#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <cstdio>
#include <math.h>
#include <string>
#include <algorithm>
using namespace std;
int a, b, c;
int main() {
scanf("%d %d %d", &a, &b, &c);
int len1 = a + a + b + b;
int len2 = a + c + c + a;
int len4 = b + c + c + b;
int len3 = a + b + c;
printf("%d\n", min(min(min(len1, len2), len3), len4));
return 0;
}