#include<stdio.h>
int main()
{
	long long a,b;
	char c;
	long long op(long long a,long long b,char c);
	scanf("%lld %c %lld",&a,&c,&b);
	op(a,b,c);
	printf("%lld",op(a,b,c));
	return 0;
}
long long op(long long a ,long long b ,char c )
{
	int sum=0;
	if(c=='+')sum = a+b;
    if(c=='-') sum = a+(-b);
	return(sum);
}