ans

#include<iostream>
using namespace std;
int a,b;
char c;
int main(){
    cin>>a>>b>>c;
    if(c=='+')
    {
        cout<<a+b<<endl;
        return 0;
    }
    else if(c=='-')
    {
        cout<<a-b<<endl;
        return 0;
    }
    else if(c=='*')
    {
        cout<<a*b<<endl;
        return 0;
    }
    else if(c=='/'&&b!=0)
    {
        cout<<a/b<<endl;
        return 0;
    }
    
    else if(c!='+'&&c!='-'&&c!='*'&&c!='/')
    {
        cout<<"Invalid operator!"<<endl;
        return 0;
    }
    else cout<<"Divided by zero!"<<endl;
    return 0;
}