参考https://www.acwing.com/solution/content/12557/
#include<iostream>
using namespace std;
int main()
{
int x, count = 0;
while(cin>>x, x)
{
// if (x==0) break;
for(int i=1;i<=x;i++)
{
cout<<i<<" ";
}
cout<<endl;
}
}