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 C++14 (GCC 5.4.1) (judge verdict: Wrong Answer)

#include <bits/stdc++.h>
using namespace std;

#define SIZE_OF_ARRAY(array) sizeof(array)/sizeof(array[0])

int main() {
    std::vector<char> A;
    string S;
    int Q;
    cin >> S >> Q;
    for(int i=0; i<S.length(); i++){
        A.push_back(S[i]);
    }
    for(int i=0; i<Q; i++){
        int T;
        cin >> T;
        if(T==1){
            std::reverse(A.begin(), A.end());
        } else {
            int F;
            char C;
            cin >> F >> C;
            if(F==1){
                A.insert(A.begin(), C);
            } else {
                A.push_back(C);
            }
        }
    }
    string ans = "";
    for(int i=0; i < A.size(); i++){
        ans = ans + A.at(i);
    }
    cout << ans << endl;
}