#include<bits/stdc++.h> #define int long long #define endl '\n' using namespace std; int a[10000]; string s1,s2,s3,s4; signed main(){ int x,y; char f; cin>>x>>y>>f; switch(f){ case'+': cout<<x+y; break; case'-': cout<<x-y; break; case'': cout<<xy; break; case'/': if(y==0){ cout<<"Divided by zero!"; } else{ cout<<x/y; } break; default : cout<<"Invalid operator!"; } return 0; }