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#include <bits/stdc++.h>
using namespace std;
 
int n, res = 0;
string a[29];
int b[29], f[(1 << 26)];
 
signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0), cout.tie(0);
 
    cin >> n;
    for (int i = 0; i < n; i++)
    {
        cin >> a[i];
        int mask = 0;
        for (char c : a[i])
        {
            int cur = c - 'a';
            mask |= (1 << cur);
        }
        b[i] = mask;
    }
 
    for (int mask = 1; mask < (1 << n); mask++)
    {
        int bit = __builtin_ffs(mask) - 1;
        f[mask] = (b[bit] | f[mask - (1 << bit)]);
        if (f[mask] == (1 << 26) - 1) res++;
    }
    cout << res;
 
    return 0;
}
 

Main.java:1: error: illegal character: '#'
#include <bits/stdc++.h>
^
Main.java:1: error: class, interface, or enum expected
#include <bits/stdc++.h>
         ^
Main.java:4: error: class, interface, or enum expected
int n, res = 0;
^
Main.java:5: error: class, interface, or enum expected
string a[29];
^
Main.java:6: error: class, interface, or enum expected
int b[29], f[(1 << 26)];
^
Main.java:8: error: class, interface, or enum expected
signed main()
^
Main.java:11: error: class, interface, or enum expected
    cin.tie(0), cout.tie(0);
    ^
Main.java:13: error: class, interface, or enum expected
    cin >> n;
    ^
Main.java:14: error: class, interface, or enum expected
    for (int i = 0; i < n; i++)
    ^
Main.java:14: error: class, interface, or enum expected
    for (int i = 0; i < n; i++)
                    ^
Main.java:14: error: class, interface, or enum expected
    for (int i = 0; i < n; i++)
                           ^
Main.java:17: error: class, interface, or enum expected
        int mask = 0;
        ^
Main.java:18: error: class, interface, or enum expected
        for (char c : a[i])
        ^
Main.java:21: error: class, interface, or enum expected
            mask |= (1 << cur);
            ^
Main.java:22: error: class, interface, or enum expected
        }
        ^
Main.java:24: error: class, interface, or enum expected
    }
    ^
Main.java:26: error: class, interface, or enum expected
    for (int mask = 1; mask < (1 << n); mask++)
                       ^
Main.java:26: error: class, interface, or enum expected
    for (int mask = 1; mask < (1 << n); mask++)
                                        ^
Main.java:29: error: class, interface, or enum expected
        f[mask] = (b[bit] | f[mask - (1 << bit)]);
        ^
Main.java:30: error: class, interface, or enum expected
        if (f[mask] == (1 << 26) - 1) res++;
        ^
Main.java:31: error: class, interface, or enum expected
    }
    ^
Main.java:34: error: class, interface, or enum expected
    return 0;
    ^
Main.java:35: error: class, interface, or enum expected
}
^
23 errors

Standard output is empty