#include <stdio.h>

int main(void)
{
	int a, b;

	scanf("%d %d", &a, &b);
	
	if (a < b)
		printf("%d\n", a * 2);
	else if (a > b)
		printf("%d\n", b * 2);
	else
		printf("%d\n", a * 2 - 1);

	return 0;
}