Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Educational Codeforces Round 165 (Rated for Div. 2)
19:55:39
Register now »
→ Filter Problems
Difficulty:
—
binary search
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
1866L
Lihmuf Balling
binary search
,
brute force
,
math
2400
x651
1849F
XOR Partition
binary search
,
bitmasks
,
data structures
,
divide and conquer
,
greedy
,
trees
2700
x650
961F
k-substrings
binary search
,
hashing
,
string suffix structures
2700
x649
1521E
Nastia and a Beautiful Matrix
binary search
,
constructive algorithms
,
dp
,
greedy
2700
x648
571D
Campus
binary search
,
data structures
,
dsu
,
trees
3100
x647
1774F2
Magician and Pigs (Hard Version)
binary search
,
brute force
,
data structures
,
implementation
2700
x637
1236E
Alice and the Unfair Game
binary search
,
data structures
,
dp
,
dsu
2500
x634
1550F
Jumping Around
binary search
,
data structures
,
divide and conquer
,
dp
,
dsu
,
graphs
,
shortest paths
2700
x627
1019D
Large Triangle
binary search
,
geometry
,
sortings
2700
x624
796E
Exam Cheating
binary search
,
dp
2400
x621
1476F
Lanterns
binary search
,
data structures
,
dp
3000
x614
883C
Downloading B++
binary search
,
implementation
2300
x614
847J
Students Initiation
binary search
,
flows
,
graphs
2400
x614
1945G
Cook and Porridge
binary search
,
constructive algorithms
,
data structures
,
implementation
2500
x608
76F
Tourist
binary search
,
data structures
,
dp
2300
x601
131F
Present to Mom
binary search
,
two pointers
2000
x599
50D
Bombing
binary search
,
dp
,
probabilities
2100
x596
815D
Karen and Cards
binary search
,
combinatorics
,
data structures
,
geometry
2800
x595
993D
Compute Power
binary search
,
dp
,
greedy
2500
x592
1366F
Jog Around The Graph
binary search
,
dp
,
geometry
,
graphs
2700
x588
28D
Don't fear, DravDe is kind
binary search
,
data structures
,
dp
,
hashing
2400
x582
677E
Vanya and Balloons
binary search
,
brute force
,
dp
,
implementation
2300
x581
1514E
Baby Ehab's Hyper Apartment
binary search
,
graphs
,
interactive
,
sortings
,
two pointers
2700
x580
1033E
Hidden Bipartite Graph
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
interactive
2800
x578
845E
Fire in the City
binary search
,
data structures
2400
x578
1625E2
Cats on the Upgrade (hard version)
binary search
,
data structures
,
dfs and similar
,
graphs
,
trees
2800
x576
685C
Optimal Point
binary search
,
math
2900
x576
160E
Buses and People
binary search
,
data structures
,
sortings
2400
x576
177E1
Space Voyage
binary search
1700
x574
633E
Startup Funding
binary search
,
constructive algorithms
,
data structures
,
probabilities
,
two pointers
2400
x567
639E
Bear and Paradox
binary search
,
greedy
,
math
,
sortings
2800
x565
1379F1
Chess Strikes Back (easy version)
binary search
,
data structures
2700
x561
404E
Maze 1D
binary search
,
greedy
,
implementation
2200
x561
70C
Lucky Tickets
binary search
,
data structures
,
sortings
,
two pointers
2200
x561
1762F
Good Pairs
binary search
,
data structures
,
dp
2600
x558
1707E
Replace
binary search
,
data structures
3500
x557
1687D
Cute number
binary search
,
brute force
,
data structures
,
dsu
,
implementation
,
math
2900
x557
424D
Biathlon Track
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
2300
x554
1442E
Black, White and Grey Tree
binary search
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
3000
x551
1903F
Babysitting
2-sat
,
binary search
,
data structures
,
graphs
,
trees
2500
x550
1661F
Teleporters
binary search
,
greedy
2600
x549
1764G1
Doremy's Perfect DS Class (Easy Version)
binary search
,
interactive
2900
x544
1854D
Michael and Hotel
binary search
,
interactive
,
trees
3000
x522
85C
Petya and Tree
binary search
,
dfs and similar
,
probabilities
,
sortings
,
trees
2200
x521
253E
Printer
binary search
,
data structures
,
implementation
,
sortings
2200
x520
889E
Mod Mod Mod
binary search
,
dp
,
math
3000
x514
314D
Sereja and Straight Lines
binary search
,
data structures
,
geometry
,
sortings
,
two pointers
2500
x514
8D
Two Friends
binary search
,
geometry
2600
x509
989D
A Shade of Moonlight
binary search
,
geometry
,
math
,
sortings
,
two pointers
2500
x503
1764G2
Doremy's Perfect DS Class (Medium Version)
binary search
,
interactive
3000
x494
421D
Bug in Code
binary search
,
data structures
,
sortings
1900
x493
73B
Need For Brake
binary search
,
greedy
,
sortings
2000
x488
594B
Max and Bike
binary search
,
geometry
2500
x475
1419F
Rain of Fire
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
2800
x474
248D
Sweets for Everyone!
binary search
,
greedy
,
implementation
2300
x474
1710E
Two Arrays
binary search
,
games
,
graph matchings
2400
x465
1310C
Au Pont Rouge
binary search
,
dp
,
strings
2800
x464
1056F
Write The Contest
binary search
,
dp
,
math
2500
x464
1870F
Lazy Numbers
binary search
,
math
2900
x462
309A
Morning run
binary search
,
math
,
two pointers
2000
x458
611F
New Year and Cleaning
binary search
,
implementation
2500
x454
212D
Cutting a Fence
binary search
,
data structures
,
dsu
2500
x451
1575B
Building an Amusement Park
binary search
,
geometry
2300
x450
623C
Electric Charges
binary search
,
dp
2900
x448
232D
Fence
binary search
,
data structures
,
string suffix structures
2900
x441
1535F
String Distance
binary search
,
brute force
,
data structures
,
hashing
,
implementation
,
strings
3000
x437
1358F
Tasty Cookie
binary search
,
constructive algorithms
,
greedy
,
implementation
2700
x436
1558E
Down Below
binary search
,
dfs and similar
,
graphs
,
greedy
,
meet-in-the-middle
,
shortest paths
3000
x433
1034D
Intervals of Intervals
binary search
,
data structures
,
two pointers
3500
x431
1764G3
Doremy's Perfect DS Class (Hard Version)
binary search
,
interactive
3300
x428
832C
Strange Radiation
binary search
,
implementation
,
math
2500
x427
1608E
The Cells on the Paper
binary search
,
implementation
,
sortings
2800
x423
1372F
Omkar and Modes
binary search
,
divide and conquer
,
interactive
2700
x422
855F
Nagini
binary search
,
data structures
3100
x417
1728G
Illumination
binary search
,
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
two pointers
2700
x409
260E
Dividing Kingdom
binary search
,
brute force
,
data structures
2500
x408
1866K
Keen Tree Calculation
binary search
,
data structures
,
dp
,
geometry
,
graphs
,
implementation
,
trees
2500
x405
1007C
Guess two numbers
binary search
,
interactive
3000
x405
1936D
Bitwise Paradox
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
3100
x404
198E
Gripping Story
binary search
,
data structures
,
sortings
2400
x400
1488C
Two Policemen
*special problem
,
binary search
,
brute force
,
math
1900
x397
842E
Nikita and game
binary search
,
dfs and similar
,
divide and conquer
,
graphs
,
trees
2800
x396
1920F2
Smooth Sailing (Hard Version)
binary search
,
data structures
,
dsu
,
geometry
,
graphs
,
trees
3000
x394
177E2
Space Voyage
binary search
1900
x394
201E
Thoroughly Bureaucratic Organization
binary search
,
combinatorics
2600
x391
1935F
Andrey's Tree
binary search
,
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
implementation
,
trees
2800
x384
1129E
Legendary Tree
binary search
,
interactive
,
trees
3100
x369
1844F2
Min Cost Permutation (Hard Version)
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
,
sortings
2800
x368
1202F
You Are Given Some Letters...
binary search
,
implementation
,
math
2700
x368
198C
Delivering Carcinogen
binary search
,
geometry
2400
x368
1651F
Tower Defense
binary search
,
brute force
,
data structures
3000
x362
461E
Appleman and a Game
binary search
,
shortest paths
,
strings
3000
x361
1827E
Bus Routes
binary search
,
constructive algorithms
,
dfs and similar
,
greedy
,
trees
3400
x358
768G
The Winds of Winter
binary search
,
data structures
3300
x353
1408H
Rainbow Triples
binary search
,
data structures
,
flows
,
greedy
3300
x351
1359F
RC Kaboom Show
binary search
,
brute force
,
data structures
,
geometry
,
math
2900
x349
883D
Packmen Strike Back
binary search
,
dp
,
math
2500
x349
518F
Pasha and Pipe
binary search
,
brute force
,
combinatorics
,
dp
,
implementation
2300
x348
533A
Berland Miners
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
3000
x345
1776M
Parmigiana With Seafood
binary search
,
dp
,
greedy
,
trees
3000
x343
←
1
2
...
7
8
9
10
11
→
User lists
Name