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Before contest
CodeCraft-22 and Codeforces Round #795 (Div. 2)
3 days
→ Filter Problems
Difficulty:
—
constructive algorithms
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
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Status
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Custom test
Problems
#
Name
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x86090
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x59306
443A
Anton and Letters
constructive algorithms
,
implementation
800
x55748
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x43893
1343B
Balanced Array
constructive algorithms
,
math
800
x39563
1353A
Most Unstable Array
constructive algorithms
,
greedy
,
math
800
x31916
1454A
Special Permutation
constructive algorithms
,
probabilities
800
x31396
1335B
Construct the String
constructive algorithms
900
x30035
1325A
EhAb AnD gCd
constructive algorithms
,
greedy
,
number theory
800
x29344
1389A
LCM Problem
constructive algorithms
,
greedy
,
math
,
number theory
800
x28614
1337A
Ichihime and Triangle
constructive algorithms
,
math
800
x28124
1372A
Omkar and Completion
constructive algorithms
,
implementation
800
x27663
467B
Fedor and New Game
bitmasks
,
brute force
,
constructive algorithms
,
implementation
1100
x27308
478B
Random Teams
combinatorics
,
constructive algorithms
,
greedy
,
math
1300
x26834
1360C
Similar Pairs
constructive algorithms
,
graph matchings
,
greedy
,
sortings
1100
x25697
1529A
Eshag Loves Big Arrays
constructive algorithms
,
greedy
,
math
800
x25668
1352B
Same Parity Summands
constructive algorithms
,
math
1200
x25312
1521A
Nastia and Nearly Good Numbers
constructive algorithms
,
math
,
number theory
1000
x25266
1541A
Pretty Permutations
constructive algorithms
,
greedy
,
implementation
800
x24705
686A
Free Ice Cream
constructive algorithms
,
implementation
800
x24536
1400A
String Similarity
constructive algorithms
,
strings
800
x24290
1611A
Make Even
constructive algorithms
,
math
800
x24234
1476A
K-divisible Sum
binary search
,
constructive algorithms
,
greedy
,
math
1000
x24146
1626A
Equidistant Letters
constructive algorithms
,
sortings
800
x23967
1520C
Not Adjacent Matrix
constructive algorithms
1000
x23804
1196A
Three Piles of Candies
brute force
,
constructive algorithms
,
math
800
x23743
1326A
Bad Ugly Numbers
constructive algorithms
,
number theory
1000
x23736
1401A
Distance and Axis
constructive algorithms
,
math
900
x23349
1391A
Suborrays
constructive algorithms
,
math
800
x22473
1335D
Anti-Sudoku
constructive algorithms
,
implementation
1300
x22447
1509A
Average Height
constructive algorithms
800
x22411
1433C
Dominant Piranha
constructive algorithms
,
greedy
900
x22318
1537B
Bad Boy
constructive algorithms
,
greedy
,
math
900
x21939
688B
Lovely Palindromes
constructive algorithms
,
math
1000
x21886
766B
Mahmoud and a Triangle
constructive algorithms
,
geometry
,
greedy
,
math
,
number theory
,
sortings
1000
x21742
1333A
Little Artem
constructive algorithms
1000
x21711
1526A
Mean Inequality
constructive algorithms
,
sortings
800
x21458
1469A
Regular Bracket Sequence
constructive algorithms
,
greedy
1000
x21412
1621A
Stable Arrangement of Rooks
constructive algorithms
800
x21367
1490B
Balanced Remainders
brute force
,
constructive algorithms
,
math
1000
x21309
1339B
Sorted Adjacent Differences
constructive algorithms
,
sortings
1200
x21265
1627A
Not Shading
constructive algorithms
,
implementation
800
x21220
1365B
Trouble Sort
constructive algorithms
,
implementation
1300
x21217
1467A
Wizard of Orz
constructive algorithms
,
greedy
,
math
900
x21024
1342B
Binary Period
constructive algorithms
,
strings
1100
x20894
118B
Present from Lena
constructive algorithms
,
implementation
1000
x20868
1611B
Team Composition: Programmers and Mathematicians
binary search
,
constructive algorithms
,
math
800
x20569
1559A
Mocha and Math
bitmasks
,
constructive algorithms
,
math
900
x20512
1370B
GCD Compression
constructive algorithms
,
math
,
number theory
1100
x20367
1525B
Permutation Sort
constructive algorithms
,
greedy
900
x20199
1348B
Phoenix and Beauty
constructive algorithms
,
data structures
,
greedy
,
sortings
1400
x20179
1474B
Different Divisors
binary search
,
constructive algorithms
,
greedy
,
math
,
number theory
1000
x20158
766A
Mahmoud and Longest Uncommon Subsequence
constructive algorithms
,
strings
1000
x20128
1405A
Permutation Forgery
constructive algorithms
800
x20115
1614A
Divan and a Store
brute force
,
constructive algorithms
,
greedy
800
x20113
1312B
Bogosort
constructive algorithms
,
sortings
1000
x19883
1499A
Domino on Windowsill
combinatorics
,
constructive algorithms
,
math
800
x19529
1367C
Social Distance
constructive algorithms
,
greedy
,
math
1300
x19381
1574A
Regular Bracket Sequences
constructive algorithms
800
x19209
1401C
Mere Array
constructive algorithms
,
math
,
number theory
,
sortings
1300
x19138
1638A
Reverse
constructive algorithms
,
greedy
,
math
800
x19089
1401B
Ternary Sequence
constructive algorithms
,
greedy
,
math
1100
x19049
1504A
Déjà Vu
constructive algorithms
,
strings
800
x19036
1674A
Number Transformation
constructive algorithms
,
math
800
x18904
1537C
Challenging Cliffs
constructive algorithms
,
greedy
,
implementation
,
math
1200
x18825
1419D1
Sage's Birthday (easy version)
binary search
,
constructive algorithms
,
greedy
,
sortings
1000
x18686
1515A
Phoenix and Gold
constructive algorithms
,
greedy
,
math
800
x18654
1624C
Division by Two and Permutation
constructive algorithms
,
flows
,
graph matchings
,
greedy
,
math
1100
x18614
1536A
Omkar and Bad Story
brute force
,
constructive algorithms
800
x18603
1665A
GCD vs LCM
constructive algorithms
,
math
800
x18554
1405B
Array Cancellation
constructive algorithms
,
implementation
1000
x18354
1644B
Anti-Fibonacci Permutation
brute force
,
constructive algorithms
,
implementation
800
x18321
768A
Oath of the Night's Watch
constructive algorithms
,
sortings
900
x18300
1527B1
Palindrome Game (easy version)
constructive algorithms
,
games
1200
x18254
1620A
Equal or Not Equal
constructive algorithms
,
dsu
,
implementation
800
x18217
1365C
Rotation Matching
constructive algorithms
,
data structures
,
greedy
,
implementation
1400
x18208
1430A
Number of Apartments
brute force
,
constructive algorithms
,
math
900
x18017
1438A
Specific Tastes of Andre
constructive algorithms
,
implementation
800
x17943
1407A
Ahahahahahahahaha
constructive algorithms
,
math
1100
x17935
680B
Bear and Finding Criminals
constructive algorithms
,
implementation
1000
x17899
1511B
GCD Length
constructive algorithms
,
math
,
number theory
1100
x17863
1513A
Array and Peaks
constructive algorithms
,
implementation
800
x17821
199A
Hexadecimal's theorem
brute force
,
constructive algorithms
,
implementation
,
number theory
900
x17799
1493A
Anti-knapsack
constructive algorithms
,
greedy
800
x17742
1658A
Marin and Photoshoot
constructive algorithms
,
implementation
,
math
800
x17739
1497C1
k-LCM (easy version)
constructive algorithms
,
math
1200
x17702
513A
Game
constructive algorithms
,
math
800
x17693
1436B
Prime Square
constructive algorithms
,
math
900
x17651
1684A
Digit Minimization
constructive algorithms
,
games
,
math
,
strings
800
x17576
1496A
Split it!
brute force
,
constructive algorithms
,
greedy
,
strings
900
x17572
1433D
Districts Connection
constructive algorithms
,
dfs and similar
1200
x17553
1455B
Jumps
constructive algorithms
,
math
1200
x17520
1430C
Numbers on Whiteboard
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
1000
x17514
1651B
Prove Him Wrong
constructive algorithms
,
greedy
800
x17482
1381A1
Prefix Flip (Easy Version)
constructive algorithms
,
data structures
,
strings
1300
x17409
1461A
String Generation
constructive algorithms
,
greedy
800
x17375
4B
Before an Exam
constructive algorithms
,
greedy
1200
x17372
1455C
Ping-pong
constructive algorithms
,
games
,
math
1100
x17004
1646B
Quality vs Quantity
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
800
x16963
1437A
Marketing Scheme
brute force
,
constructive algorithms
,
greedy
,
math
800
x16931
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