题解 | #配置文件恢复#

const rl = require('readline').createInterface({
    input:process.stdin
})
// var lines = []
var order = [['reset'],['reset','board'],['board','add'],['board','delete'],['reboot','backplane'],['backplane','abort']]
var output = ['reset what','board fault','where to add','no board at all','impossible','install first','unknown command']
rl.on('line',line=>{
    var input = line.split(' ')
    var match = []
    for(var j=0;j<=order.length-1;j++){
        if(order[j].length===input.length){
            if(input.length===1){
                if(input[0] === order[j][0].slice(0,input[0].length)){
                    match.push(j)
                }
            }else if(input.length===2){
                if(input[0] === order[j][0].slice(0,input[0].length)&&input[1] === order[j][1].slice(0,input[1].length)){
                    match.push(j)
                }
            }
        }
    }
    // console.log(match)
    if(match.length!==1){
        console.log(output[output.length-1])
    }else{
        console.log(output[match[0]])
    }
})