for "https://paiza.jp/poh/enshura"

enshura

https://paiza.jp/poh/enshura

q1.rb

puts gets.chars.each.with_index.select{|c, i| i.even?}.map(&:first).join

q2.rb

rsl = [0,0,0,0,0,0,0]
gets.to_i.times do |i|
  break unless str = gets
  rsl[i % 7] += str.to_i
end
puts rsl.join("\n")

q3-minami.rb

w, h = gets.split(' ').map(&:to_i)

counts = Hash.new(0)
h.times do
  nums = gets.split(' ').map(&:to_i)
  nums.each.with_index(1) do |n, i|
    next unless n == 1
    counts[i] += 1
  end
end

h.times do |i|
  list = []
  (1..w).each do |x|
    list << (counts[x] >= (h-i) ? 1 : 0)
  end
  puts list.join(' ')
end

q3-rena.rb

w, h, n = gets.split(' ').map(&:to_i)

table = []
h.times do
  gets.split(' ').map(&:to_i).each{|n| table << n}
end

all = 0
n.times do
  sx, sy, ex, ey = gets.split(' ').map(&:to_i)
  (sy..ey).each do |y|
    break if y > h
    (sx..ex).each do |x|
      break if x > w
      ind = w * (y-1) + (x-1)
      all += table[ind]
      table[ind] = 0
    end
  end
end
puts all

レナルート： https://paiza.jp/poh/enshura-rena-ending/5db8bd8c

ミナミルート： https://paiza.jp/poh/enshura-minami-ending/75addc18