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<stdio.h>
#include<string.h>

int main(void){

    unsigned long int a, b, x;
    long long  int a5, b5;
    scanf("%ld", &x);

    for(long long int i = -200; i< 200; i++){
        for (long long int j= -200; j < 200; j++)
        {
            a5 = i * i * i * i * i;
            b5 = j * j * j * j * j;
             if (x == (a5-b5))
            {
                printf("%lld %lld", i, j);
                return 0;
            }
        }
    }

    return 0;
}