What is specific in test 8.
Rather simple problem on Gauss in field {0,1,2,3,4,5,6}
but WA 8.
May be tricks in input?

Soon after message I have understood my mistake:
"crazy" must be repeted to end of input but I
interrupted output on this sentenses.
By the way, after these troubles I am first
in raiting of 1561 due
to array
char add1[7][7]={
    {0,1,2,3,4,5,6},
    {1,2,3,4,5,6,0},
    {2,3,4,5,6,0,1},
    {3,4,5,6,0,1,2},
    {4,5,6,0,1,2,3},
    {5,6,0,1,2,3,4},
    {6,0,1,2,3,4,5}
};
for addition and similar other arrays.