from timeit import Timer

count = 5

print 1
t = Timer("""
a = list(range(10000))
todel = []
for z in a:
    if z % 2:
        todel.append(z)
for z in todel:
    a.remove(z)
#print sum(a)
""")
print t.timeit(count)

print 2
t = Timer("""
a = list(range(10000))
shift = 0
for i in range(10000):
    if a[i-shift] % 2:
        del a[i-shift]
        shift += 1
#print sum(a)
""")
print t.timeit(count)

print 3
t = Timer("""
a = list(range(10000))
todel = []
for i in range(10000):
    if a[i] % 2:
        todel.append(i)
todel.reverse()
for z in todel:
    del a[z]
#print sum(a)
""")
print t.timeit(count)

print 4
t = Timer("""
a = list(range(10000))
for z in reversed(a):
    if z % 2:
        a.remove(z)
#print sum(a)
""")
print t.timeit(count)

print 5
t = Timer("""
a = list(range(10000))
a.reverse()
for z in a:
    if z % 2:
        a.remove(z)
#print sum(a)
""")
print t.timeit(count)

print 6
t = Timer("""
a = list(range(10000))
shift = 0
for i in range(10000):
    if a[shift] % 2:
        del a[shift]
        shift -= 1
    shift += 1
#print sum(a)
""")
print t.timeit(count)