Osajono

input/code.cpp: In function 'int main()':
input/code.cpp:11:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j = 0; j < s.size(); ++j) {
                          ^

#include <iostream>
using namespace std;
int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    string s;
    cin>>s;
    long long ans = 0;
    for(int i = 'A'; i <= 'Z'; ++i) {
        long long cnt = 0;
        for(int j = 0; j < s.size(); ++j) {
            if(s[j] == i) ++cnt;
        }
        ans += cnt*(cnt+1)/2;

    }
    cout<<ans<<'\n';
}

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