#include <stdio.h>

int maxodd(int a, int b, int c)
{
	if (a%2==1)
   		return a;
   		
   	if (b%2==1)
   		return b;
   		
   	if (c%2==1)
   		return c;
   		
     
   if((a<b)&&(c<a))
    return a;
   else if ((a<b)&&(c<b))
    return b;
   else 
    return c;
   		
   	
}

int main(void) {
	int a,b,c;
	
	scanf("%d",&a);
	scanf("%d",&b);
	scanf("%d",&c);
	printf("%d",maxodd(a,b,c));
	
	// your code goes here
	return 0;
}