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Help us understand the problem. What are the problem?

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会津オンラインジャッジ解答

while input = gets
  n = input.chomp.to_i;
  if n>=1 && n<=999999
    for i in 2..n-1 do
      if n % i != 0
        if i == n-1
          puts n;
        end
        next;
      else
        break;
      end
    end
  else
    break;
  end
end

input_lines = readlines;
num = input_lines.length;
data_set = Array.new(num);

for i in 0..num-1
  data_set = input_lines[i].chomp.split(" ");
  a = data_set[0].to_f.round(4);
  b = data_set[1].to_f.round(4);
  c = data_set[2].to_f.round(4);
  d = data_set[3].to_f.round(4);
  e = data_set[4].to_f.round(4);
  f = data_set[5].to_f.round(4);

  y = (c-a*f/d)/(b-a*e/d);
  x = (c-b*y)/a;
  print x.floor;
  print " ";
  print y.floor;
  print "\n"
end

# Card Game
# 1回目
input = gets
n = input.chomp.to_i
sumA = 0;
sumB = 0;
while s = gets
  a,b = s.split(" ").map(&:to_i)
  a != b ? a > b ? sumA += (a+b) : sumB += (a+b) : (sumA += a && sumB += b)
end
puts sumA.to_s + ' ' + sumB.to_s

# 2回目
input = gets
n = input.chomp.to_i
sumA = 0;
sumB = 0;
n.times do
  a,b = gets.split(" ").map(&:to_i)
  a >= b ? a > b ? sumA += (a+b) : (sumA += a && sumB += b) : sumB += (a+b)
end
puts sumA.to_s + ' ' + sumB.to_s

# 3回目
loop{
  input = gets
  n = input.chomp.to_i
  break if n == 0
  sumA = sumB = 0;
  n.times do
    a,b = gets.split(" ").map(&:to_i)
    a >= b ? a > b ? sumA += (a+b) : (sumA += a && sumB += b) : sumB += (a+b)
  end
  puts "#{sumA} #{sumB}"
}

# 4回目
loop{
  input = gets
  n = input.chomp.to_i
  break if n == 0
  sumA = sumB = 0;
  n.times do |i|
    a,b = gets.split(" ").map(&:to_i)
    a >= b ? a > b ? sumA += (a+b) : (sumA += a && sumB += b) : sumB += (a+b)
  end
  puts [sumA, sumB].join(" ")
}


# Data Conversion
# 1回目
output = []
loop{
  n = gets.chomp.to_i
  break if n == 0
  a = b = Array.new(n)
  n.times do |i|
    a[i],b[i] = gets.chomp.split(" ")
  end

  m = gets.chomp.to_i
  m.times do |j|
    c = gets.chomp
    index = a.index(c) && output.push(b[:index]) if a.include?(c)
  end
}
puts output.join


# 2回目
loop{
  n = gets.chomp.to_i
  break if n == 0
  hash = {}
  n.times do
    c0,c1 = gets.chomp.split(" ")
    hash[c0] = c1
  end

  m = gets.chomp.to_i

  input = ''
  output = ''

  m.times do
    c0 = gets.chomp
    c1 = hash[c0]
    input += c0
    output += c1.nil? ? c0 : c1
  end
  puts output
}
Cup
# 1回目
loop{
  n, m = gets.chpmp.split(" ").map(&:to_i)
  a
  n.times do |i|
    gets != "0" ? A = gets.chomp.split(" ").map(&:to_i) : A = 0
    gets != "0" ? B = gets.chomp.split(" ").map(&:to_i) : B = 0
    gets != "0" ? C = gets.chomp.split(" ").map(&:to_i) : C = 0
    A.shift
    B.shift
    C.shift


  end
 }
Dice.rb
loop{
  n = gets.chomp.to_i
  break if n == 0
  # hash = { "上": 1, "手前": 2, "右": 3, "左": 4, "奥": 5, "下": 6 }
  ary = [1, 2, 3, 4, 5, 6]
  sum = 1
  n.times do
    houkou = gets.chomp
    if houkou == "North"
      ary[0], ary[5] = ary[5], ary[0]
      ary[0], ary[1] = ary[1], ary[0]
      ary[4], ary[5] = ary[5], ary[4]
      sum += ary[0]
    elsif houkou == "East"
      ary[0], ary[2] = ary[2], ary[0]
      ary[3], ary[5] = ary[5], ary[3]
      ary[0], ary[5] = ary[5], ary[0]
      sum += ary[0]
    elsif houkou == "West"
      ary[0], ary[2] = ary[2], ary[0]
      ary[3], ary[5] = ary[5], ary[3]
      ary[2], ary[3] = ary[3], ary[2]
      sum += ary[0]
    elsif houkou == "South"
      ary[0], ary[1] = ary[1], ary[0]
      ary[4], ary[5] = ary[5], ary[4]
      ary[0], ary[5] = ary[5], ary[0]
      sum += ary[0]
    elsif houkou == "Right"
      ary[1], ary[2] = ary[2], ary[1]
      ary[3], ary[4] = ary[4], ary[3]
      ary[2], ary[3] = ary[3], ary[2]
      sum += ary[0]
    else
      ary[1], ary[2] = ary[2], ary[1]
      ary[3], ary[4] = ary[4], ary[3]
      ary[1], ary[4] = ary[4], ary[1]
      sum += ary[0]
    end
  end
  puts sum
}

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Help us understand the problem. What are the problem?