#include <iostream>
using namespace std;
int main()
{ char a;
int *z; z=new int [10];
int x,b,c;
while(cin>>a)
{ switch(a)
{
case('z'):
{
cin>>x>>z[x];
break;
}
case('*'):
{
cin>>b>>c;
cout<<z[b]*z[c]<<endl;
break;
}
case('/'):
{
cin>>b>>c;
cout<<z[b]/z[c]<<endl;
break;
}
case('+'):
{
cin>>b>>c;
cout<<z[b]+z[c]<<endl;
break;
}
case('-'):
{
cin>>b>>c;
cout<<z[b]-z[c]<<endl;
break;
}}
}
delete [] z;
return 0;
}
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