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 <ctype.h>
#include <stdio.h>

int main()
{
    int a;
    printf("文字を一文字：");
    scanf("%d", &a);

    if (islower(a) != 0) 
    {
        printf("a\n");
        printf("%d\n",islower(a));
    }
    else
    {
        printf("A\n");
    }
    return 0;
}