#include <stdio.h>

#define max(x,y,z) ((x)>(y)?(x):(y))>(z)?((x)>(y)?(x):(y)):(z)

#define min(x,y,z) ((x)<(y)?(x):(y))<(z)?((x)<(y)?(x):(y)):(z)

int main(void)

{

    unsigned int a,b;

    a = min(3,1,6);

    b = max(6,7,8);

    printf("a=%d\n",a);

    printf("b=%d\n",b);

    return 0;

}