#include<stdio.h>
int main(){
    char ch;
    int flag=0,sgn=1;
    long sum=0;
    ch=getchar();
    while(ch!='#'){
        if(ch=='-'&&flag==0) sgn=-1;
        else if(ch>='0'&&ch<='9') {
            sum=sum*16+ch-'0';
            flag=1;
        }
        else if(ch>='a'&&ch<='f') {
            sum=sum*16+ch-'a'+10;
            flag=1;
        }
        else if(ch>='A'&&ch<='F') {
            sum=sum*16+ch-'A'+10;
            flag=1;
        }
        ch=getchar();
    }
    printf("%d",sum*sgn);
    return 0;
}