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

int max(int a, int b, int c)
{
    int tmp;
    tmp = a > b ? a : b;

    return tmp > c ? tmp : c;
}

int min(int a, int b, int c)
{
    int tmp;
    tmp = a < b ? a : b;

    return tmp < c ? tmp : c;
}

int dist(int a, int b, int c)
{
    return max(a, b, c) - min(a, b, c);
}

int main()
{
    int a = 3, b = 5, c = 10;

    printf("result = %d\n", dist(a, b, c));

    exit(0);
}