HDU 5523 Game

#include<cstdio>
#include<cstring>
#include<cmath>
#include<algorithm>
using namespace std;

int main()
{
    int N,S,T;
    while(~scanf("%d%d%d",&N,&S,&T))
    {
        if((S==1&&T==N)||(S==N&&T==1))
        {
            printf("0\n");
            continue;
        }
        
        if(S==T)
        {
            printf("-1\n");
            continue;
        }
        
        if((1<S&&S<T&&T<N)||(1<T&&T<S&&S<N))
        {

            if(abs(S-T)==1)
            {
                printf("1\n");
                continue;
            }
            else if(abs(S-T)!=1)
            {
                printf("2\n");
                continue;
            }
        }

        if(S==1||S==N)
        {
            printf("1\n");
            continue;
        }

        if(T==1||T==N)
        {
            if(abs(T-S)==1) printf("1\n");
            else printf("2\n");
            continue;
        }
    }
    return 0;
}