Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round (Div. 2)
3 days
→ Filter Problems
Difficulty:
—
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
Add tag
Main
acmsguru
|
Problems
Submit
Status
Standings
Custom test
Problems
#
Name
1648F
Two Avenues
data structures
,
dfs and similar
,
graphs
3500
x60
1446E
Long Recovery
constructive algorithms
,
dfs and similar
3500
x66
1621H
Trains and Airplanes
dfs and similar
,
graphs
,
shortest paths
,
trees
3500
x100
1444E
Finding the Vertex
brute force
,
dfs and similar
,
dp
,
interactive
,
trees
3500
x106
1608G
Alphabetic Tree
binary search
,
data structures
,
dfs and similar
,
hashing
,
string suffix structures
,
strings
,
trees
3500
x114
750H
New Year and Snowy Grid
dfs and similar
,
dsu
,
graphs
,
interactive
3500
x156
1616G
Just Add an Edge
dfs and similar
,
dp
,
graphs
3500
x193
1089H
Harder Satisfiability
2-sat
,
dfs and similar
,
graphs
3400
x92
786D
Rap God
data structures
,
dfs and similar
,
hashing
,
strings
,
trees
3400
x106
1552I
Organizing a Music Festival
dfs and similar
,
math
3400
x111
804F
Fake bullions
combinatorics
,
dfs and similar
,
dp
,
graphs
,
number theory
3400
x124
1601F
Two Sorts
binary search
,
dfs and similar
,
math
,
meet-in-the-middle
3400
x140
936E
Iqea
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
shortest paths
,
trees
3400
x164
1827E
Bus Routes
binary search
,
constructive algorithms
,
dfs and similar
,
greedy
,
trees
3400
x166
627F
Island Puzzle
dfs and similar
,
dsu
,
graphs
,
trees
3400
x194
1684H
Hard Cut
constructive algorithms
,
dfs and similar
,
divide and conquer
,
math
3400
x201
855G
Harry Vs Voldemort
dfs and similar
,
dp
,
graphs
,
trees
3300
x171
1254E
Send Tree to Charlie
combinatorics
,
dfs and similar
,
dsu
,
trees
3300
x226
639F
Bear and Chemistry
data structures
,
dfs and similar
,
graphs
,
trees
3300
x339
1307F
Cow and Vacation
dfs and similar
,
dsu
,
trees
3300
x407
1799H
Tree Cutting
bitmasks
,
dfs and similar
,
dp
3200
x173
1712F
Triameter
binary search
,
data structures
,
dfs and similar
,
trees
3200
x220
1519F
Chests and Keys
bitmasks
,
brute force
,
dfs and similar
,
dp
,
flows
3200
x261
1396E
Distance Matching
constructive algorithms
,
dfs and similar
,
trees
3200
x270
1648E
Air Reform
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
graphs
,
implementation
,
trees
3200
x288
650E
Clockwork Bomb
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
3200
x471
538H
Summer Dichotomy
2-sat
,
data structures
,
dfs and similar
,
greedy
3200
x503
487E
Tourists
data structures
,
dfs and similar
,
graphs
,
trees
3200
x1457
1578J
Just Kingdom
brute force
,
data structures
,
dfs and similar
3100
x127
891D
Sloth
dfs and similar
,
dp
,
graph matchings
,
trees
3100
x150
1610H
Squid Game
data structures
,
dfs and similar
,
greedy
,
trees
3100
x227
1508E
Tree Calendar
brute force
,
constructive algorithms
,
data structures
,
dfs and similar
,
sortings
,
trees
3100
x296
176E
Archaeology
data structures
,
dfs and similar
,
trees
3100
x747
521E
Cycling City
dfs and similar
,
graphs
3100
x756
251E
Tree and Table
dfs and similar
,
dp
,
implementation
,
trees
3000
x99
1236F
Alice and the Cactus
dfs and similar
,
graphs
,
math
,
probabilities
3000
x125
1659F
Tree and Permutation Game
dfs and similar
,
games
,
graphs
,
trees
3000
x152
1797F
Li Hua and Path
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
trees
3000
x185
1569F
Palindromic Hamiltonian Path
brute force
,
dfs and similar
,
dp
,
graphs
,
hashing
3000
x190
1763F
Edge Queries
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
trees
3000
x274
533A
Berland Miners
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
3000
x292
1178G
The Awesomest Vertex
data structures
,
dfs and similar
3000
x307
1558E
Down Below
binary search
,
dfs and similar
,
graphs
,
greedy
,
meet-in-the-middle
,
shortest paths
3000
x360
1299D
Around the World
bitmasks
,
combinatorics
,
dfs and similar
,
dp
,
graphs
,
graphs
,
math
,
trees
3000
x366
1381D
The Majestic Brown Tree Snake
dfs and similar
,
dp
,
greedy
,
trees
,
two pointers
3000
x377
1610F
Mashtali: a Space Oddysey
constructive algorithms
,
dfs and similar
,
graphs
3000
x399
1552G
A Serious Referee
bitmasks
,
brute force
,
dfs and similar
,
sortings
3000
x401
1534F2
Falling Sand (Hard Version)
dfs and similar
,
dp
,
graphs
,
greedy
3000
x413
1442E
Black, White and Grey Tree
binary search
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
3000
x434
1707D
Partial Virtual Trees
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
3000
x457
1361E
James and the Chase
dfs and similar
,
graphs
,
probabilities
,
trees
3000
x469
1320E
Treeland and Viruses
data structures
,
dfs and similar
,
dp
,
shortest paths
,
trees
3000
x541
566C
Logistical Questions
dfs and similar
,
divide and conquer
,
trees
3000
x550
504E
Misha and LCP on Tree
binary search
,
dfs and similar
,
hashing
,
string suffix structures
,
trees
3000
x711
65E
Harry Potter and Moving Staircases
dfs and similar
,
implementation
2900
x70
1218H
Function Composition
dfs and similar
2900
x95
1510C
Cactus Not Enough
dfs and similar
,
graph matchings
,
graphs
2900
x170
478E
Wavy numbers
brute force
,
dfs and similar
,
meet-in-the-middle
,
sortings
2900
x181
793E
Problem of offices
constructive algorithms
,
dfs and similar
,
dp
,
trees
2900
x216
217D
Bitonix' Patrol
bitmasks
,
brute force
,
combinatorics
,
dfs and similar
,
math
2900
x230
679D
Bear and Chase
brute force
,
dfs and similar
,
graphs
,
implementation
,
math
,
probabilities
2900
x280
687E
TOF
dfs and similar
,
graphs
2900
x293
1266F
Almost Same Distance
dfs and similar
,
graphs
2900
x299
1654G
Snowy Mountain
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
2900
x300
1494F
Delete The Edges
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
2900
x301
1392G
Omkar and Pies
bitmasks
,
dfs and similar
,
dp
,
math
,
shortest paths
2900
x399
1062F
Upgrading Cities
dfs and similar
,
graphs
2900
x402
167E
Wizards and Bets
dfs and similar
,
graphs
,
math
,
matrices
2900
x459
1667D
Edge Elimination
constructive algorithms
,
dfs and similar
,
dp
,
trees
2900
x477
343E
Pumping Stations
brute force
,
dfs and similar
,
divide and conquer
,
flows
,
graphs
,
greedy
,
trees
2900
x560
19E
Fairy
dfs and similar
,
divide and conquer
,
dsu
2900
x1346
741D
Arpa’s letter-marked tree and Mehrdad’s Dokhtar-kosh paths
data structures
,
dfs and similar
,
trees
2900
x2015
290F
Greedy Petya
*special problem
,
dfs and similar
,
graphs
,
greedy
2800
x104
869D
The Overdosing Ubiquity
brute force
,
dfs and similar
,
graphs
2800
x198
842E
Nikita and game
binary search
,
dfs and similar
,
divide and conquer
,
graphs
,
trees
2800
x276
240E
Road Repairs
dfs and similar
,
graphs
,
greedy
2800
x301
1721F
Matching Reduction
brute force
,
constructive algorithms
,
dfs and similar
,
flows
,
graph matchings
,
graphs
,
interactive
2800
x302
1389G
Directing Edges
dfs and similar
,
dp
,
graphs
,
trees
2800
x305
1214H
Tiles Placement
constructive algorithms
,
dfs and similar
,
trees
2800
x350
348E
Pilgrims
dfs and similar
,
dp
,
trees
2800
x355
1685D1
Permutation Weight (Easy Version)
constructive algorithms
,
dfs and similar
,
dsu
2800
x371
1827D
Two Centroids
data structures
,
dfs and similar
,
greedy
,
trees
2800
x377
1749F
Distance to the Path
data structures
,
dfs and similar
,
trees
2800
x398
1477D
Nezzar and Hidden Permutations
constructive algorithms
,
dfs and similar
,
graphs
2800
x405
1419F
Rain of Fire
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
2800
x428
51F
Caterpillar
dfs and similar
,
dp
,
graphs
,
trees
2800
x447
1033E
Hidden Bipartite Graph
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
interactive
2800
x471
1625E2
Cats on the Upgrade (hard version)
binary search
,
data structures
,
dfs and similar
,
graphs
,
trees
2800
x477
633G
Yash And Trees
bitmasks
,
data structures
,
dfs and similar
,
math
,
number theory
2800
x596
325E
The Red Button
combinatorics
,
dfs and similar
,
dsu
,
graphs
,
greedy
2800
x630
1400F
x-prime Substrings
brute force
,
dfs and similar
,
dp
,
string suffix structures
,
strings
2800
x646
1672F2
Checker for Array Shuffling
constructive algorithms
,
dfs and similar
,
graphs
2800
x660
1404D
Game of Pairs
constructive algorithms
,
dfs and similar
,
interactive
,
math
,
number theory
2800
x848
516D
Drazil and Morning Exercise
dfs and similar
,
dp
,
dsu
,
trees
,
two pointers
2800
x1081
163E
e-Government
data structures
,
dfs and similar
,
dp
,
strings
,
trees
2800
x1180
1375G
Tree Modification
brute force
,
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
trees
2800
x1416
555E
Case of Computer Network
dfs and similar
,
graphs
,
trees
2800
x1771
613D
Kingdom and its Cities
dfs and similar
,
divide and conquer
,
dp
,
graphs
,
sortings
,
trees
2800
x2079
982F
The Meeting Place Cannot Be Changed
dfs and similar
,
graphs
2700
x167
42E
Baldman and the military
dfs and similar
,
graphs
,
trees
2700
x172
←
1
2
3
...
7
8
→
User lists
Name