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Codeforces Round 937 (Div. 4)
01:03:02
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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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Custom test
Problems
#
Name
1413B
A New Technique
implementation
1100
x11581
1255B
Fridge Lockers
graphs
,
implementation
1100
x11603
382A
Ksenia and Pan Scales
greedy
,
implementation
1100
x11626
1030B
Vasya and Cornfield
geometry
1100
x11765
841B
Godsend
games
,
math
1100
x11900
6B
President's Office
implementation
1100
x11904
721B
Passwords
implementation
,
math
,
sortings
,
strings
1100
x11930
1523B
Lord of the Values
constructive algorithms
1100
x11931
1415B
Repainting Street
brute force
,
brute force
,
greedy
1100
x11975
534A
Exam
constructive algorithms
,
implementation
,
math
1100
x11977
633A
Ebony and Ivory
brute force
,
math
,
number theory
1100
x12067
1836B
Astrophysicists
greedy
,
math
1100
x12151
1904B
Collecting Game
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1100
x12187
1534B
Histogram Ugliness
greedy
,
implementation
,
math
1100
x12324
1670B
Dorms War
brute force
,
implementation
,
strings
1100
x12349
1042A
Benches
binary search
,
implementation
1100
x12435
1787B
Number Factorization
greedy
,
math
,
number theory
1100
x12583
1944B
Equal XOR
bitmasks
,
constructive algorithms
1100
x12638
869B
The Eternal Immortality
math
1100
x12774
1672C
Unequal Array
constructive algorithms
,
greedy
,
implementation
1100
x12817
581B
Luxurious Houses
implementation
,
math
1100
x12859
1421B
Putting Bricks in the Wall
constructive algorithms
,
implementation
1100
x12862
285A
Slightly Decreasing Permutations
greedy
,
implementation
1100
x12905
1820B
JoJo's Incredible Adventures
math
,
strings
,
two pointers
1100
x12980
1902B
Getting Points
binary search
,
brute force
,
greedy
1100
x12994
1038B
Non-Coprime Partition
constructive algorithms
,
math
1100
x13010
1863C
MEX Repetition
implementation
,
math
1100
x13173
471A
MUH and Sticks
implementation
1100
x13303
116B
Little Pigs and Wolves
greedy
,
implementation
1100
x13350
160B
Unlucky Ticket
greedy
,
sortings
1100
x13360
1165A
Remainder
implementation
,
math
1100
x13375
362B
Petya and Staircases
implementation
,
sortings
1100
x13442
1189B
Number Circle
greedy
,
math
,
sortings
1100
x13581
259B
Little Elephant and Magic Square
brute force
,
implementation
1100
x13629
427B
Prison Transfer
data structures
,
implementation
1100
x13640
1901B
Chip and Ribbon
greedy
,
math
1100
x13672
1566D1
Seating Arrangements (easy version)
data structures
,
greedy
,
sortings
1100
x13672
797A
k-Factorization
implementation
,
math
,
number theory
1100
x13695
570A
Elections
implementation
1100
x13713
525A
Vitaliy and Pie
greedy
,
hashing
,
strings
1100
x13713
1602B
Divine Array
constructive algorithms
,
implementation
1100
x13761
1623B
Game on Ranges
brute force
,
dfs and similar
,
implementation
,
sortings
1100
x13852
1869B
2D Traveling
geometry
,
math
,
shortest paths
,
sortings
1100
x13930
365B
The Fibonacci Segment
implementation
1100
x13971
488A
Giga Tower
brute force
1100
x13977
527A
Playing with Paper
implementation
,
math
1100
x14026
1673B
A Perfectly Balanced String?
brute force
,
greedy
,
strings
1100
x14035
1066A
Vova and Train
math
1100
x14183
1797B
Li Hua and Pattern
constructive algorithms
,
greedy
1100
x14193
1417B
Two Arrays
greedy
,
math
,
sortings
1100
x14295
1839B
Lamps
greedy
,
sortings
1100
x14340
1863B
Split Sort
greedy
,
math
,
sortings
1100
x14379
1717B
Madoka and Underground Competitions
constructive algorithms
,
implementation
1100
x14407
1610B
Kalindrome Array
greedy
,
two pointers
1100
x14433
1726B
Mainak and Interesting Sequence
bitmasks
,
constructive algorithms
,
math
1100
x14528
1637B
MEX and Array
brute force
,
dp
,
greedy
,
math
1100
x14546
1864B
Swap and Reverse
constructive algorithms
,
greedy
,
sortings
,
strings
1100
x14618
675A
Infinite Sequence
math
1100
x14711
1946B
Maximum Sum
dp
,
greedy
,
math
1100
x14784
1293A
ConneR and the A.R.C. Markland-N
binary search
,
brute force
,
implementation
1100
x14801
1905B
Begginer's Zelda
greedy
,
trees
1100
x14880
1793B
Fedya and Array
constructive algorithms
,
math
1100
x15073
242B
Big Segment
implementation
,
sortings
1100
x15090
1891B
Deja Vu
brute force
,
math
,
sortings
1100
x15165
1157A
Reachable Numbers
implementation
1100
x15170
1842B
Tenzing and Books
bitmasks
,
greedy
,
math
1100
x15210
1826B
Lunatic Never Content
math
,
number theory
1100
x15297
501B
Misha and Changing Handles
data structures
,
dsu
,
strings
1100
x15331
1923B
Monsters Attack!
dp
,
greedy
,
implementation
1100
x15357
719A
Vitya in the Countryside
implementation
1100
x15361
1604B
XOR Specia-LIS-t
1100
x15367
43B
Letter
implementation
,
strings
1100
x15454
1867B
XOR Palindromes
bitmasks
,
constructive algorithms
,
strings
1100
x15477
433A
Kitahara Haruki's Gift
brute force
,
implementation
1100
x15485
218B
Airport
implementation
1100
x15602
1838B
Minimize Permutation Subarrays
constructive algorithms
,
math
1100
x15673
1395B
Boboniu Plays Chess
constructive algorithms
1100
x15754
1263A
Sweet Problem
math
1100
x15783
1625B
Elementary Particles
brute force
,
greedy
,
sortings
1100
x15795
1762B
Make Array Good
constructive algorithms
,
implementation
,
number theory
,
sortings
1100
x16061
186A
Comparing Strings
implementation
,
strings
1100
x16114
1706B
Making Towers
dp
,
greedy
,
math
1100
x16121
1780B
GCD Partition
brute force
,
greedy
,
math
,
number theory
1100
x16223
1685A
Circular Local MiniMax
constructive algorithms
,
greedy
,
sortings
1100
x16365
166A
Rank List
binary search
,
implementation
,
sortings
1100
x16436
1731B
Kill Demodogs
greedy
,
math
1100
x16441
1821B
Sort the Subarray
brute force
,
greedy
1100
x16497
1288B
Yet Another Meme Problem
math
1100
x16623
1176B
Merge it!
math
1100
x16697
1759C
Thermostat
greedy
,
math
,
shortest paths
1100
x16815
1682B
AND Sorting
bitmasks
,
constructive algorithms
,
sortings
1100
x16872
1574B
Combinatorics Homework
combinatorics
,
greedy
,
math
1100
x16903
1741C
Minimize the Thickness
brute force
,
greedy
,
math
,
two pointers
1100
x17023
1783B
Matrix of Differences
constructive algorithms
,
math
1100
x17032
1827A
Counting Orders
combinatorics
,
math
,
sortings
,
two pointers
1100
x17060
365A
Good Number
implementation
1100
x17133
1496B
Max and Mex
math
1100
x17140
1015C
Songs Compression
sortings
1100
x17145
1304B
Longest Palindrome
brute force
,
constructive algorithms
,
greedy
,
implementation
,
strings
1100
x17290
1807G2
Subsequence Addition (Hard Version)
bitmasks
,
dp
,
greedy
,
implementation
,
sortings
1100
x17299
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