Osajono

input/code.cpp: In function 'int main()':
input/code.cpp:6:56: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define fromto(var, from, to) for (int var = from; var < to; var++)
                                                        ^
input/code.cpp:14:2: note: in expansion of macro 'fromto'
  fromto(i,0,s.length()) { m[s[i]-'A']++; }
  ^

#include <iostream>

using namespace std;

const int len = 'Z'-'A'+1;
#define fromto(var, from, to) for (int var = from; var < to; var++)

int main() {
	cin.sync_with_stdio(false);
	string s;
	cin >> s;
	long long m[len], z = 0;
	fromto(i,0,len) { m[i] = 0; }
	fromto(i,0,s.length()) { m[s[i]-'A']++; }
	fromto(i,0,len) { z+=m[i]*(m[i]+1)/2; }
	cout << z << endl;
}

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