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 Java (OpenJDK 11.0.6) (judge verdict: Runtime Error)

import java.util.HashMap;
import java.util.Scanner;

/**
 *
 * @author HP
 */
class Main {
   public static void main(String[] args) {
       Scanner s = new Scanner(System.in);
       int n = s.nextInt();
       HashMap<Integer,Integer> map = new HashMap<>();
       int temp;
       long sum=0;
       for(int i =0; i < n; i++) {
           temp = s.nextInt();
           sum+=temp;
           map.put(temp,map.getOrDefault(temp,0));
           }
//       System.out.println(map);
       int q = s.nextInt();
       int b,c=0,count=0;
       while(q>0) {
           b = s.nextInt();
           c = s.nextInt();
           count=0;
           if(map.containsKey(b)) {
               temp = map.get(b);
               map.remove(b);
               int x=temp*b;
             int y=temp*c;
               sum = sum -x+y;
              map.put(c,map.getOrDefault(c,0)+temp);
           }
//           System.out.println(map);
           System.out.println(sum);q--;
       }
   }
}