Osajono

#include <string.h>
#include <iostream>

using namespace std;

#define ull unsigned long long

int main() {
    cin.sync_with_stdio(false);
    char input[100000];
    cin.getline(input, 100000);
    ull a = strlen(input);
    ull i;
    ull j;
    ull z;
    ull l = strlen(input);
    for (i = 2; i < l; i++) {
        z = (l - i + 1);
        for (j = 0; j < z; j++) {
            a += !(input[j] - input[j+i-1]);
	}
    }
    if (input[0] == input[l-1])
	a++;
    cout << a << "\n";
    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: TIME LIMIT EXCEEDED

Test 12

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 13

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 14

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 15

Group: 3

Verdict: TIME LIMIT EXCEEDED