#include <iostream>
 #include <iomanip>
 #include <cmath>
 #include <algorithm>

 using namespace std;
void Rofyda_Elghadban(){
  #ifndef ONLINE_JUDGE
    freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout);
  #endif
}

int main()
 {   Rofyda_Elghadban();
 long long a,b;
 char x;
 cin>>a>>x>>b;
 if('x'=="+"){
     cout<<(a+b)<<"\n";
 }
 else if('x'=="-"){
     cout<<(a-b)<<"\n";
 }
 else if('x'=="*"){
     cout<<(a*b)<<"\n";
 }
 else if('x'=="/"){
     cout<<(a/b)<<"\n";
 }
    return 0;
 }