Problem:
Score : 100 points

Problem Statement

In AtCoder City, there are three stations numbered 1, 2, and 3.

Each of these stations is operated by one of the two railway companies, A and B. A string S of length 3 represents which company operates each station. If S_i is A, Company A operates Station i; if S_i is B, Company B operates Station i.

To improve the transportation condition, for each pair of a station operated by Company A and one operated by Company B, there will be a bus service connecting them.

Determine if there is a pair of stations that will be connected by a bus service.

Constraints

Each character of S is A or B.

|S| = 3

Input

Input is given from Standard Input in the following format:

S

Output

If there is a pair of stations that will be connected by a bus service, print Yes; otherwise, print No.

Sample Input 1

ABA

Sample Output 1

Yes

Company A operates Station 1 and 3, while Company B operates Station 2.

There will be a bus service between Station 1 and 2, and between Station 2 and 3, so print Yes.

Sample Input 2

BBA

Sample Output 2

Yes

Company B operates Station 1 and 2, while Company A operates Station 3.

There will be a bus service between Station 1 and 3, and between Station 2 and 3, so print Yes.

Sample Input 3

BBB

Sample Output 3

No

Company B operates all the stations. Thus, there will be no bus service, so print No.

Solution in Python (3.4.3) (judge verdict: Runtime Error)

from sys import stdin

A, B = [int(x) for x in stdin.readline().rstrip().split()]

min_eight_ex_tax = float(A / 0.08)
max_eight_ex_tax = float((A + 1) / 0.08)
min_ten_ex_tax = int(B / 0.1)
max_ten_ex_tax = int((B + 1) / 0.1)

res = float(-1)
for x in range(min_ten_ex_tax, max_ten_ex_tax, 1):
    if min_eight_ex_tax <= x < max_eight_ex_tax:
        res = float(x)
        break
#print(min_eight_ex_tax, max_eight_ex_tax, min_ten_ex_tax, max_ten_ex_tax)
print(int(res))