AtCoder ABC #042 [Ruby]

abc042-a.rb

a, b, c = gets.chomp.split(" ")
if ((a == "5") && (b == "5") && (c == "7")) || ((a == "7") && (b == "5") && (c == "5")) || ((a == "5") && (b == "7") && (c == "5")) then
  puts "YES"
else
  puts "NO"
end

abc042-b.rb

n, l = gets.chomp.split(" ").map(&:to_i)
ss = []
n.times do
  ss << gets.chomp
end
puts ss.sort.join("")

abc042-c.rb

n, k = gets.chomp.split(" ").map(&:to_i)
d = gets.chomp.split(" ")
re = Regexp.union(d)
while true
  if n.to_s.match(re) then
    n += 1
  else
    puts n
    exit
  end
end