#include<iostream>
#include<vector>
using namespace std;
#define MAX 100000
bool v[MAX];
void pre()
{
for(int i=2;i<MAX;i++)v[i]=true;
for(int i=2;i<MAX;i++)
{
if(v[i])
for(int j=i;j*i<MAX;j++)
v[j*i]=false;
}
}
int main()
{
pre();
int i;
cin>>i;
cout<<i;
return 0;
}
I2luY2x1ZGU8aW9zdHJlYW0+CiNpbmNsdWRlPHZlY3Rvcj4KdXNpbmcgbmFtZXNwYWNlIHN0ZDsKI2RlZmluZSBNQVggMTAwMDAwCmJvb2wgdltNQVhdOwp2b2lkIHByZSgpCnsKCQoJZm9yKGludCBpPTI7aTxNQVg7aSsrKXZbaV09dHJ1ZTsKCWZvcihpbnQgaT0yO2k8TUFYO2krKykKCXsKCQlpZih2W2ldKQoJCWZvcihpbnQgaj1pO2oqaTxNQVg7aisrKQoJCXZbaippXT1mYWxzZTsKCX0KfQppbnQgbWFpbigpCnsKCXByZSgpOwoJaW50IGk7CiAgICBjaW4+Pmk7CiAgICBjb3V0PDxpOwoJcmV0dXJuIDA7Cn0=