func_code_string: #include <bits/stdc++.h>   using namespace std;   long long par[27];   long long parent(long long x) {     while (x != par[x]) {       par[x] = par[par[x]];       x = par[x];     }     return x;   }   void uni(long long x, long long y) {     long long px = parent(x);     long long py = parent(y);     par[y] = px;   }   int main() {     long long t = 1;     while (t--) {       long long n;       cin >> n;       set<long long> st;       for (long long i = 0; i < 27; i++) par[i] = i;       for (long long i = 0; i < n; i++) {         string s;         cin >> s;         st.insert(s[0] -  a );         for (long long i = 1; i < s.length(); i++) {           st.insert(s[i] -  a );           uni(s[0] -  a , s[i] -  a );         }       }       long long ans = 0;       for (long long i = 0; i < 26; i++)         if (parent(i) == i && st.find(i) != st.end()) ans++;       cout << ans << endl;     }     return 0;   }   