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: Accepted)

#include <stdio.h>

#define f(i, q) for(int i = 0; i < q; i++)  

typedef long long ll;

int main() {
    ll i, j, k;
    ll ans = 0;

    char input;
    scanf("%c", &input);

    // printf("%d\n", input);

    if((input - 91) < 0) {
        printf("A\n");
    } else {
        printf("a\n");
    }

    // printf("lld\n", ans);

    return 0;
}