Problem:
Score : 100 points

Problem Statement

AtCoder Inc. holds a contest every Saturday.

There are two types of contests called ABC and ARC, and just one of them is held at a time.

The company holds these two types of contests alternately: an ARC follows an ABC and vice versa.

Given a string S representing the type of the contest held last week, print the string representing the type of the contest held this week.

Constraints

S is ABC or ARC.

Input

Input is given from Standard Input in the following format:

S

Output

Print the string representing the type of the contest held this week.

Sample Input 1

ABC

Sample Output 1

ARC

They held an ABC last week, so they will hold an ARC this week.

Solution in C++ (GCC 9.2.1) (judge verdict: Wrong Answer)

#include<iostream>
#include<algorithm>
#include<cmath>

using namespace std;

int main() {
    int X, ansa = -1, ansb = -1;
    cin >> X;
    for (int a = -100; a <= 100; a++) {
        for (int b = -100; b <= 100; b++) {
            if (a * a * a * a * a - b * b * b * b * b == X) {
                ansa = a, ansb = b;
                break;
            }
        }
    }
    cout << ansa << " " << ansb << endl;
    return 0;
}