sum.rb

def parse_arg(arg)
  a, b, q = arg.split(' ').map(&:to_i)
  [Range.new(a, b), q]
end

inputs = []

while arg = STDIN.gets 
  inputs << parse_arg(arg)
end

# Drop the first line
input.shift 

acc = Hash.new { |h, k|, h[k] = [] }

inputs.each do |r, q|
  r.each { |i| acc[i] << q }
end

acc.values.map(&:sum).max