problem | https://paiza.jp/poh/ec-campaign |
---|---|
Time list/C++ | http://qiita.com/cielavenir/items/a61cfe8390eb16866ae5 |
Python/Ruby(1) | http://qiita.com/cielavenir/items/b10ff4d201150f525062 |
C#/Java/Python/Ruby | http://qiita.com/cielavenir/items/d89e85f069cf570e6786 |
Perl/PHP | http://qiita.com/cielavenir/items/1a650a4c41d7bdd31392 |
JavaScript | http://qiita.com/cielavenir/items/a85b985888fdc15c52b7 |
Go/CoffeeScript/Scala/R/Bash | http://qiita.com/cielavenir/items/79016a0afd30470f440d |
VB/F#/D | http://qiita.com/cielavenir/items/cb6094bab56253de992c |
I ported C ++ No. 3 to Python and Ruby (Is the situation of Python and Ruby arrays different from C (++)? Bucket sorting made it slower).
Python (0.54s) I'm wasting it to work even with 3.3 http://paiza.jp/poh/ec-campaign/result/99a7b5e35cf1bd095e45504931c15635
paizapoh1.py
#!/usr/bin/python
import sys,bisect
if sys.version_info[0]>=3:
raw_input=input
xrange=range
n,d=[int(e,10) for e in raw_input().split()]
v=sorted([int(raw_input(),10) for i in xrange(n)])
for i in xrange(d):
m=int(raw_input())
r=j=0
#k=n-1
k=bisect.bisect_right(v,m-v[0])-1
while j<k and v[j]+v[j+1]<=m:
while v[j]+v[k]>m: k-=1
if r<v[j]+v[k]:
r=v[j]+v[k]
if r==m: break
j+=1
print(r)
Ruby (0.34s) Since paiza's Ruby is 1.9.3, it is quoted from backports gem. If it is 2.0.0, the bsearch part will be in C language, so it will be faster. http://paiza.jp/poh/ec-campaign/result/885ab06217b9e35f56b2baaf8193ba2d
paizapoh1.rb
#!/usr/bin/ruby
#https://github.com/marcandre/backports/blob/master/lib/backports/2.0.0/range/bsearch.rb
unless Range.method_defined? :bsearch
class Range
def bsearch
return to_enum(:bsearch) unless block_given?
from = self.begin
to = self.end
unless from.is_a?(Numeric) && to.is_a?(Numeric)
raise TypeError, "can't do binary search for #{from.class}"
end
midpoint = nil
if from.is_a?(Integer) && to.is_a?(Integer)
convert = Proc.new{ midpoint }
else
map = Proc.new do |pk, unpk, nb|
result, = [nb.abs].pack(pk).unpack(unpk)
nb < 0 ? -result : result
end
from = map['D', 'q', to.to_f]
to = map['D', 'q', to.to_f]
convert = Proc.new{ map['q', 'D', midpoint] }
end
to -= 1 if exclude_end?
satisfied = nil
while from <= to do
midpoint = (from + to).div(2)
result = yield(cur = convert.call)
case result
when Numeric
return cur if result == 0
result = result < 0
when true
satisfied = cur
when nil, false
# nothing to do
else
raise TypeError, "wrong argument type #{result.class} (must be numeric, true, false or nil)"
end
if result
to = midpoint - 1
else
from = midpoint + 1
end
end
satisfied
end
end
end
n,d=gets.split.map(&:to_i)
v=n.times.map{gets.to_i}.sort
d.times{
m=gets.to_i
r=j=0
k=((0...v.size).bsearch{|i|m-v[0]<v[i]}||v.size)-1 # upper_bound-1
while j<k&&v[j]+v[j+1]<=m
k-=1 while v[j]+v[k]>m
if r<v[j]+v[k]
r=v[j]+v[k]
break if r==m
end
j+=1
end
p r
}