-#define MIN(a,b) ((a) < (b) ? (a) : (b))
-#define MAX(a,b) ((a) > (b) ? (a) : (b))
-#define ABS(a) ((a) > 0 ? (a) : -(a))
+#define PARA_MIN(a,b) ((a) < (b) ? (a) : (b))
+#define PARA_MAX(a,b) ((a) > (b) ? (a) : (b))
+#define PARA_ABS(a) ((a) > 0 ? (a) : -(a))