https://paiza.jp/poh/enkoi

enkoi-second.rb

#!/usr/bin/env ruby
input_lines = ARGF
first = true
sum = 0
input_lines.each_line do |line|
    if first then
        first = false
        next
    end
    t, s, p = (line.split ' ').map {|s| s.to_i}
    if not t <= s then
        sum += (t - s) * p
    end
end
puts sum

enkoi-third.rb

#!/usr/bin/env ruby
#

input_lines = ARGF.read
t = 0
n = 0
m = []

first = true
input_lines.each_line do |line|
  if first then
    first = false
    t, n = (line.split ' ').map {|s| s.to_i}
    next
  end
  m << line.strip.to_i
end

max = 0
m.each_cons(t) do |ms|
  v = ms.inject(:+)
  if max < v then
    max = v
  end
end
puts max