#include <bits/stdc++.h>
using namespace std;
int main() {
  long long int a, b, d, p, q, s, t, r;
  cin >> a >> b >> d;
  p = a + a + b + b;
  q = a + d + b;
  s = a + d + d + a;
  t = b + d + d + b;
  r = min(p, min(q, min(s, t)));
  cout << r << endl;
  return 0;
}
