#include <stdio.h>
int main() {
int a, b, c;
scanf("%d %d %d", &a, &b, &c);
if(a==b&&b==c) printf("%d\n", 3*a);
else if(a>b && a>c) printf("%d\n", (b+c)*2-1);
else if(b>a && b>c) printf("%d\n", (a+c)*2-1);
else printf("%d\n", (a+b)*2-1);
return 0;
}
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