m = [-5, -2, 0, 3, 4]
print([n*2 for n in m]) a={1:5,2:3,3:4}
a.pop(3)
print(a) m = list(range(7,10))
print(m) a = [0, 1, 2, 3]
for a[0] in a:
print(a[0]) x = [5, 4, 3, 2]
x.insert(1, 0)
print(x)