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Contest is running
Codeforces Global Round 13
00:21:55
→ 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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Problems
#
Name
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x57700
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x41674
443A
Anton and Letters
constructive algorithms
,
implementation
800
x39240
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x30789
1343B
Balanced Array
constructive algorithms
,
math
800
x29960
1353A
Most Unstable Array
constructive algorithms
,
greedy
,
math
800
x25940
1454A
Special Permutation
constructive algorithms
,
probabilities
800
x23873
1337A
Ichihime and Triangle
constructive algorithms
,
math
800
x23386
1372A
Omkar and Completion
constructive algorithms
,
implementation
800
x23230
1325A
EhAb AnD gCd
constructive algorithms
,
greedy
,
number theory
800
x22756
1389A
LCM Problem
constructive algorithms
,
greedy
,
math
,
number theory
800
x22678
1400A
String Similarity
constructive algorithms
,
strings
800
x21160
1196A
Three Piles of Candies
brute force
,
constructive algorithms
,
math
800
x20652
1391A
Suborrays
constructive algorithms
,
math
800
x20055
686A
Free Ice Cream
constructive algorithms
,
implementation
800
x18958
1405A
Permutation Forgery
constructive algorithms
800
x17855
513A
Game
constructive algorithms
,
math
800
x15808
1438A
Specific Tastes of Andre
constructive algorithms
,
implementation
800
x15099
1461A
String Generation
constructive algorithms
,
greedy
800
x14992
1437A
Marketing Scheme
brute force
,
constructive algorithms
,
greedy
,
math
800
x14974
1450A
Avoid Trygub
constructive algorithms
,
sortings
800
x13915
1443A
Kids Seating
constructive algorithms
,
math
800
x13411
1104A
Splitting into digits
constructive algorithms
,
implementation
,
math
800
x13027
1088A
Ehab and another construction problem
brute force
,
constructive algorithms
800
x12611
1413A
Finding Sasuke
constructive algorithms
,
math
800
x12044
1305A
Kuroni and the Gifts
brute force
,
constructive algorithms
,
greedy
,
sortings
800
x11804
595A
Vitaly and Night
constructive algorithms
,
implementation
800
x11652
1447A
Add Candies
constructive algorithms
,
math
800
x11020
1408A
Circle Coloring
constructive algorithms
800
x10928
676A
Nicholas and Permutation
constructive algorithms
,
implementation
800
x10834
854A
Fraction
brute force
,
constructive algorithms
,
math
800
x10648
361A
Levko and Table
constructive algorithms
,
implementation
800
x10429
680A
Bear and Five Cards
constructive algorithms
,
implementation
800
x10041
629A
Far Relative’s Birthday Cake
brute force
,
combinatorics
,
constructive algorithms
,
implementation
800
x9589
1081A
Definite Game
constructive algorithms
,
math
800
x8999
932A
Palindromic Supersequence
constructive algorithms
800
x8520
899A
Splitting in Teams
constructive algorithms
,
greedy
,
math
800
x8161
421A
Pasha and Hamsters
constructive algorithms
,
implementation
800
x3909
1335B
Construct the String
constructive algorithms
900
x24892
1401A
Distance and Axis
constructive algorithms
,
math
900
x19897
1433C
Dominant Piranha
constructive algorithms
,
greedy
900
x17790
1467A
Wizard of Orz
constructive algorithms
,
greedy
,
math
900
x17173
1430A
Number of Apartments
brute force
,
constructive algorithms
,
math
900
x14824
768A
Oath of the Night's Watch
constructive algorithms
,
sortings
900
x14643
1436B
Prime Square
constructive algorithms
,
math
900
x14424
199A
Hexadecimal's theorem
brute force
,
constructive algorithms
,
implementation
,
number theory
900
x12553
670A
Holidays
brute force
,
constructive algorithms
,
greedy
,
math
900
x12036
1093B
Letters Rearranging
constructive algorithms
,
greedy
,
sortings
,
strings
900
x11384
764B
Timofey and cubes
constructive algorithms
,
implementation
900
x9166
814A
An abandoned sentiment from past
constructive algorithms
,
greedy
,
implementation
,
sortings
900
x8503
801B
Valued Keys
constructive algorithms
,
greedy
,
strings
900
x7588
246A
Buggy Sorting
constructive algorithms
,
greedy
,
sortings
900
x6679
11A
Increasing Sequence
constructive algorithms
,
implementation
,
math
900
x6325
1326A
Bad Ugly Numbers
constructive algorithms
,
number theory
1000
x19375
1333A
Little Artem
constructive algorithms
1000
x18854
688B
Lovely Palindromes
constructive algorithms
,
math
1000
x17572
766B
Mahmoud and a Triangle
constructive algorithms
,
geometry
,
greedy
,
math
,
number theory
,
sortings
1000
x17169
1469A
Regular Bracket Sequence
constructive algorithms
,
greedy
1000
x16727
1312B
Bogosort
constructive algorithms
,
sortings
1000
x16591
1476A
K-divisible Sum
binary search
,
constructive algorithms
,
greedy
,
math
1000
x16426
118B
Present from Lena
constructive algorithms
,
implementation
1000
x16189
766A
Mahmoud and Longest Uncommon Subsequence
constructive algorithms
,
strings
1000
x16074
1474B
Different Divisors
binary search
,
constructive algorithms
,
greedy
,
math
,
number theory
1000
x15358
1405B
Array Cancellation
constructive algorithms
,
implementation
1000
x15125
680B
Bear and Finding Criminals
constructive algorithms
,
implementation
1000
x14450
1419D1
Sage's Birthday (easy version)
binary search
,
constructive algorithms
,
greedy
,
sortings
1000
x14255
1490B
Balanced Remainders
brute force
,
constructive algorithms
,
math
1000
x13996
798A
Mike and palindrome
brute force
,
constructive algorithms
,
strings
1000
x13415
1430C
Numbers on Whiteboard
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
1000
x12958
672B
Different is Good
constructive algorithms
,
implementation
,
strings
1000
x12314
1174A
Ehab Fails to Be Thanos
constructive algorithms
,
greedy
,
sortings
1000
x12149
1438B
Valerii Against Everyone
constructive algorithms
,
data structures
,
greedy
,
sortings
1000
x12031
804A
Find Amir
constructive algorithms
,
greedy
,
math
1000
x11898
761A
Dasha and Stairs
brute force
,
constructive algorithms
,
implementation
,
math
1000
x11554
1265A
Beautiful String
constructive algorithms
,
greedy
1000
x11345
805B
3-palindrome
constructive algorithms
1000
x11039
1144C
Two Shuffled Sequences
constructive algorithms
,
sortings
1000
x10843
1266B
Dice Tower
constructive algorithms
,
math
1000
x10074
1136B
Nastya Is Playing Computer Games
constructive algorithms
,
math
1000
x9439
777A
Shell Game
constructive algorithms
,
implementation
,
math
1000
x8031
779A
Pupils Redistribution
constructive algorithms
,
math
1000
x7783
998A
Balloons
constructive algorithms
,
implementation
1000
x7498
359A
Table
constructive algorithms
,
greedy
,
implementation
1000
x6066
637A
Voting for Photos
*special problem
,
constructive algorithms
,
implementation
1000
x4186
644A
Parliament of Berland
*special problem
,
constructive algorithms
1000
x3783
491A
Up the hill
constructive algorithms
,
implementation
1000
x1558
467B
Fedor and New Game
bitmasks
,
brute force
,
constructive algorithms
,
implementation
1100
x20976
1360C
Similar Pairs
constructive algorithms
,
graph matchings
,
greedy
,
sortings
1100
x20796
1342B
Binary Period
constructive algorithms
,
strings
1100
x18316
1370B
GCD Compression
constructive algorithms
,
math
,
number theory
1100
x17471
1401B
Ternary Sequence
constructive algorithms
,
greedy
,
math
1100
x16632
1407A
Ahahahahahahahaha
constructive algorithms
,
math
1100
x15222
1375A
Sign Flipping
constructive algorithms
,
math
1100
x14962
1455C
Ping-pong
constructive algorithms
,
games
,
math
1100
x13860
1304B
Longest Palindrome
brute force
,
constructive algorithms
,
greedy
,
implementation
,
strings
1100
x13662
1395B
Boboniu Plays Chess
constructive algorithms
1100
x13509
1426C
Increase and Copy
binary search
,
constructive algorithms
,
math
1100
x12908
682A
Alyona and Numbers
constructive algorithms
,
math
,
number theory
1100
x12549
300A
Array
brute force
,
constructive algorithms
,
implementation
1100
x12437
1421B
Putting Bricks in the Wall
constructive algorithms
,
implementation
1100
x10205
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