#include <stdio.h>
inline void scanint(long long *x)
{
	register char c = getchar_unlocked();
	*x = 0;
	for(; (c<48)||(c>57);c = getchar_unlocked());
	for(; (c>47)&&(c<58);c = getchar_unlocked())
		*x = (int)((((*x)<<1) + ((*x)<<3)) + c - 48);
}

inline void printint(long long n)
{
	if(n == 0)
	{
		putchar_unlocked('0');
		putchar_unlocked('\n');
	}
	else if(n == -1)
	{
		putchar_unlocked('-');
		putchar_unlocked('1');
		putchar_unlocked('\n');
	}
	else
	{
		char buf[11];
		buf[10] = '\n';
		int i = 9;
		while(n)
		{
			buf[i--] = n % 10 + '0';
			n /= 10;
		}
		while(buf[i] != '\n')
			putchar_unlocked(buf[++i]);
	}
}
int main(void) 
{
	long long x;
	scanint(&x);
	printint(x);
	return 0;
}