#include <stdio.h>
#define get getchar_unlocked

inline void scand(int* i)
{
	int n=0,p=get();
	while( p >= '0' && p <= '9') {
		n = (n<<3) + (n<<1) + p-'0' ,p=get();
	}
	if(p == '\n' || p == EOF)
	*i = n;
	return ;
}
int main()
{
	int i;
	scand(&i);
	printf("%d\n",i);
	return 0;
}