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Codeforces Round 937 (Div. 4)
05:56:52
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Difficulty:
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number theory
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
735B
Urbanization
greedy
,
number theory
,
sortings
1100
x8169
858A
k-rounding
brute force
,
math
,
number theory
1100
x7809
68A
Irrational problem
implementation
,
number theory
1100
x4782
1364A
XXXXX
brute force
,
data structures
,
number theory
,
two pointers
1200
x26553
1541B
Pleasant Pairs
brute force
,
implementation
,
math
,
number theory
1200
x26046
1409C
Yet Another Array Restoration
brute force
,
math
,
number theory
1200
x22628
1487B
Cat Cycle
math
,
number theory
1200
x19345
776B
Sherlock and his girlfriend
constructive algorithms
,
number theory
1200
x18916
1656C
Make Equal With Mod
constructive algorithms
,
math
,
number theory
,
sortings
1200
x18281
1925B
A Balanced Problemset?
brute force
,
greedy
,
math
,
number theory
1200
x17656
1736B
Playing with GCD
math
,
number theory
1200
x16997
1933D
Turtle Tenacity: Continual Mods
constructive algorithms
,
greedy
,
math
,
number theory
,
sortings
1200
x16693
456B
Fedya and Maths
math
,
number theory
1200
x15873
1277B
Make Them Odd
greedy
,
number theory
1200
x14466
1149A
Prefix Sum Primes
constructive algorithms
,
greedy
,
math
,
number theory
1200
x14449
1909B
Make Almost Equal With Mod
bitmasks
,
constructive algorithms
,
math
,
number theory
1200
x13080
1076B
Divisor Subtraction
implementation
,
math
,
number theory
1200
x12435
1133B
Preparation for International Women's Day
math
,
number theory
1200
x12263
1068B
LCM
math
,
number theory
1200
x10971
787A
The Monster
brute force
,
math
,
number theory
1200
x10889
1877C
Joyboard
math
,
number theory
1200
x9835
1143B
Nirvana
brute force
,
math
,
number theory
1200
x9799
660A
Co-prime Array
greedy
,
implementation
,
math
,
number theory
1200
x8409
361B
Levko and Permutation
constructive algorithms
,
math
,
number theory
1200
x7848
59B
Fortune Telling
implementation
,
number theory
1200
x6591
817A
Treasure Hunt
implementation
,
math
,
number theory
1200
x6030
1184A1
Heidi Learns Hashing (Easy)
brute force
,
math
,
number theory
1200
x5792
177B2
Rectangular Game
number theory
1200
x2810
172B
Pseudorandom Sequence Period
*special problem
,
implementation
,
number theory
1200
x2666
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x68667
1294C
Product of Three Numbers
greedy
,
math
,
number theory
1300
x31636
1360D
Buying Shovels
math
,
number theory
1300
x30262
1372B
Omkar and Last Class of Math
greedy
,
math
,
number theory
1300
x25731
1401C
Mere Array
constructive algorithms
,
math
,
number theory
,
sortings
1300
x23261
1521B
Nastia and a Good Array
constructive algorithms
,
math
,
number theory
1300
x20572
1454D
Number into Sequence
constructive algorithms
,
math
,
number theory
1300
x19562
519C
A and B and Team Training
greedy
,
implementation
,
math
,
number theory
1300
x19251
1850F
We Were Both Children
brute force
,
implementation
,
math
,
number theory
1300
x16656
1407B
Big Vova
brute force
,
greedy
,
math
,
number theory
1300
x16617
1603A
Di-visible Confusion
constructive algorithms
,
math
,
number theory
1300
x15990
573A
Bear and Poker
implementation
,
math
,
number theory
1300
x15976
1931D
Divisible Pairs
combinatorics
,
math
,
number theory
1300
x14970
1881D
Divide and Equalize
math
,
number theory
1300
x13642
236B
Easy Number Challenge
implementation
,
number theory
1300
x13297
1601A
Array Elimination
bitmasks
,
greedy
,
math
,
number theory
1300
x12858
1826C
Dreaming of Freedom
greedy
,
math
,
number theory
1300
x12557
1864C
Divisor Chain
bitmasks
,
constructive algorithms
,
math
,
number theory
1300
x12377
271B
Prime Matrix
binary search
,
brute force
,
math
,
number theory
1300
x12261
1899D
Yarik and Musical Notes
hashing
,
math
,
number theory
1300
x11833
1902C
Insert and Equalize
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1300
x11815
1174C
Ehab and a Special Coloring Problem
constructive algorithms
,
number theory
1300
x11756
1823C
Strongly Composite
greedy
,
math
,
number theory
1300
x11489
1220B
Multiplication Table
math
,
number theory
1300
x11303
912B
New Year's Eve
bitmasks
,
constructive algorithms
,
number theory
1300
x11227
371B
Fox Dividing Cheese
math
,
number theory
1300
x10792
870C
Maximum splitting
dp
,
greedy
,
math
,
number theory
1300
x8923
1155C
Alarm Clocks Everywhere
math
,
number theory
1300
x8884
876B
Divisiblity of Differences
implementation
,
math
,
number theory
1300
x8643
1209B
Koala and Lights
implementation
,
math
,
number theory
1300
x7913
1113B
Sasha and Magnetic Machines
greedy
,
number theory
1300
x7645
900B
Position in Fraction
math
,
number theory
1300
x7598
515B
Drazil and His Happy Friends
brute force
,
dsu
,
meet-in-the-middle
,
number theory
1300
x7344
840A
Leha and Function
combinatorics
,
greedy
,
math
,
number theory
,
sortings
1300
x6940
633B
A Trivial Problem
brute force
,
constructive algorithms
,
math
,
number theory
1300
x6496
158D
Ice Sculptures
*special problem
,
brute force
,
number theory
1300
x6162
123A
Prime Permutation
implementation
,
number theory
,
strings
1300
x3499
1526B
I Hate 1111
dp
,
math
,
number theory
1400
x28194
1370C
Number Game
games
,
math
,
number theory
1400
x23333
1285C
Fadi and LCM
brute force
,
math
,
number theory
1400
x21627
414B
Mashmokh and ACM
combinatorics
,
dp
,
number theory
1400
x20268
1350B
Orac and Models
dp
,
math
,
number theory
1400
x20225
762A
k-th divisor
math
,
number theory
1400
x17658
1332B
Composite Coloring
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1400
x16947
1462D
Add to Neighbour and Remove
greedy
,
math
,
number theory
1400
x16088
1519C
Berland Regional
brute force
,
data structures
,
greedy
,
number theory
,
sortings
1400
x15704
1312C
Adding Powers
bitmasks
,
greedy
,
implementation
,
math
,
number theory
,
ternary search
1400
x15687
1714E
Add Modulo 10
brute force
,
math
,
number theory
1400
x14920
1627C
Not Assigning
constructive algorithms
,
dfs and similar
,
number theory
,
trees
1400
x13892
1606C
Banknotes
greedy
,
number theory
1400
x13604
1263C
Everyone is a Winner!
binary search
,
math
,
meet-in-the-middle
,
number theory
1400
x13232
1838C
No Prime Differences
constructive algorithms
,
math
,
number theory
1400
x13205
1758C
Almost All Multiples
greedy
,
number theory
1400
x12716
1759D
Make It Round
brute force
,
number theory
1400
x11727
1844D
Row Major
constructive algorithms
,
greedy
,
math
,
number theory
,
strings
1400
x11443
1875C
Jellyfish and Green Apple
bitmasks
,
greedy
,
math
,
number theory
1400
x10521
757B
Bash's Big Day
greedy
,
math
,
number theory
1400
x9710
1091C
New Year and the Sphere Transmission
math
,
number theory
1400
x9597
1200C
Round Corridor
math
,
number theory
1400
x9563
1609C
Complex Market Analysis
binary search
,
dp
,
implementation
,
number theory
,
schedules
,
two pointers
1400
x9401
1266C
Diverse Matrix
constructive algorithms
,
greedy
,
math
,
number theory
1400
x9273
337B
Routine Problem
greedy
,
math
,
number theory
1400
x9034
150A
Win or Freeze
games
,
math
,
number theory
1400
x7524
1866B
Battling with Numbers
combinatorics
,
math
,
number theory
1400
x7076
937B
Vile Grasshoppers
brute force
,
math
,
number theory
1400
x6773
284A
Cows and Primitive Roots
implementation
,
math
,
number theory
1400
x6339
248B
Chilly Willy
math
,
number theory
1400
x5163
1542B
Plus and Multiply
constructive algorithms
,
math
,
number theory
1500
x21755
1538F
Interesting Function
binary search
,
dp
,
math
,
number theory
1500
x18086
1487D
Pythagorean Triples
binary search
,
brute force
,
math
,
number theory
1500
x16745
1397B
Power Sequence
brute force
,
math
,
number theory
,
sortings
1500
x14265
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