#include<iostream>
#include<cstdio>
#define endl '\n'
using namespace std;
int n;
int main(){
	freopen("std.in","r",stdin);
	freopen("std.out","w",stdout);
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin>>n;
	cout<<n<<" "<<114514;
	cout<<endl;
	fclose(stdin);
	fclose(stdout);
	return 0;
}

问一下关同步流后还能写 fclose 吗？为什么不输出？