Ositus

input/code.cpp: In function 'int main(int, char**)':
input/code.cpp:17:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (unsigned long long i = 0; i < (1 << (in.size() - 1)); i++)
                                    ~~^~~~~~~~~~~~~~~~~~~~~~~~

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

int main(int argc, char **argv)
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    string in;
    cin >> in;

    ll length = 0;

    for (unsigned long long i = 0; i < (1 << (in.size() - 1)); i++)
    {
        vector<bool> v(122, false);

        bool isLegal = true;

        v[in[0]] = true;

        for (unsigned long long j = 0; j < in.size() - 1; j++)
        {
            if (i & (1 << j))
            {
                fill(v.begin(), v.end(), false);
                v[in[j + 1]] = true;
                continue;
            }
            else
            {
                if (!v[in[j + 1]])
                {
                    v[in[j + 1]] = true;
                }
                else
                {
                    isLegal = false;
                    break;
                }
            }
        }

        if (isLegal)
        {
            length++;
        }
    }

    cout << length << "\n";
}

Test 1

Group: 1, 2, 3

Verdict: ACCEPTED

Test 2

Group: 1, 2, 3

Verdict: ACCEPTED

Test 3

Group: 1, 2, 3

Verdict: ACCEPTED

Test 4

Group: 1, 2, 3

Verdict: ACCEPTED

Test 5

Group: 2, 3

Verdict: WRONG ANSWER

Test 6

Group: 3

Verdict: WRONG ANSWER

Test 7

Group: 3

Verdict: TIME LIMIT EXCEEDED