avamsi

from math import log
try:
	while True:
		print int(log(int(raw_input()), 2))
except ValueError:
	pass

avamsi

from math import sqrt
primes = [2]
for i in xrange(3, 32000, 2):
	isPrime = True
	cap = sqrt(i) + 1
	for j in primes:
		if j >= cap:
			break
		if not i%j:
			isPrime = False

avamsi

from math import log
try:
	while True:
		a, b = map(int, raw_input().split('e'))
		n = a * 10**b
		p = 1 << int(log(n, 2))
		ans = 1 + 2*(n - p)
		print ans
except ValueError:
	pass

avamsi

ld = {'BC': [], 'CB': []}
nd = {'CC': 0, 'BB': 0}
for _ in xrange(int(raw_input())):
	s = raw_input()
	try:
		ld[s[0] + s[-1]].append(len(s))
	except KeyError:
		nd[s[0] + s[-1]] += len(s)
if len(ld['BC']) < len(ld['CB']):
	a = 'BC'

avamsi

save = out = int(raw_input())
flag = True
for _ in xrange(9):
	out += int(raw_input())
	if out < 100:
		save = out
	elif out is 100:
		print 100
		flag = False
		break

avamsi

for _ in xrange(int(raw_input())):
	a, b = map(int, raw_input().split())
	print a * b

avamsi

for _ in xrange(int(raw_input())):
	n = int(raw_input())
	out = 0; f = 5
	while n / f is not 0:
		out += n / f
		f = f * 5
	print out

avamsi

#include <iostream>
#include <iomanip>
#include <vector>
#include <list>
#include <string.h>
#include <math.h>
using namespace std;

const int base = 1000000000; const int base_digits = 9;

avamsi

mod = 10**9 + 7
cache = {0: 1, 1: 1}
def fibo(x):
	try:
		return cache[x]
	except KeyError:
		pass
	k = x / 2
	if x % 2:
		cache[x] = (fibo(k) * (2*fibo(k-1) + fibo(k))) % mod

avamsi

from math import sqrt
for _ in xrange(int(raw_input())):
	u, v, w, w1, v1, u1 = map(int, raw_input().split())
	u2 = v**2 + w**2 - u1**2
	v2 = w**2 + u**2 - v1**2
	w2 = u**2 + v**2 - w1**2
	vol = sqrt(4 * u**2 * v**2 * w**2 - u**2 * u2**2 - v**2 * v2**2 - w**2 * w2**2 + u2 * v2 * w2) / 12
	print round(vol, 4)