http://www.nowcoder.com/question/next?pid=2385858&qid=46127&tid=4911647 这一题本地测试能通过，上传到OJ一直说返回非0.不知道试了多少种输入输出方式了。 process.stdin.resume(); process.stdin.setEncoding('utf-8'); var input = ""; process.stdin.on('data', function (data) { input += data; }); process.stdin.on('end', function () { var line = input.split("\n"); var ll = line.length; var z = 0; var tokens = line[z].split(" "); var num = tokens[0]; var jj = 2*num + 1; for(var i = 1; i < jj; i = i + 2){ // process.stdout.write(i + '\n'); var result = []; var array = line[z+i].split(" "); var lenlen = array[1]; var aay = line[z+i+1].split(' '); var kk = aa(aay, lenlen); result.push(kk.join(' ')); process.stdout.write(result.join('\n') + '\n'); } }); function aa(arr, k){ var len = arr.length; var lenban = len/2; var arr1 = arr.slice(0, lenban); var arr2 = arr.slice(lenban); var res = []; for (var i = lenban - 1; i >= 0; i--) { res.push(arr2[i]); res.push(arr1[i]); }; k--; res = res.reverse(); if (k > 0) { return arguments.callee(res, k); } else { return res; } }