Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round 937 (Div. 4)
01:51:32
Register now »
→ Filter Problems
Difficulty:
—
graphs
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
939A
Love Triangle
graphs
800
x23808
1549B
Gregor and the Pawn Game
dfs and similar
,
dp
,
flows
,
graph matchings
,
graphs
,
greedy
,
implementation
800
x23626
1944A
Destroying Bridges
graphs
,
greedy
,
math
800
x18616
755A
PolandBall and Hypothesis
brute force
,
graphs
,
math
,
number theory
800
x17401
1797A
Li Hua and Maze
constructive algorithms
,
flows
,
graphs
,
greedy
,
implementation
800
x16798
115A
Party
dfs and similar
,
graphs
,
trees
900
x32372
948A
Protect Sheep
brute force
,
dfs and similar
,
graphs
,
implementation
900
x13241
1055A
Metro
graphs
900
x10259
500A
New Year Transportation
dfs and similar
,
graphs
,
implementation
1000
x49591
1020B
Badge
brute force
,
dfs and similar
,
graphs
1000
x19938
1033A
King Escape
dfs and similar
,
graphs
,
implementation
1000
x12815
1472C
Long Jumps
dp
,
graphs
1100
x29484
1829E
The Lakes
dfs and similar
,
dsu
,
graphs
,
implementation
1100
x17785
1255B
Fridge Lockers
graphs
,
implementation
1100
x11602
370A
Rook, Bishop and King
graphs
,
math
,
shortest paths
1100
x9781
648C
Путь Робота
constructive algorithms
,
dfs and similar
,
graphs
1100
x804
217A
Ice Skating
brute force
,
dfs and similar
,
dsu
,
graphs
1200
x20040
1559C
Mocha and Hiking
constructive algorithms
,
graphs
1200
x19511
1327B
Princesses and Princes
brute force
,
graphs
,
greedy
1200
x18207
522A
Reposts
*special problem
,
dfs and similar
,
dp
,
graphs
,
trees
1200
x15562
1647B
Madoka and the Elegant Gift
brute force
,
constructive algorithms
,
graphs
,
implementation
1200
x14984
1428B
Belted Rooms
graphs
,
implementation
1200
x14120
129B
Students and Shoelaces
brute force
,
dfs and similar
,
graphs
,
implementation
1200
x11567
1581B
Diameter of Graph
constructive algorithms
,
graphs
,
greedy
,
math
1200
x10958
344B
Simple Molecules
brute force
,
graphs
,
math
1200
x8607
292B
Network Topology
graphs
,
implementation
1200
x7391
1510K
King's Task
brute force
,
graphs
,
implementation
1200
x5229
1360E
Polygon
dp
,
graphs
,
implementation
,
shortest paths
1300
x24231
893C
Rumor
dfs and similar
,
graphs
,
greedy
1300
x21293
1661B
Getting Zero
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1300
x16768
330B
Road Construction
constructive algorithms
,
graphs
1300
x16091
1829F
Forever Winter
dfs and similar
,
graphs
,
math
1300
x15821
862B
Mahmoud and Ehab and the bipartiteness
dfs and similar
,
graphs
,
trees
1300
x15487
1638C
Inversion Graph
data structures
,
dsu
,
graphs
,
math
1300
x14264
1741D
Masha and a Beautiful Tree
dfs and similar
,
divide and conquer
,
graphs
,
sortings
,
trees
1300
x14187
1676G
White-Black Balanced Subtrees
dfs and similar
,
dp
,
graphs
,
trees
1300
x13713
1711B
Party
brute force
,
graphs
1300
x13027
707B
Bakery
graphs
1300
x12704
1675D
Vertical Paths
graphs
,
implementation
,
trees
1300
x12416
1534C
Little Alawn's Puzzle
combinatorics
,
dp
,
dsu
,
graphs
,
math
1300
x12413
1948C
Arrow Path
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
1300
x12361
1726C
Jatayu's Balanced Bracket Sequence
data structures
,
dsu
,
graphs
,
greedy
1300
x11794
755C
PolandBall and Forest
dfs and similar
,
dsu
,
graphs
,
interactive
,
trees
1300
x11292
1065B
Vasya and Isolated Vertices
constructive algorithms
,
graphs
1300
x10701
899C
Dividing the numbers
constructive algorithms
,
graphs
,
math
1300
x8221
94B
Friends
graphs
,
implementation
,
math
1300
x4451
520B
Two Buttons
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
,
shortest paths
1400
x47242
1475C
Ball in Berland
combinatorics
,
graphs
,
math
1400
x19698
1167C
News Distribution
dfs and similar
,
dsu
,
graphs
1400
x16499
1548A
Web of Lies
brute force
,
graphs
,
greedy
1400
x15910
1579D
Productive Meeting
constructive algorithms
,
graphs
,
greedy
1400
x15092
1540A
Great Graphs
constructive algorithms
,
graphs
,
greedy
,
shortest paths
,
sortings
1400
x13604
437C
The Child and Toy
graphs
,
greedy
,
sortings
1400
x13417
1559D1
Mocha and Diana (Easy Version)
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
trees
1400
x13090
1830A
Copil Copac Draws Trees
dfs and similar
,
dp
,
graphs
,
trees
1400
x12131
1800E1
Unforgivable Curse (easy version)
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
strings
1400
x11938
505B
Mr. Kitayuta's Colorful Graph
dfs and similar
,
dp
,
dsu
,
graphs
1400
x11902
1893A
Anonymous Informant
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x10931
1735C
Phase Shift
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
strings
1400
x9445
1670C
Where is the Pizza?
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
,
math
1400
x9408
1761C
Set Construction
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
1400
x9059
1764C
Doremy's City Construction
graphs
,
greedy
1400
x8855
475B
Strongly Connected City
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x8159
107A
Dorm Water Supply
dfs and similar
,
graphs
1400
x4877
24A
Ring road
graphs
1400
x4702
417C
Football
constructive algorithms
,
graphs
,
implementation
1400
x4596
8B
Obsession with Robots
constructive algorithms
,
graphs
,
implementation
1400
x3986
802J
Send the Fool Further! (easy)
dfs and similar
,
graphs
,
trees
1400
x3969
580C
Kefa and Park
dfs and similar
,
graphs
,
trees
1500
x39137
977E
Cyclic Components
dfs and similar
,
dsu
,
graphs
1500
x18861
1418C
Mortal Kombat Tower
dp
,
graphs
,
greedy
,
shortest paths
1500
x17761
839C
Journey
dfs and similar
,
dp
,
graphs
,
probabilities
,
trees
1500
x15679
1552B
Running for Gold
combinatorics
,
graphs
,
greedy
,
sortings
1500
x14865
1391C
Cyclic Permutations
combinatorics
,
dp
,
graphs
,
math
1500
x14480
771A
Bear and Friendship Condition
dfs and similar
,
dsu
,
graphs
1500
x14474
1106D
Lunar New Year and a Wander
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1500
x13733
1487C
Minimum Ties
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
1500
x13598
687A
NP-Hard Problem
dfs and similar
,
graphs
1500
x13499
1263D
Secret Passwords
dfs and similar
,
dsu
,
graphs
1500
x13119
1800E2
Unforgivable Curse (hard version)
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
strings
1500
x11810
1139C
Edgy Trees
dfs and similar
,
dsu
,
graphs
,
math
,
trees
1500
x11722
982C
Cut 'em all!
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
1500
x10628
1169B
Pairs
graphs
,
implementation
1500
x9259
1851E
Nastya and Potions
dfs and similar
,
dp
,
graphs
,
sortings
1500
x9185
103B
Cthulhu
dfs and similar
,
dsu
,
graphs
1500
x8454
744A
Hongcow Builds A Nation
dfs and similar
,
graphs
1500
x7790
574B
Bear and Three Musketeers
brute force
,
dfs and similar
,
graphs
,
hashing
1500
x7551
320B
Ping-Pong (Easy Version)
dfs and similar
,
graphs
1500
x7040
930A
Peculiar apple-tree
dfs and similar
,
graphs
,
trees
1500
x6689
300B
Coach
brute force
,
dfs and similar
,
graphs
1500
x6032
402C
Searching for Graph
brute force
,
constructive algorithms
,
graphs
1500
x5641
1147A
Hide and Seek
graphs
1500
x4988
690C2
Brain Network (medium)
dfs and similar
,
graphs
,
trees
1500
x3535
114B
PFAST Inc.
bitmasks
,
brute force
,
graphs
1500
x3476
350B
Resort
graphs
1500
x3048
770C
Online Courses In BSU
*special problem
,
dfs and similar
,
graphs
,
implementation
1500
x2502
177C1
Party
dfs and similar
,
dsu
,
graphs
1500
x2407
177C2
Party
brute force
,
dfs and similar
,
dsu
,
graphs
1500
x2399
510C
Fox And Names
dfs and similar
,
graphs
,
sortings
1600
x14856
1437D
Minimal Height Tree
graphs
,
greedy
,
shortest paths
,
trees
1600
x12222
←
1
2
3
...
9
10
→
User lists
Name