#include<bits/stdc++.h> using namespace std; int main() { int a,b,c; char y; cin>>a>>b>>y; c=int(y); if(b!=0) { if(c==43) cout<<a+b; if(c==45) cout<<a-b; if(c==42) cout<<a*b; if(c==47) cout<<a/b; if(c!=43&&c!=45&&c!=42&&c!=47) cout<<"Invalid operator!"; } else cout<<"Divided by zero!"; }