text: #include <bits/stdc++.h>
  #define FOR(i,a,b)  for(int (i)=(a);(i)<(b);(i)++)
  #define REP(i,n)    FOR(i,0,n)
  #define RER(i,n)    FOR(i,0,(n+1))
  #define pb          push_back
  #define mp(a,b)     make_pair((a),(b))
  #define mset(m,v)   memset(m,v,sizeof(m))
  using namespace std;
  typedef vector<int> vi;
  typedef pair<int, int> pii;
  typedef vector<pair<int, int> > vpii;
  typedef long long ll;
  typedef vector<ll> vl;
  typedef pair<ll,ll> pll;
  typedef vector<pair<ll, ll> > vpll;
  typedef vector<string> vs;
  typedef long double ld;
  const double EPS    = 1e-10;
  const int INF       = 1e+9;
  const double PI     = acos(-1);
  
  
  auto main() -> int
  {
      int a, b;
      char op;
      cin >> a >> op >> b;
  
      cout << ((op == '+') ? a + b : a - b) << endl;
  
      return 0;
  }
  
  