Problem:
Score : 100 points

Problem Statement

An uppercase or lowercase English letter \alpha will be given as input.
If \alpha is uppercase, print A; if it is lowercase, print a.

Constraints

\alpha is an uppercase (A - Z) or lowercase (a - z) English letter.

Input

Input is given from Standard Input in the following format:

α

Output

If \alpha is uppercase, print A; if it is lowercase, print a.

Sample Input 1

B

Sample Output 1

A

B is uppercase, so we should print A.

Sample Input 2

a

Sample Output 2

a

a is lowercase, so we should print a.

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

#include<stdio.h>
int main(){
  long int n; 
  int i,j;
  char c[100];
  scanf("%ld",&n);
  for(i=0;n>0;i++){
    n--;
    c[i]+='a'+n%26;
    n=n/26;
  }
  for(j=i-1;j>=0;j--){
    printf("%c",&c[j]);
  }
  return 0;
}