I cannot read Chinese, so I couldn't understand what you're discussing in this thread.
I translated this page with google translation and now I've found out that 
MAXIMUM NUMBER OF DIFFERENT TYPES OF STAMPS ISSUED AT ANY TIME IS ** NOT ** TWENTY-FIVE.
If you get repetitive WA, forget this limitation.

in my code,
#define MAX 25

.. 

typedef struct __stamps__ {

	int type[MAX];

	......
} STAMPS;

... 

I only changed 25 -> 65 and I got AC.