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Before contest
Codeforces Round 941 (Div. 1)
2 days
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Before contest
Codeforces Round 941 (Div. 2)
2 days
Register now »
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shortest paths
combine-tags-by-or
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2-sat
binary search
bitmasks
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chinese remainder theorem
combinatorics
constructive algorithms
data structures
dfs and similar
divide and conquer
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expression parsing
fft
flows
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graph matchings
graphs
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Problems
#
Name
1621H
Trains and Airplanes
dfs and similar
,
graphs
,
shortest paths
,
trees
3500
x161
1580E
Railway Construction
brute force
,
constructive algorithms
,
data structures
,
graphs
,
shortest paths
3400
x64
936E
Iqea
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
shortest paths
,
trees
3400
x182
843D
Dynamic Shortest Path
graphs
,
shortest paths
3400
x750
986F
Oppa Funcan Style Remastered
graphs
,
math
,
number theory
,
shortest paths
3300
x564
1859F
Teleportation in Byteland
data structures
,
dfs and similar
,
divide and conquer
,
graphs
,
shortest paths
,
trees
3200
x364
827F
Dirty Arkady's Kitchen
data structures
,
dp
,
graphs
,
shortest paths
3200
x383
1250I
Show Must Go On
binary search
,
brute force
,
greedy
,
shortest paths
3100
x126
317E
Princess and Her Shadow
constructive algorithms
,
shortest paths
3100
x151
1566G
Four Vertices
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
3100
x326
1307G
Cow and Exercise
flows
,
graphs
,
shortest paths
3100
x473
175F
Gnomes of Might and Magic
data structures
,
graphs
,
implementation
,
shortest paths
3000
x64
1218G
Alpha planetary system
constructive algorithms
,
graphs
,
shortest paths
3000
x87
1201E2
Knightmare (hard)
graphs
,
interactive
,
shortest paths
3000
x140
57E
Chess
math
,
shortest paths
3000
x249
1779G
The Game of the Century
constructive algorithms
,
graphs
,
shortest paths
3000
x300
1615H
Reindeer Games
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
flows
,
graphs
,
shortest paths
3000
x307
461E
Appleman and a Game
binary search
,
shortest paths
,
strings
3000
x355
1558E
Down Below
binary search
,
dfs and similar
,
graphs
,
greedy
,
meet-in-the-middle
,
shortest paths
3000
x433
1320E
Treeland and Viruses
data structures
,
dfs and similar
,
dp
,
shortest paths
,
trees
3000
x617
1163F
Indecisive Taxi Fee
data structures
,
graphs
,
shortest paths
3000
x817
464E
The Classic Problem
data structures
,
graphs
,
shortest paths
3000
x1295
1387C
Viruses
*special problem
,
dp
,
shortest paths
,
string suffix structures
2900
x122
1201E1
Knightmare (easy)
graphs
,
interactive
,
shortest paths
2900
x125
1726F
Late For Work (submissions are not allowed)
data structures
,
greedy
,
schedules
,
shortest paths
2900
x131
1654G
Snowy Mountain
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
2900
x353
1487F
Ones
dp
,
greedy
,
shortest paths
2900
x359
1392G
Omkar and Pies
bitmasks
,
dfs and similar
,
dp
,
math
,
shortest paths
2900
x441
763D
Timofey and a flat tree
data structures
,
graphs
,
hashing
,
shortest paths
,
trees
2900
x514
1765I
Infinite Chess
implementation
,
shortest paths
2800
x181
1578A
Anti-Tetris
constructive algorithms
,
graphs
,
shortest paths
2800
x327
1612F
Armor and Weapons
brute force
,
dp
,
greedy
,
shortest paths
2800
x560
360E
Levko and Game
graphs
,
greedy
,
shortest paths
2800
x674
1648D
Serious Business
data structures
,
divide and conquer
,
dp
,
implementation
,
shortest paths
2800
x785
79D
Password
bitmasks
,
dp
,
shortest paths
2800
x937
757F
Team Rocket Rises Again
data structures
,
graphs
,
shortest paths
2800
x1065
1184B3
The Doctor Meets Vader (Hard)
flows
,
shortest paths
2700
x166
1599G
Shortest path
brute force
,
geometry
,
math
,
shortest paths
2700
x357
1140G
Double Tree
data structures
,
divide and conquer
,
shortest paths
,
trees
2700
x449
1627F
Not Splitting
geometry
,
graphs
,
greedy
,
implementation
,
shortest paths
2700
x551
773D
Perishable Roads
dp
,
graphs
,
shortest paths
2700
x561
1550F
Jumping Around
binary search
,
data structures
,
divide and conquer
,
dp
,
dsu
,
graphs
,
shortest paths
2700
x627
1617E
Christmas Chocolates
dfs and similar
,
dp
,
games
,
graphs
,
implementation
,
math
,
number theory
,
shortest paths
,
trees
2700
x827
1804F
Approximate Diameter
binary search
,
divide and conquer
,
graphs
,
shortest paths
2700
x848
1632E2
Distance Tree (hard version)
binary search
,
dfs and similar
,
shortest paths
,
trees
2700
x925
1450E
Capitalism
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2700
x1014
1370F2
The Hidden Pair (Hard Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2700
x1231
605E
Intergalaxy Trips
probabilities
,
shortest paths
2700
x1315
232C
Doe Graphs
constructive algorithms
,
divide and conquer
,
dp
,
graphs
,
shortest paths
2600
x279
919F
A Game With Numbers
games
,
graphs
,
shortest paths
2600
x321
325C
Monsters and Diamonds
dfs and similar
,
graphs
,
shortest paths
2600
x331
238E
Meeting Her
dp
,
graphs
,
shortest paths
2600
x337
375C
Circling Round Treasures
bitmasks
,
shortest paths
2600
x470
37E
Trial for Chief
graphs
,
greedy
,
shortest paths
2600
x556
814E
An unavoidable detour for home
combinatorics
,
dp
,
graphs
,
shortest paths
2600
x637
346D
Robot Control
dp
,
graphs
,
shortest paths
2600
x681
1681E
Labyrinth Adventures
data structures
,
dp
,
matrices
,
shortest paths
2600
x697
1898F
Vova Escapes the Matrix
brute force
,
dfs and similar
,
divide and conquer
,
shortest paths
2600
x731
542E
Playing on Graph
graphs
,
shortest paths
2600
x806
196E
Opening Portals
dsu
,
graphs
,
shortest paths
2600
x827
241E
Flights
graphs
,
shortest paths
2600
x989
1301F
Super Jaber
dfs and similar
,
graphs
,
implementation
,
shortest paths
2600
x1036
1209F
Koala and Notebook
data structures
,
dfs and similar
,
graphs
,
shortest paths
,
strings
,
trees
2600
x1065
1495D
BFS Trees
combinatorics
,
dfs and similar
,
graphs
,
math
,
shortest paths
,
trees
2600
x1190
1325E
Ehab's REAL Number Theory Problem
brute force
,
dfs and similar
,
graphs
,
number theory
,
shortest paths
2600
x1799
311C
Fetch the Treasure
brute force
,
data structures
,
graphs
,
shortest paths
2500
x475
1776J
Italian Data Centers
graphs
,
shortest paths
2500
x605
1920F1
Smooth Sailing (Easy Version)
binary search
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
shortest paths
2500
x867
1842F
Tenzing and Tree
dfs and similar
,
greedy
,
shortest paths
,
sortings
,
trees
2500
x1234
1528D
It's a bird! No, it's a plane! No, it's AaParsa!
constructive algorithms
,
graphs
,
shortest paths
2500
x1381
416E
President's Path
dp
,
graphs
,
shortest paths
2500
x1387
1253F
Cheap Robot
binary search
,
dsu
,
graphs
,
shortest paths
,
trees
2500
x1574
1407E
Egor in the Republic of Dagestan
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
2500
x1599
1043F
Make It One
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
,
shortest paths
2500
x2169
75E
Ship's Shortest Path
geometry
,
shortest paths
2400
x268
97C
Winning Strategy
binary search
,
graphs
,
math
,
shortest paths
2400
x296
83C
Track
graphs
,
greedy
,
shortest paths
2400
x401
266D
BerDonalds
graphs
,
math
,
shortest paths
2400
x706
913E
Logical Expression
bitmasks
,
dp
,
shortest paths
2400
x743
983C
Elevator
dp
,
graphs
,
shortest paths
2400
x801
755E
PolandBall and White-Red graph
constructive algorithms
,
graphs
,
shortest paths
2400
x807
29E
Quarrel
graphs
,
shortest paths
2400
x850
1004E
Sonya and Ice Cream
binary search
,
data structures
,
dp
,
greedy
,
shortest paths
,
trees
2400
x1007
1936C
Pokémon Arena
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
2400
x1044
1874B
Jellyfish and Math
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x1051
1632E1
Distance Tree (easy version)
binary search
,
data structures
,
dfs and similar
,
graphs
,
shortest paths
,
trees
2400
x1107
1738F
Connectivity Addicts
constructive algorithms
,
dsu
,
graphs
,
greedy
,
interactive
,
shortest paths
,
trees
2400
x1145
1860E
Fast Travel Text Editor
data structures
,
dfs and similar
,
graphs
,
shortest paths
2400
x1291
1370F1
The Hidden Pair (Easy Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2400
x1353
1482F
Useful Edges
graphs
,
shortest paths
2400
x1465
1442C
Graph Transpositions
dfs and similar
,
graphs
,
greedy
,
shortest paths
2400
x1577
1715E
Long Way Home
data structures
,
divide and conquer
,
dp
,
geometry
,
graphs
,
greedy
,
shortest paths
2400
x1594
1749E
Cactus Wall
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2400
x1596
525D
Arthur and Walls
constructive algorithms
,
data structures
,
graphs
,
greedy
,
shortest paths
2400
x1631
1753D
The Beach
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2400
x1658
1340C
Nastya and Unexpected Guest
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x2018
1051F
The Shortest Statement
graphs
,
shortest paths
,
trees
2400
x2652
1473E
Minimum Path
graphs
,
shortest paths
2400
x3292
648E
Собери число
graphs
,
shortest paths
2300
x83
254D
Rats
brute force
,
dfs and similar
,
graphs
,
implementation
,
shortest paths
2300
x497
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