#include <iostream>

using namespace std;

int main()

{

int a,b;

char c;

cin>>a>>c>>b;

if(c=='+'){

int d=a+b;

cout<<d<<endl;

}else{

int e=a-b;

cout<<e<<endl;

}

return 0;

}

#include <stdio.h>

int main(){
	int n,m;
	char f;
	scanf("%d%c%d",&n,&f,&m);
	if(f=='+')
	printf("%d",n+m);
	else{
		printf("%d",n-m);
	}
	
	return 0;
}