#include<bits/stdc++.h> using namespace std; const int N=1e3+10; const int INF=0x3f3f3f3f; int a,b; char c; int main() { cin>>a>>c>>b; switch(c) { case '+': cout<<a+b; break; case '-': cout<<a-b; break; case '': cout<<ab; } return 0; }