aoc 2020 day 8

08.rb

def f idx
code = read.lines.map{|x|
    a,b = x.split
    [a,b.to_i]
}

return if code[idx][0] == 'acc'
code[idx][0] = code[idx][0] == 'jmp' ? 'nop' : 'jmp'

executed = code.map{false}

i = 0
acc = 0
loop {
    if i == code.length
        puts acc
        exit
    end
    if executed[i]
        return
    end
    executed[i] = true
    case code[i][0]
    when 'acc' then acc += code[i][1]; i += 1
    when 'jmp' then i += code[i][1]
    when 'nop' then i += 1
    end
}
end



read.lines.map.with_index{|_,i| f i}