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#!/usr/bin/env ruby
def valof(reg_file, reg_or_int)
if reg_or_int >= 'a' && reg_or_int <= 'z' then
return reg_file[reg_or_int] || 0
end
return reg_or_int.to_i
end
input = $stdin.readlines.map(&:chomp)
reg0 = {"p" => 0}
reg1 = {"p" => 1}
pc0 = 0
pc1 = 0
q0 = []
q1 = []
running0 = true
running1 = true
count = 0
loop do
running0 = false if pc0 < 0 || pc0 >= input.length
running1 = false if pc1 < 0 || pc1 >= input.length
if running0 then
istr = input[pc0].split
case istr[0]
when 'snd'
q1 << valof(reg0, istr[1])
count += 1
when 'set'
reg0[istr[1]] = valof(reg0, istr[2])
when 'add'
reg0[istr[1]] = valof(reg0, istr[1]) + valof(reg0, istr[2])
when 'mul'
reg0[istr[1]] = valof(reg0, istr[1]) * valof(reg0, istr[2])
when 'mod'
reg0[istr[1]] = valof(reg0, istr[1]) % valof(reg0, istr[2])
when 'rcv'
if q0.empty? then
pc0 -= 1
else
reg0[istr[1]] = q0.shift
end
when 'jgz'
if valof(reg0, istr[1]) > 0 then
pc0 += valof(reg0, istr[2])
pc0 -= 1
end
end
pc0 += 1
end
if running1 then
istr = input[pc1].split
case istr[0]
when 'snd'
q0 << valof(reg1, istr[1])
when 'set'
reg1[istr[1]] = valof(reg1, istr[2])
when 'add'
reg1[istr[1]] = valof(reg1, istr[1]) + valof(reg1, istr[2])
when 'mul'
reg1[istr[1]] = valof(reg1, istr[1]) * valof(reg1, istr[2])
when 'mod'
reg1[istr[1]] = valof(reg1, istr[1]) % valof(reg1, istr[2])
when 'rcv'
if q1.empty? then
pc1 -= 1
else
reg1[istr[1]] = q1.shift
end
when 'jgz'
if valof(reg1, istr[1]) > 0 then
pc1 += valof(reg1, istr[2])
pc1 -= 1
end
end
pc1 += 1
end
break if !running0 && !running1
break if input[pc0].split[0] == 'rcv' && q0.empty? && !running1
break if input[pc1].split[0] == 'rcv' && q1.empty? && !running0
break if input[pc0].split[0] == 'rcv' && q0.empty? &&
input[pc1].split[0] == 'rcv' && q1.empty?
end
puts count
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