#include <bits/stdc++.h>
using namespace std;
int main()
{
int a,b;
char c;//加/减/乘/除
cin>>a>>c>>b;
if(c=='+')
cout<<a+b;
else if(c=='-')
cout<<a-b;
else if(c=='*')
cout<<a*b;
else if(c=='/')
cout<<a/b;
else if(c=='%')
printf("%.2f",double(a%b));
/*二选一用
int a,b;
char op;
cin>>a>>op>>b;
switch(op)
{
case'+':
cout<<a+b<<endl; break;
case'-':
cout<<a-b<<endl; break;
case'*':
cout<<a*b<<endl; break;
case'/':
cout<<a/b<<endl; break;
}
*/
return 0;
}

*#include<iostream>
using namespace std;

int Add(int a,int b);

int main()
{
int a,b,c;
cin>>a>>b;
c=Add(a,b);
cout<<c<<endl;
}

int Add(int a,int b)
{
int c=a+b;
return c;
}***

#include <iostream>
#include <cmath>
using namespace std;

int main()
{
int x1,x2;
char op;
cin>>x1>>op>>x2;

switch(op)

{
case '+': cout<<x1+x2<<endl; break;
case '-': cout<<x1-x2<<endl; break;
case '*': cout<<x1*x2<<endl; break;
case '/': cout<<x1/x2<<endl; break;
}

return 0;
}