/*#include <stdio.h>
int main()
{
int n,i;
scanf("%d",&n);
for(i=1;i<=n;i++)
{
printf("%d\n",i);
}
return 0;
}
#include<stdio.h>
int main()
{
int e,r,n,i,sum=0;
scanf("%d %d %d",&e,&r,&n);
sum=e;
for(i=1;i<=n-1;i++)
{
sum=sum+r;
}
printf("%d",sum);
return 0;
}
i=i+1 i++
i=i-1 i--
i=i+2 i+=2
sum=sum+0.01
sum+=0.01
#include<stdio.h>
int main()
{
double a,b,i,sum;
scanf("%lf %lf",&a,&b);
for(i=a;i<=b;i+=0.01)
{
printf("%.2lf ",i);
}
return 0;
}
#include<stdio.h>
int main()
{
int e,r,t,y,i;
long long int sum=0;
scanf("%d %d %d %d",&e,&r,&t,&y);
sum=e;
for(i=1;i<=y-1;i++)
{
sum=sum*r+t;
}
printf("%lld",sum);
return 0;
}
*/
/*
#include<stdio.h>
int main()
{
int n;
scanf("%d", &n);
while(n!=0)
{
printf("%d", n);
n=n-1; //n--;와 같다.
}
return 0;
}
#include<stdio.h>
int main()
{
int n;
scanf("%d",&n);
while(n!=0)
{
printf("%d\n",n);
n=n-1;
}
return 0;
}
#include<stdio.h>
int main()
{
int n,i;
scanf("%d",&n);
i=0;
while(i<=n)
{
printf("%d\n",i);
i=i+1;
}
return 0;
}
#include<stdio.h>
int main()
{
int i,n;
/ scanf("%d",&n);
* i=1;
while(i<=n)
{
if(i%3!=0)
{
printf("%d ",i);
}
i=i+1;
}
return 0;
}
*/
#include<stdio.h>
int main()
{
int n,i;
scanf("%d",&n);
while(n/2)
{
}
printf("%d",);
}