Paul Rubin ha scritto:
superpollo <ute...@esempio.net> writes:goal (from e.c.m.): evaluate 1^2+2^2+3^2-4^2-5^2+6^2+7^2+8^2-9^2-10^2+...-2010^2, where each three consecutive + must be followed by two - (^ meaning ** in this context)print sum([-1,1,1,1,-1][i%5]*i**2 for i in xrange(1,2011))
beautiful. thx -- http://mail.python.org/mailman/listinfo/python-list
