#ifndef MYMACRO_H
#define MYMACRO_H
#define BLOCK_LOW(id,p,n)  ((id)*(n)/(p))
#define BLOCK_HIGH(id,p,n) (BLOCK_LOW((id)+1,p,n)-1)
#define BLOCK_SIZE(id,p,n) (BLOCK_HIGH(id,p,n) - BLOCK_LOW(id,p,n) + 1)
#define BLOCK_OWNER(index,p,n) (((p)*((index) + 1) - 1)/(n))
#endif