Osajono

#include <stdio.h>
#include <stdlib.h>

int summa(int i)
{
    return i > 0 ? i + summa(i - 1) : 0;
}

int main()
{
    int i, j, k, tuloste = 0;
    char syote[100001];

    if(fgets(syote, sizeof(syote), stdin) != 0)
    {
        for(i = 'A'; i < 'Z' + 1; i++)
        {
            k = 0;
            for(j = 0; syote[j] != 0; j++)
                if(syote[j] == i || syote[j] == i + 32)
                    k++;

            tuloste += summa(k);
        }
    }

    printf("%u\n", tuloste);
    return 0;
}

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: WRONG ANSWER

Test 14

Group: 3

Verdict: WRONG ANSWER

Test 15

Group: 3

Verdict: WRONG ANSWER