#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c, s1, s2, s3, s4;
  cin >> a >> b >> c;
  s1 = a + c + b;
  s2 = a + a + b + b;
  s3 = a + c + c + a;
  s4 = b + c + c + b;
  cout << min(s1, (min(s2, min(s3, s4))));
}
