Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Educational Codeforces Round 195 (Rated for Div. 2)
11:08:59
Register now »
→ Filter Problems
Difficulty:
—
combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
communication
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
742B
Arpa’s obvious problem and Mehrdad’s terrible solution
brute force
,
math
,
number theory
1500
x10191
740B
Alyona and flowers
constructive algorithms
1200
x8978
740A
Alyona and copybooks
brute force
,
implementation
1300
x9217
735B
Urbanization
greedy
,
number theory
,
sortings
1100
x8824
733B
Parade
math
1100
x11036
732C
Sanatorium
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1200
x10269
731B
Coupons and Discounts
constructive algorithms
,
greedy
1100
x8401
730H
Delete Them
constructive algorithms
,
implementation
1300
x3318
729B
Spotlights
dp
,
implementation
1200
x8853
727C
Guess the Array
constructive algorithms
,
interactive
,
math
1400
x9372
725B
Food on the Plane
implementation
,
math
1200
x5425
724B
Batch Sort
brute force
,
greedy
,
implementation
,
math
1500
x4278
723B
Text Document Analysis
expression parsing
,
implementation
,
strings
1100
x11082
722B
Verse Pattern
implementation
,
strings
1200
x6840
722A
Broken Clock
brute force
,
implementation
1300
x7009
721B
Passwords
implementation
,
math
,
sortings
,
strings
1100
x12561
719B
Anatoly and Cockroaches
greedy
1400
x8876
719A
Vitya in the Countryside
implementation
1100
x16533
717C
Potions Homework
implementation
,
sortings
1200
x4384
716B
Complete the Word
greedy
,
two pointers
1300
x13346
714B
Filya and Homework
implementation
,
sortings
1200
x15713
714A
Meeting of Old Friends
implementation
,
math
1100
x11220
713A
Sonya and Queries
data structures
,
implementation
1400
x8929
712B
Memory and Trident
implementation
,
strings
1100
x10443
711B
Chris and Magic Square
constructive algorithms
,
implementation
1400
x8696
710C
Magic Odd Square
constructive algorithms
,
math
1500
x5666
710B
Optimal Point on a Line
brute force
,
sortings
1400
x10806
709B
Checkpoints
greedy
,
implementation
,
sortings
1500
x5067
708A
Letters Cyclic Shift
constructive algorithms
,
greedy
,
implementation
,
strings
1200
x10013
707C
Pythagorean Triples
math
,
number theory
1500
x13708
707B
Bakery
graphs
1300
x13739
706B
Interesting drink
binary search
,
dp
,
implementation
1100
x92429
705B
Spider Man
games
,
math
1100
x9646
703B
Mishka and trip
implementation
,
math
1400
x6110
702C
Cellular Network
binary search
,
implementation
,
two pointers
1500
x25231
702B
Powers of Two
brute force
,
data structures
,
implementation
,
math
1500
x14145
701C
They Are Everywhere
binary search
,
strings
,
two pointers
1500
x21411
701B
Cells Not Under Attack
data structures
,
math
1200
x12731
699B
One Bomb
implementation
1400
x8023
698A
Vacations
dp
1400
x40950
697B
Barnicle
brute force
,
implementation
,
math
,
strings
1400
x6073
696A
Lorenzo Von Matterhorn
brute force
,
data structures
,
implementation
,
trees
1500
x6548
690F1
Tree of Life (easy)
1300
x2462
690D1
The Wall (easy)
1200
x2976
690C2
Brain Network (medium)
dfs and similar
,
graphs
,
trees
1500
x5208
690C1
Brain Network (easy)
1300
x3263
690A1
Collective Mindsets (easy)
1100
x3132
689A
Mike and Cellphone
brute force
,
constructive algorithms
,
implementation
1400
x5548
687A
NP-Hard Problem
dfs and similar
,
graphs
1500
x17191
686B
Little Robber Girl's Zoo
constructive algorithms
,
implementation
,
sortings
1100
x8071
683D
Chocolate Bar
*special problem
,
math
1400
x399
683A
The Check of the Point
*special problem
,
geometry
1200
x1280
682B
Alyona and Mex
sortings
1200
x12882
682A
Alyona and Numbers
constructive algorithms
,
math
,
number theory
1100
x24495
681B
Economy Game
brute force
1300
x9600
679A
Bear and Prime 100
constructive algorithms
,
interactive
,
math
1400
x16275
677C
Vanya and Label
bitmasks
,
combinatorics
,
implementation
,
strings
1500
x7096
677B
Vanya and Food Processor
implementation
,
math
1400
x8012
676C
Vasya and String
binary search
,
dp
,
strings
,
two pointers
1500
x24031
676B
Pyramid of Glasses
implementation
,
math
,
math
1500
x5878
675B
Restoring Painting
brute force
,
constructive algorithms
,
math
1400
x7819
675A
Infinite Sequence
math
1100
x15803
673B
Problems for Round
greedy
,
implementation
1300
x3709
670D2
Magic Powder - 2
binary search
,
implementation
1500
x21210
670D1
Magic Powder - 1
binary search
,
brute force
,
implementation
1400
x25961
670C
Cinema
implementation
,
sortings
1300
x10215
667B
Coat of Anticubism
constructive algorithms
,
geometry
1100
x5962
667A
Pouring Rain
geometry
,
math
1100
x8628
665C
Simple Strings
dp
,
greedy
,
strings
1300
x19416
665B
Shopping
brute force
1400
x3936
661A
Lazy Caterer Sequence
*special problem
1300
x663
660A
Co-prime Array
greedy
,
implementation
,
math
,
number theory
1200
x10780
659D
Bicycle Race
geometry
,
implementation
,
math
1500
x6803
659C
Tanya and Toys
greedy
,
implementation
1200
x12070
659B
Qualifying Contest
constructive algorithms
,
sortings
1300
x6699
653B
Bear and Compressing
brute force
,
dfs and similar
,
dp
,
strings
1300
x5440
652A
Gabriel and Caterpillar
implementation
,
math
1400
x5332
651B
Beautiful Paintings
greedy
,
sortings
1200
x12395
651A
Joysticks
dp
,
greedy
,
implementation
,
math
1100
x24404
650A
Watchmen
data structures
,
geometry
,
math
1400
x16842
649C
Печать условий
constructive algorithms
,
greedy
,
sortings
1500
x575
649B
Этажи
constructive algorithms
1400
x650
648C
Путь Робота
constructive algorithms
,
dfs and similar
,
graphs
1100
x1453
645B
Mischievous Mess Makers
greedy
,
math
1200
x3761
645A
Amity Assessment
brute force
,
constructive algorithms
,
implementation
1200
x3845
643A
Bear and Colors
implementation
1500
x4860
641B
Little Artem and Matrix
implementation
1400
x4417
639A
Bear and Displayed Friends
implementation
1200
x6577
638B
Making Genome in Berland
*special problem
,
dfs and similar
,
strings
1500
x2147
638A
Home Numbers
*special problem
,
constructive algorithms
,
math
1100
x4421
637C
Promocodes with Mistakes
*special problem
,
brute force
,
constructive algorithms
,
implementation
1400
x2543
637B
Chat Order
*special problem
,
binary search
,
constructive algorithms
,
data structures
,
sortings
1200
x25189
635A
Orchestra
brute force
,
implementation
1100
x3291
634A
Island Puzzle
constructive algorithms
,
implementation
1300
x3484
633B
A Trivial Problem
brute force
,
constructive algorithms
,
math
,
number theory
1300
x7369
633A
Ebony and Ivory
brute force
,
math
,
number theory
1100
x15154
632B
Alice, Bob, Two Teams
brute force
,
constructive algorithms
1400
x4471
632A
Grandma Laura and Apples
1200
x5009
631B
Print Check
constructive algorithms
,
implementation
1200
x7953
630R
Game
games
,
math
1200
x9774
←
1
2
...
15
16
17
18
19
...
23
24
→
User lists
Name