import java.util.Scanner;public class test7 {	public static void main(String[] args) {		// TODO Auto-generated method stub				Scanner in=new Scanner(System.in);		String a=in.next();		char b[]=a.toCharArray();		System.out.println(chartoint(b));			}		public static int chartoint(char a[]) {		int str=0;int value=0;int v=1;		if (a==null) {			return 0;		}		if ( a[0]=='-' || a[0]=='+') {			str++;			v=(a[0]=='-'?-1:1);		}		for (int i = str; i < a.length; i++) {			if (a[i]>='0' && a[i]<='9') {								value=value*10+a[i]-'0';			}					}				return v*value;			}	}