int disorder(int *start, int edge){
   int dis = 0;
   int i;
   int j;
   for (i = 0; i < edge*edge; i++){
      if (start[i] == 'b'){
         dis+= i%edge;
      } else {
         for (j = i; j < edge*edge; j++){
             if (start[j] == 'b'){

            } else if (start[i] < start[j]){
               dis++;
            }
         }
      }
   }
   return dis;
}