#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>

int main() {

    /* Enter your code here. Read input from STDIN. Print output to STDOUT */    
    unsigned int a,b,c;
    scanf("%d %d",&a,&b);
    if(a>b)
    c=a-b;
    else
        c=b-a;
    if(b>1)
        {
        c=c+b-1;
    }
    printf("%d",c);
    return 0;
}