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Problems
#
Name
1393D
Rarity and New Dress
dfs and similar
,
dp
,
implementation
,
shortest paths
2100
x3770
1392G
Omkar and Pies
bitmasks
,
dfs and similar
,
dp
,
math
,
shortest paths
2900
x442
1387C
Viruses
*special problem
,
dp
,
shortest paths
,
string suffix structures
2900
x125
1370F2
The Hidden Pair (Hard Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2700
x1246
1370F1
The Hidden Pair (Easy Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2400
x1367
1365D
Solve The Maze
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
shortest paths
1700
x16199
1360E
Polygon
dp
,
graphs
,
implementation
,
shortest paths
1300
x24463
1349C
Orac and Game of Life
dfs and similar
,
graphs
,
implementation
,
shortest paths
2000
x4238
1343E
Weights Distributing
brute force
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x4818
1340C
Nastya and Unexpected Guest
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x2021
1325E
Ehab's REAL Number Theory Problem
brute force
,
dfs and similar
,
graphs
,
number theory
,
shortest paths
2600
x1853
1320E
Treeland and Viruses
data structures
,
dfs and similar
,
dp
,
shortest paths
,
trees
3000
x667
1320B
Navigation System
dfs and similar
,
graphs
,
shortest paths
1700
x5806
1307G
Cow and Exercise
flows
,
graphs
,
shortest paths
3100
x479
1307D
Cow and Fields
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
sortings
1900
x6035
1304E
1-Trees and Queries
data structures
,
dfs and similar
,
shortest paths
,
trees
2000
x4930
1301F
Super Jaber
dfs and similar
,
graphs
,
implementation
,
shortest paths
2600
x1089
1283D
Christmas Trees
graphs
,
greedy
,
shortest paths
1800
x7461
1272E
Nearest Opposite Parity
dfs and similar
,
graphs
,
shortest paths
1900
x5873
1253F
Cheap Robot
binary search
,
dsu
,
graphs
,
shortest paths
,
trees
2500
x1584
1250I
Show Must Go On
binary search
,
brute force
,
greedy
,
shortest paths
3100
x127
1249E
By Elevator or Stairs?
dp
,
shortest paths
1700
x9242
1245E
Hyakugoku and Ladders
dp
,
probabilities
,
shortest paths
2300
x1109
1245D
Shichikuji and Power Grid
dsu
,
graphs
,
greedy
,
shortest paths
,
trees
1900
x6926
1227E
Arson In Berland Forest
binary search
,
graphs
,
graphs
,
shortest paths
2200
x1444
1218G
Alpha planetary system
constructive algorithms
,
graphs
,
shortest paths
3000
x87
1209F
Koala and Notebook
data structures
,
dfs and similar
,
graphs
,
shortest paths
,
strings
,
trees
2600
x1100
1205B
Shortest Cycle
bitmasks
,
brute force
,
graphs
,
shortest paths
1900
x6362
1204C
Anna, Svyatoslav and Maps
dp
,
graphs
,
greedy
,
shortest paths
1700
x6463
1202B
You Are Given a Decimal String...
brute force
,
dp
,
shortest paths
1700
x4502
1201E2
Knightmare (hard)
graphs
,
interactive
,
shortest paths
3000
x140
1201E1
Knightmare (easy)
graphs
,
interactive
,
shortest paths
2900
x125
1197E
Culture Code
binary search
,
combinatorics
,
data structures
,
dp
,
shortest paths
,
sortings
2300
x1506
1196F
K-th Path
brute force
,
constructive algorithms
,
shortest paths
,
sortings
2200
x2435
1184E2
Daleks' Invasion (medium)
dfs and similar
,
graphs
,
shortest paths
,
trees
2100
x901
1184B3
The Doctor Meets Vader (Hard)
flows
,
shortest paths
2700
x166
1184B2
The Doctor Meets Vader (Medium)
flows
,
graph matchings
,
graphs
,
shortest paths
,
sortings
2200
x566
1183E
Subsequences (easy version)
dp
,
graphs
,
implementation
,
shortest paths
2000
x4527
1176E
Cover it!
dfs and similar
,
dsu
,
graphs
,
shortest paths
,
trees
1700
x10472
1163F
Indecisive Taxi Fee
data structures
,
graphs
,
shortest paths
3000
x823
1140G
Double Tree
data structures
,
divide and conquer
,
shortest paths
,
trees
2700
x462
1106D
Lunar New Year and a Wander
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1500
x13960
1105D
Kilani and the Game
dfs and similar
,
graphs
,
implementation
,
shortest paths
1900
x3994
1081D
Maximum Distance
dsu
,
graphs
,
shortest paths
,
sortings
1800
x3898
1076D
Edge Deletion
graphs
,
greedy
,
shortest paths
1800
x4911
1070A
Find a Number
dp
,
graphs
,
number theory
,
shortest paths
2200
x2262
1067B
Multihedgehog
dfs and similar
,
graphs
,
shortest paths
1800
x2560
1065D
Three Pieces
dfs and similar
,
dp
,
shortest paths
2200
x1272
1063B
Labyrinth
graphs
,
shortest paths
1800
x7084
1051F
The Shortest Statement
graphs
,
shortest paths
,
trees
2400
x2682
1043F
Make It One
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
,
shortest paths
2500
x2190
1037D
Valid BFS?
dfs and similar
,
graphs
,
shortest paths
,
trees
1700
x13890
1005F
Berland and the Shortest Paths
brute force
,
dfs and similar
,
graphs
,
shortest paths
2100
x1617
1004E
Sonya and Ice Cream
binary search
,
data structures
,
dp
,
greedy
,
shortest paths
,
trees
2400
x1011
986F
Oppa Funcan Style Remastered
graphs
,
math
,
number theory
,
shortest paths
3300
x565
986A
Fair
graphs
,
greedy
,
number theory
,
shortest paths
1600
x6538
983C
Elevator
dp
,
graphs
,
shortest paths
2400
x801
954D
Fight Against Traffic
dfs and similar
,
graphs
,
shortest paths
1600
x6314
938D
Buy a Ticket
data structures
,
graphs
,
shortest paths
2000
x5207
936E
Iqea
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
shortest paths
,
trees
3400
x182
919F
A Game With Numbers
games
,
graphs
,
shortest paths
2600
x325
916C
Jamie and Interesting Graph
constructive algorithms
,
graphs
,
shortest paths
1600
x4998
913E
Logical Expression
bitmasks
,
dp
,
shortest paths
2400
x744
912D
Fishes
data structures
,
graphs
,
greedy
,
probabilities
,
shortest paths
2100
x1956
877D
Olya and Energy Drinks
data structures
,
dfs and similar
,
graphs
,
shortest paths
2100
x3954
852D
Exploration plan
binary search
,
flows
,
graph matchings
,
shortest paths
2100
x955
843D
Dynamic Shortest Path
graphs
,
shortest paths
3400
x757
827F
Dirty Arkady's Kitchen
data structures
,
dp
,
graphs
,
shortest paths
3200
x385
821D
Okabe and City
dfs and similar
,
graphs
,
shortest paths
2200
x1347
814E
An unavoidable detour for home
combinatorics
,
dp
,
graphs
,
shortest paths
2600
x640
796D
Police Stations
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
2100
x5143
793D
Presents in Bankopolis
dp
,
graphs
,
shortest paths
2100
x1576
793B
Igor and his way to work
dfs and similar
,
graphs
,
implementation
,
shortest paths
1600
x4344
788C
The Great Mixing
dfs and similar
,
graphs
,
shortest paths
2300
x2014
786B
Legacy
data structures
,
graphs
,
shortest paths
2300
x5469
780D
Innokenty and a Football League
2-sat
,
graphs
,
greedy
,
implementation
,
shortest paths
,
strings
1900
x2840
773D
Perishable Roads
dp
,
graphs
,
shortest paths
2700
x565
769C
Cycle In Maze
*special problem
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1700
x2116
763D
Timofey and a flat tree
data structures
,
graphs
,
hashing
,
shortest paths
,
trees
2900
x514
757F
Team Rocket Rises Again
data structures
,
graphs
,
shortest paths
2800
x1066
755E
PolandBall and White-Red graph
constructive algorithms
,
graphs
,
shortest paths
2400
x813
715B
Complete The Graph
binary search
,
constructive algorithms
,
graphs
,
shortest paths
2300
x2660
689B
Mike and Shortcuts
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x5610
677D
Vanya and Treasure
data structures
,
dp
,
graphs
,
shortest paths
2300
x1530
676D
Theseus and labyrinth
graphs
,
implementation
,
shortest paths
2000
x1829
666B
World Tour
graphs
,
shortest paths
2000
x2073
648E
Собери число
graphs
,
shortest paths
2300
x84
605E
Intergalaxy Trips
probabilities
,
shortest paths
2700
x1319
601A
The Two Routes
graphs
,
shortest paths
1600
x11464
598D
Igor In the Museum
dfs and similar
,
graphs
,
shortest paths
1700
x10553
590C
Three States
dfs and similar
,
graphs
,
shortest paths
2200
x2641
585B
Phillip and Trains
dfs and similar
,
graphs
,
shortest paths
1700
x3487
575G
Run for beer
dfs and similar
,
shortest paths
2200
x867
567E
President and Roads
dfs and similar
,
graphs
,
hashing
,
shortest paths
2200
x1645
558C
Amr and Chemistry
brute force
,
graphs
,
greedy
,
math
,
shortest paths
1900
x3935
545E
Paths and Trees
graphs
,
greedy
,
shortest paths
2000
x4400
543B
Destroying Roads
constructive algorithms
,
graphs
,
shortest paths
2100
x3835
542E
Playing on Graph
graphs
,
shortest paths
2600
x809
525D
Arthur and Walls
constructive algorithms
,
data structures
,
graphs
,
greedy
,
shortest paths
2400
x1638
520B
Two Buttons
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
,
shortest paths
1400
x48115
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