其实一边输入一边输出就行了？
by only__one @ 2023-08-15 08:08:42
@[JungleiRim](/user/534940) 洛谷用的是文件，当读取返回eof时说明输入完毕
by zqy729 @ 2023-08-15 08:08:54
没问题
by Henry2012 @ 2023-08-15 08:09:28
用while里面套cin/scanf
by only__one @ 2023-08-15 08:10:17
`while(cin>>x)` | `while(~scanf("%d",&x))`?
by Greenzhe @ 2023-08-15 08:10:53
@[JungleiRim](/user/534940) 像```scanf```，当它成功读取时，返回读取的元素个数；反之，当到达文件尾时，返回```eof```并抛出错误
by zqy729 @ 2023-08-15 08:11:41
@[zqy729](/user/498117) orz，懂了
by JungleiRim @ 2023-08-15 09:49:12