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