昨天美团输入输出搞晕，感觉已跪，自己写了一个，给的测试样例是对的，想请求下楼主有没有什么问题，总觉得很繁琐。 /** * Created by eleven on 2017/8/31. */ var readline = require('readline'); var rl = readline.createInterface({ input: process.stdin, output: process.stdout }); var lines = []; var n,m; var links = [],linkeds = []; rl.on('line', function(line){ lines.push(line); if (lines.length === 1){ n = parseInt(lines[0]); } if(lines.length === n+1){ for(var i = 1; i < n + 1; i++){ links.push(lines[i]); } } if(lines.length === n+2){ m = parseInt(lines[n+1]); } if(lines.length === n+m+2){ for(var j = n + 1; j < n+m+2; j++){ linkeds.push(lines[j]); } for(var k = 0; k < linkeds.length; k++){ var index =links.indexOf(linkeds[k]); if(index > -1){ links.splice(index,1); } } links.sort(); for(var p =0; p < links.length; p++){ console.log(links[p]); } } }); rl.on('close', function() { process.exit(0); });