,
shortest paths
2200
x2672
1486E
Paired Payment
binary search
,
brute force
,
constructive algorithms
,
dp
,
flows
,
graphs
,
shortest paths
2200
x2800
1327D
Infinite Path
brute force
,
dfs and similar
,
graphs
,
math
,
number theory
2200
x3074
915D
Almost Acyclic Graph
dfs and similar
,
graphs
2200
x3291
1520G
To Go Or Not To Go?
brute force
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
shortest paths
2200
x3513
1470D
Strange Housing
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
greedy
2200
x3582
11D
A Simple Task
bitmasks
,
dp
,
graphs
2200
x4482
1407D
Discrete Centrifugal Jumps
data structures
,
dp
,
graphs
2200
x4635
1485D
Multiples and Power Differences
constructive algorithms
,
graphs
,
math
,
number theory
2200
x4947
570D
Tree Requests
binary search
,
bitmasks
,
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2200
x6700
45H
Road Problem
graphs
2100
x174
386D
Game with Points
dp
,
graphs
,
implementation
,
shortest paths
2100
x413
48E
Ivan the Fool VS Gorynych the Dragon
dp
,
games
,
graphs
2100
x563
362D
Fools and Foolproof Roads
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
2100
x896
1184E2
Daleks' Invasion (medium)
dfs and similar
,
graphs
,
shortest paths
,
trees
2100
x901
74C
Chessboard Billiard
dfs and similar
,
dsu
,
graphs
,
number theory
2100
x949
441D
Valera and Swaps
constructive algorithms
,
dsu
,
graphs
,
implementation
,
math
,
string suffix structures
2100
x1061
1971H
±1
2-sat
,
dfs and similar
,
graphs
2100
x1067
260D
Black and White Tree
constructive algorithms
,
dsu
,
graphs
,
greedy
,
trees
2100
x1315
746G
New Roads
constructive algorithms
,
graphs
,
trees
2100
x1319
190E
Counter Attack
data structures
,
dsu
,
graphs
,
hashing
,
sortings
2100
x1441
811D
Vladik and Favorite Game
constructive algorithms
,
dfs and similar
,
graphs
,
interactive
2100
x1526
231E
Cactus
data structures
,
dfs and similar
,
dp
,
graphs
,
trees
2100
x1547
276E
Little Girl and Problem on Trees
data structures
,
graphs
,
trees
2100
x1549
793D
Presents in Bankopolis
dp
,
graphs
,
shortest paths
2100
x1576
1005F
Berland and the Shortest Paths
brute force
,
dfs and similar
,
graphs
,
shortest paths
2100
x1617
269C
Flawed Flow
constructive algorithms
,
flows
,
graphs
,
greedy
2100
x1621
859E
Desk Disorder
combinatorics
,
dfs and similar
,
dsu
,
graphs
,
trees
2100
x1648
295C
Greg and Friends
combinatorics
,
dp
,
graphs
,
shortest paths
2100
x1659
1914G1
Light Bulbs (Easy Version)
brute force
,
combinatorics
,
dfs and similar
,
dp
,
dsu
,
graphs
,
math
,
trees
2100
x1683
1158C
Permutation recovery
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
math
,
sortings
2100
x1700
1811F
Is It Flower?
dfs and similar
,
graphs
,
implementation
2100
x1736
242D
Dispute
dfs and similar
,
graphs
,
greedy
2100
x1809
1900E
Transitive Graph
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
2100
x1841
875C
National Property
2-sat
,
dfs and similar
,
graphs
,
implementation
2100
x1921
912D
Fishes
data structures
,
graphs
,
greedy
,
probabilities
,
shortest paths
2100
x1956
1801D
The way home
binary search
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x2056
466E
Information Graph
dfs and similar
,
dsu
,
graphs
,
trees
2100
x2062
301B
Yaroslav and Time
binary search
,
graphs
,
shortest paths
2100
x2129
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