# -*- coding: utf-8 -*- """ @authors: katkaranikola stkarlos """ l = [] for i in range(100,201): if i % 7 == 0: l.append(i) print l, len(l), sum(l) k = [] for i in range(0,len(l)): if l[i]**2 % 2 == 0: k.append(l[i]) print k n = [] for i in range(0,len(l)/2): n.append( l[i] * l[-i-1]) print n even = [] odd = [] for i in range(0, len(l)): if i % 2 == 0: even.append(l[i]) else: odd.append(l[i]) print even, odd, sum(even), sum(odd) even_reverse = [] for j in range(0, len(even)): even_reverse.append( even [-1 -j]) print print even_reverse print " + " print odd t = [] for j in range(0, len(odd)): t.append(odd[j] + even_reverse[j]) print t r = [] for i in range(0 , len(l) , 2): r.append(l[i]+l[i+1]) print r