#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main(void)
{
    char s[14],t[7];
    int x,y,i,j;
    scanf("%s",s);
    x=atoi(s);
    for(i=1;;i++)if(s[i]=='+'||s[i]=='-')break;
    for(j=i+1;j<strlen(s);j++)t[j-i-1]=s[j];
    t[j-i+1]='\0';
    y=atoi(t);
    if(s[i]=='+')printf("%d",x-y);
    else printf("%d",x+y);
    return 0;
}