#include
int main(){
int a, b, res;
char c;
scanf("%d%c%d",&a,&c,&b);
switch(c){
case '+':
printf("%d",a+b);
break;
case '-':
printf("%d",a-b);
break;
case '*':
printf("%d",a*b);
break;
case'/':
if(b!=0)
printf("%d",a/b);
else
printf("除数不能为0!\n");
break;
}
return 0;
}