#include <iostream>
#include<bits/stdc++.h>
using namespace std;
int main(void) {
int i,n,a,c,b,m,mx,j;
cin>>a>>b>>c;
i=min(a,b);
j=(i!=a)?a:b;
m=2*(i+j);
mx=i+j+c;
cout<<max(m,mx);
return 0;
}
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