#include <iostream>
using namespace std;
int main() {
int a, b, c, max1 = 0, max2 = 0;
cin >> a >> b >> c;
if(a != b && a!= c && b != c) {
max1 = max(a, max (b, c));
max2 = (a+b+c)-max(a,max(b,c))-min(a,(b,c));
cout << max2 + max2 + 1;
}
else
if((max2 + max2 + 1) < max1)
{
cout << max1;
}
else
if(a == b && b == c) {
cout << a + b;
}
return 0;
}
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