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Codeforces Round 941 (Div. 1)
3 days
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Before contest
Codeforces Round 941 (Div. 2)
3 days
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shortest paths
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
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dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
hashing
implementation
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probabilities
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Problems
#
Name
173B
Chamber of Secrets
dfs and similar
,
shortest paths
1800
x2834
1815B
Sum Graph
brute force
,
constructive algorithms
,
graphs
,
implementation
,
interactive
,
shortest paths
,
trees
2000
x2825
400D
Dima and Bacteria
dsu
,
graphs
,
shortest paths
2000
x2792
1486E
Paired Payment
binary search
,
brute force
,
constructive algorithms
,
dp
,
flows
,
graphs
,
shortest paths
2200
x2783
95C
Volleyball
shortest paths
1900
x2665
715B
Complete The Graph
binary search
,
constructive algorithms
,
graphs
,
shortest paths
2300
x2656
1887B
Time Travel
binary search
,
graphs
,
shortest paths
1900
x2655
1051F
The Shortest Statement
graphs
,
shortest paths
,
trees
2400
x2652
590C
Three States
dfs and similar
,
graphs
,
shortest paths
2200
x2603
507E
Breaking Good
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2589
1422D
Returning Home
graphs
,
shortest paths
,
sortings
2300
x2585
253C
Text Editor
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x2516
1067B
Multihedgehog
dfs and similar
,
graphs
,
shortest paths
1800
x2505
1693C
Keshi in Search of AmShZ
graphs
,
greedy
,
shortest paths
2300
x2425
1536E
Omkar and Forest
combinatorics
,
graphs
,
math
,
shortest paths
2300
x2336
1650G
Counting Shortcuts
data structures
,
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2327
1196F
K-th Path
brute force
,
constructive algorithms
,
shortest paths
,
sortings
2200
x2297
1070A
Find a Number
dp
,
graphs
,
number theory
,
shortest paths
2200
x2259
1627E
Not Escaping
data structures
,
dp
,
implementation
,
shortest paths
,
two pointers
2200
x2217
1870E
Another MEX Problem
bitmasks
,
brute force
,
dp
,
shortest paths
2300
x2190
1043F
Make It One
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
,
shortest paths
2500
x2168
1933F
Turtle Mission: Robot and the Earthquake
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2147
301B
Yaroslav and Time
binary search
,
graphs
,
shortest paths
2100
x2104
769C
Cycle In Maze
*special problem
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1700
x2096
666B
World Tour
graphs
,
shortest paths
2000
x2060
1801D
The way home
binary search
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x2028
1340C
Nastya and Unexpected Guest
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x2018
788C
The Great Mixing
dfs and similar
,
graphs
,
shortest paths
2300
x2001
912D
Fishes
data structures
,
graphs
,
greedy
,
probabilities
,
shortest paths
2100
x1933
187B
AlgoRace
dp
,
shortest paths
1800
x1920
1534E
Lost Array
graphs
,
greedy
,
interactive
,
shortest paths
2300
x1845
676D
Theseus and labyrinth
graphs
,
implementation
,
shortest paths
2000
x1825
1737D
Ela and the Wiring Wizard
brute force
,
dp
,
graphs
,
greedy
,
implementation
,
shortest paths
2200
x1806
1325E
Ehab's REAL Number Theory Problem
brute force
,
dfs and similar
,
graphs
,
number theory
,
shortest paths
2600
x1798
208C
Police Station
dp
,
graphs
,
shortest paths
1900
x1777
1505E
Cakewalk
*special problem
,
greedy
,
implementation
,
shortest paths
1800
x1719
1753D
The Beach
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2400
x1658
295C
Greg and Friends
combinatorics
,
dp
,
graphs
,
shortest paths
2100
x1654
525D
Arthur and Walls
constructive algorithms
,
data structures
,
graphs
,
greedy
,
shortest paths
2400
x1631
1005F
Berland and the Shortest Paths
brute force
,
dfs and similar
,
graphs
,
shortest paths
2100
x1604
567E
President and Roads
dfs and similar
,
graphs
,
hashing
,
shortest paths
2200
x1601
1407E
Egor in the Republic of Dagestan
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
2500
x1599
1749E
Cactus Wall
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2400
x1596
1715E
Long Way Home
data structures
,
divide and conquer
,
dp
,
geometry
,
graphs
,
greedy
,
shortest paths
2400
x1593
1442C
Graph Transpositions
dfs and similar
,
graphs
,
greedy
,
shortest paths
2400
x1577
1253F
Cheap Robot
binary search
,
dsu
,
graphs
,
shortest paths
,
trees
2500
x1574
793D
Presents in Bankopolis
dp
,
graphs
,
shortest paths
2100
x1572
677D
Vanya and Treasure
data structures
,
dp
,
graphs
,
shortest paths
2300
x1520
1482F
Useful Edges
graphs
,
shortest paths
2400
x1465
1197E
Culture Code
binary search
,
combinatorics
,
data structures
,
dp
,
shortest paths
,
sortings
2300
x1449
1227E
Arson In Berland Forest
binary search
,
graphs
,
graphs
,
shortest paths
2200
x1434
1741G
Kirill and Company
bitmasks
,
brute force
,
dfs and similar
,
dp
,
flows
,
graphs
,
shortest paths
2200
x1407
416E
President's Path
dp
,
graphs
,
shortest paths
2500
x1387
1528D
It's a bird! No, it's a plane! No, it's AaParsa!
constructive algorithms
,
graphs
,
shortest paths
2500
x1381
1370F1
The Hidden Pair (Easy Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2400
x1352
821D
Okabe and City
dfs and similar
,
graphs
,
shortest paths
2200
x1339
605E
Intergalaxy Trips
probabilities
,
shortest paths
2700
x1315
464E
The Classic Problem
data structures
,
graphs
,
shortest paths
3000
x1294
1860E
Fast Travel Text Editor
data structures
,
dfs and similar
,
graphs
,
shortest paths
2400
x1291
1666J
Job Lookup
constructive algorithms
,
dp
,
shortest paths
,
trees
2100
x1291
366D
Dima and Trap Graph
binary search
,
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
two pointers
2000
x1270
1065D
Three Pieces
dfs and similar
,
dp
,
shortest paths
2200
x1268
1842F
Tenzing and Tree
dfs and similar
,
greedy
,
shortest paths
,
sortings
,
trees
2500
x1234
1370F2
The Hidden Pair (Hard Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2700
x1231
1495D
BFS Trees
combinatorics
,
dfs and similar
,
graphs
,
math
,
shortest paths
,
trees
2600
x1190
1738F
Connectivity Addicts
constructive algorithms
,
dsu
,
graphs
,
greedy
,
interactive
,
shortest paths
,
trees
2400
x1145
33D
Knights
geometry
,
graphs
,
shortest paths
,
sortings
2000
x1128
1632E1
Distance Tree (easy version)
binary search
,
data structures
,
dfs and similar
,
graphs
,
shortest paths
,
trees
2400
x1107
1245E
Hyakugoku and Ladders
dp
,
probabilities
,
shortest paths
2300
x1107
369D
Valera and Fools
dfs and similar
,
dp
,
graphs
,
shortest paths
2200
x1085
1209F
Koala and Notebook
data structures
,
dfs and similar
,
graphs
,
shortest paths
,
strings
,
trees
2600
x1065
757F
Team Rocket Rises Again
data structures
,
graphs
,
shortest paths
2800
x1065
1874B
Jellyfish and Math
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x1051
1936C
Pokémon Arena
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
2400
x1043
1790G
Tokens on Graph
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2300
x1041
1301F
Super Jaber
dfs and similar
,
graphs
,
implementation
,
shortest paths
2600
x1036
1450E
Capitalism
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2700
x1011
1004E
Sonya and Ice Cream
binary search
,
data structures
,
dp
,
greedy
,
shortest paths
,
trees
2400
x1007
241E
Flights
graphs
,
shortest paths
2600
x989
1662F
Antennas
data structures
,
dfs and similar
,
graphs
,
graphs
,
implementation
,
implementation
,
shortest paths
,
shortest paths
x955
852D
Exploration plan
binary search
,
flows
,
graph matchings
,
shortest paths
2100
x944
79D
Password
bitmasks
,
dp
,
shortest paths
2800
x936
1632E2
Distance Tree (hard version)
binary search
,
dfs and similar
,
shortest paths
,
trees
2700
x925
1955H
The Most Reckless Defense
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
flows
,
graph matchings
,
shortest paths
2300
x900
1184E2
Daleks' Invasion (medium)
dfs and similar
,
graphs
,
shortest paths
,
trees
2100
x895
1920F1
Smooth Sailing (Easy Version)
binary search
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
shortest paths
2500
x867
575G
Run for beer
dfs and similar
,
shortest paths
2200
x865
141D
Take-off Ramps
graphs
,
shortest paths
2300
x863
1932G
Moving Platforms
graphs
,
math
,
number theory
,
shortest paths
2300
x858
29E
Quarrel
graphs
,
shortest paths
2400
x850
1804F
Approximate Diameter
binary search
,
divide and conquer
,
graphs
,
shortest paths
2700
x848
1617E
Christmas Chocolates
dfs and similar
,
dp
,
games
,
graphs
,
implementation
,
math
,
number theory
,
shortest paths
,
trees
2700
x827
196E
Opening Portals
dsu
,
graphs
,
shortest paths
2600
x826
1163F
Indecisive Taxi Fee
data structures
,
graphs
,
shortest paths
3000
x817
755E
PolandBall and White-Red graph
constructive algorithms
,
graphs
,
shortest paths
2400
x807
542E
Playing on Graph
graphs
,
shortest paths
2600
x806
983C
Elevator
dp
,
graphs
,
shortest paths
2400
x801
362E
Petya and Pipes
flows
,
graphs
,
shortest paths
2300
x794
1648D
Serious Business
data structures
,
divide and conquer
,
dp
,
implementation
,
shortest paths
2800
x785
843D
Dynamic Shortest Path
graphs
,
shortest paths
3400
x750
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