//because the actual code is complex, so the following pseudo code
Struct chess
{
Int the from;
Int to;
Int arr.
The int value.
}
MultisetChess ch;
For some conditions
For some conditions
Ch. The from=a value;
Ch. To=a value;
ch.value=https://bbs.csdn.net/topics/some value;
Ch. Arr=a value;
Che. Insert (ch);
End for
End for

As the title stated when I was inserted into the ninth element eight elements can have several changes before I don't know why, specific debug is as follows:

Insert the ninth element before

After inserting the ninth element