#include <bits/stdc++.h> using namespace std; int main(){ char a,b,c; cin>>a>>b>>c; switch (b){ case 43 : cout<<a+c-96; break; case 45 : cout<<a-c-96; case 42 : cout<<(a-48)*(c-48); break; case 47 : cout<<(a-48)/(c-48); break; } }