#include<iostream>
#include<stdio.h>
#include<string.h>
#include<math.h>
using namespace std;
int main()
{
	int num[11] = { 0 };
	char ch;
	int i = 1;
	int len = 0;
	int t=0;
	while ((ch = getchar()) != '\n')
	{
		if (ch != '-')
		{
			len++;
			num[i] = ch - '0';
			i++;
		}
		else
			t++;
	}
	int n = 0;
	for (i = 1; i <= len; i++)
		n = n + num[i] * pow(10, i-1);
	if(t==0)
	cout << n;
	else
	cout << -n;
	
}