Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round 968 (Div. 2)
2 days
Register now »
*has extra registration
→ Filter Problems
Difficulty:
—
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
1585A
Life of a Flower
implementation
800
x17682
1584A
Mathematical Addition
math
800
x14830
1583A
Windblume Ode
math
,
number theory
800
x13694
1582A
Luntik and Concerts
math
800
x18448
1581A
CQXYM Count Permutations
combinatorics
,
math
,
number theory
800
x13366
1579A
Casimir's String Solitaire
math
,
strings
800
x38545
1574A
Regular Bracket Sequences
constructive algorithms
800
x21691
1573A
Countdown
greedy
800
x21092
1571A
Sequence of Comparisons
*special problem
800
x1286
1569A
Balanced Substring
implementation
800
x25462
1567A
Domino Disaster
implementation
,
strings
800
x29962
1566B
MIN-MEX Cut
bitmasks
,
constructive algorithms
,
dp
,
greedy
800
x19465
1566A
Median Maximization
binary search
,
greedy
,
math
800
x23109
1562A
The Miracle and the Sleeper
greedy
,
math
800
x25415
1561A
Simply Strange Sort
brute force
,
implementation
,
sortings
800
x16525
1560C
Infinity Table
implementation
,
math
800
x26490
1560B
Who's Opposite?
math
800
x35361
1560A
Dislike of Threes
implementation
800
x58645
1557A
Ezzat and Two Subsequences
brute force
,
math
,
sortings
800
x27812
1556A
A Variety of Operations
math
800
x18032
1554A
Cherry
greedy
800
x29105
1553A
Digits Sum
math
,
number theory
800
x30766
1552A
Subsequence Permutation
sortings
,
strings
800
x23727
1551B1
Wonderful Coloring - 1
greedy
,
strings
800
x29062
1551A
Polycarp and Coins
greedy
,
math
800
x50140
1550A
Find The Array
greedy
,
math
800
x27976
1549B
Gregor and the Pawn Game
dfs and similar
,
dp
,
flows
,
graph matchings
,
graphs
,
greedy
,
implementation
800
x24212
1549A
Gregor and Cryptography
math
,
number theory
800
x32158
1547B
Alphabetical Strings
greedy
,
implementation
,
strings
800
x26265
1547A
Shortest Path with Obstacle
implementation
,
math
800
x30290
1546A
AquaMoon and Two Arrays
brute force
,
greedy
800
x18174
1542A
Odd Set
math
800
x44146
1541A
Pretty Permutations
constructive algorithms
,
greedy
,
implementation
800
x29271
1539B
Love Song
dp
,
implementation
,
strings
800
x24275
1538B
Friends and Candies
greedy
,
math
800
x31531
1538A
Stone Game
brute force
,
dp
,
greedy
800
x36541
1537A
Arithmetic Array
greedy
,
math
800
x36877
1536A
Omkar and Bad Story
brute force
,
constructive algorithms
800
x20155
1535A
Fair Playoff
brute force
,
implementation
800
x48523
1534A
Colour the Flag
brute force
,
implementation
800
x12678
1530B
Putting Plates
constructive algorithms
,
implementation
800
x15756
1530A
Binary Decimal
greedy
,
math
800
x21004
1529A
Eshag Loves Big Arrays
constructive algorithms
,
greedy
,
math
800
x29649
1527A
And Then There Were K
bitmasks
800
x35128
1526A
Mean Inequality
constructive algorithms
,
sortings
800
x24079
1525A
Potion-making
math
,
number theory
800
x25280
1523A
Game of Life
implementation
800
x13461
1520B
Ordinary Numbers
brute force
,
math
,
number theory
800
x43968
1520A
Do Not Be Distracted!
brute force
,
implementation
800
x51154
1519B
The Cake Is a Lie
dp
,
math
800
x30622
1519A
Red and Blue Beans
math
800
x28613
1517A
Sum of 2050
greedy
,
math
800
x25426
1516A
Tit for Tat
greedy
800
x23313
1515A
Phoenix and Gold
constructive algorithms
,
greedy
,
math
800
x20182
1514A
Perfectly Imperfect Array
math
,
number theory
800
x24029
1513A
Array and Peaks
constructive algorithms
,
implementation
800
x19321
1512B
Almost Rectangle
implementation
800
x25279
1512A
Spy Detected!
brute force
,
implementation
800
x62737
1511A
Review Site
greedy
800
x27493
1509A
Average Height
constructive algorithms
800
x25927
1506A
Strange Table
math
800
x30494
1504A
Déjà Vu
constructive algorithms
,
strings
800
x21623
1501A
Alexey and Train
implementation
800
x11556
1499A
Domino on Windowsill
combinatorics
,
constructive algorithms
,
math
800
x21203
1498A
GCD Sum
brute force
,
math
800
x23081
1497A
Meximization
brute force
,
data structures
,
greedy
,
sortings
800
x24208
1493A
Anti-knapsack
constructive algorithms
,
greedy
800
x19250
1492A
Three swimmers
math
800
x22578
1491A
K-th Largest Value
brute force
,
greedy
,
implementation
800
x18192
1490A
Dense Array
greedy
,
math
800
x31019
1487A
Arena
implementation
,
sortings
800
x26431
1482A
Prison Break
math
800
x20349
1481A
Space Navigation
greedy
,
strings
800
x24851
1480A
Yet Another String Game
games
,
greedy
,
strings
800
x25739
1478A
Nezzar and Colorful Balls
brute force
,
greedy
800
x26075
1474A
Puzzle From the Future
greedy
800
x22373
1473A
Replacing Elements
greedy
,
implementation
,
math
,
sortings
800
x33451
1472B
Fair Division
dp
,
greedy
,
math
800
x49421
1472A
Cards for Friends
greedy
,
math
800
x41624
1468E
Four Segments
greedy
800
x8760
1466B
Last minute enhancements
dp
,
greedy
800
x22586
1466A
Bovine Dilemma
brute force
,
geometry
,
math
800
x22485
1462B
Last Year's Substring
dp
,
implementation
,
strings
800
x26998
1462A
Favorite Sequence
implementation
,
two pointers
800
x41232
1461A
String Generation
constructive algorithms
,
greedy
800
x18545
1459A
Red-Blue Shuffle
math
,
probabilities
800
x16967
1455A
Strange Functions
math
,
number theory
800
x26331
1454B
Unique Bid Auction
implementation
800
x27990
1454A
Special Permutation
constructive algorithms
,
probabilities
800
x40135
1453A
Cancel the Trains
implementation
800
x22484
1452C
Two Brackets
greedy
800
x19385
1452A
Robot Program
math
800
x22017
1451A
Subtract or Divide
greedy
,
math
800
x24137
1450A
Avoid Trygub
constructive algorithms
,
sortings
800
x17939
1447A
Add Candies
constructive algorithms
,
math
800
x13768
1445A
Array Rearrangment
greedy
,
sortings
800
x19069
1443A
Kids Seating
constructive algorithms
,
math
800
x16193
1440A
Buy the String
implementation
,
math
800
x19679
1438A
Specific Tastes of Andre
constructive algorithms
,
implementation
800
x19213
1437A
Marketing Scheme
brute force
,
constructive algorithms
,
greedy
,
math
800
x17990
←
1
2
3
4
5
6
7
8
9
→
User lists
Name