Osajono

/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

import java.util.*; 
import java.io.*;
/**
 *
 * @author alexey
 */
public class Datatahti20161 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Scanner scan=new Scanner(System.in);
        
        
   
        String input=scan.nextLine();
        long answer=0;
        
        answer+=input.length();
        
        long[] letters=new long[26];
        long l=input.length();
        
        
        for (int i = 0; i < l; i++) {
            int c =input.charAt(i)-65;
            
            letters[c]++;
            
        }
        for (int i = 0; i < 26; i++) {
            if(letters[i]==0){
                
            }else{
                long k=0;
                long b=letters[i]-1;
                while(b>0){
                    k+=b;
                    b--;
                }
             answer+=k;
            }
            
        }
       
      
        System.out.print(answer);
       
    }
    
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: ACCEPTED

Test 6

Group: 2

Verdict: ACCEPTED

Test 7

Group: 2

Verdict: ACCEPTED

Test 8

Group: 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: ACCEPTED

Test 10

Group: 2

Verdict: ACCEPTED

Test 11

Group: 3

Verdict: ACCEPTED

Test 12

Group: 3

Verdict: ACCEPTED

Test 13

Group: 3

Verdict: ACCEPTED

Test 14

Group: 3

Verdict: ACCEPTED

Test 15

Group: 3

Verdict: ACCEPTED