def global_parameters(b, c):
 return ((y, ((b[0] - x) - y), x) for (x, y) in zip((b + [0]), ([0] + c)))

def global_parameters ( b , c ) : return ( ( y , ( ( b [ 0 ] - x ) - y ) , x ) for ( x , y ) in zip ( ( b + [ 0 ] ) , ( [ 0 ] + c ) ) )
return global parameters for a given intersection array .