#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>

#define int ptrdiff_t
#define div lldiv
#define div_t lldiv_t
#define abs(a) ((a)<0?-(a):(a))

int A,B,S;

int calc(void) {
    if (S == 1 || abs(A-S) <= abs(B-S))
        return abs(A-S) + abs(S-0);
    if (A >= 1 && A < B)
        return abs(B-S) + abs(S-A) + abs(A);
    return abs(B-S) + abs(S-1) + abs(A-1) + abs(1-0);
}

main(){
    int ans = 0;
    scanf("%td%td%td\n", &A,&B,&S);
    printf("%td\n", calc());
    return 0;
}