> #include <iostream.h>
> int main(int argc, char *argv[])
> {
>     int n=7,i,t;
>     cin>>n;
>     for(i=2;n>=i;i++) n-=i;
>     i--;//原来多加了一个1
>     if(i==n)
>     {
>         for(t=2;t<=i-1;t++)
>     	{
>     	   cout<<t+1<<" ";
>         }
>         cout<<i+2<<" ";
>     }
>     else
>     {
>         for(t=2;t<=i;t++)
>         {
> 	       if(i-t<n) cout<<t+1<<" ";
> 	       else cout<<t<<" ";
>         }
>     }
>     cout<<endl;
> 	return 0;
> }