#include <bits/stdc++.h>
using namespace std;
int main() {
  std::ios::sync_with_stdio(false);
  std::cin.tie(0);
  int a, b, c;
  cin >> a >> b >> c;
  int s = 0;
  int min = a < b ? a : b;
  int max = a > b ? a : b;
  s += min;
  if (c > (max + min))
    s += (max + min);
  else
    s += c;
  if ((c + min) < max)
    s += c + min;
  else
    s += max;
  cout << s << endl;
}
