#include<stdio.h>
int main()
{
  int a,b,c;
  char sign;
  scanf("%d%c%d",&a,&sign,&b);
  if(sign=='+')
  {
  c=a+b;
  }
  else if(sign=='-')
  {
  c=a-b;
  }

printf("%d\n",c);






return 0;
}







