func_code_string: #include <bits/stdc++.h>   using namespace std;   vector<long long unsigned> p_pow;   vector<long long unsigned> reverse_p_pow;   const int hash_base = 31;   long long unsigned binpow(long long unsigned a, long long unsigned n) {     long long res = 1;     while (n) {       if (n & 1) res *= a;       a *= a;       n >>= 1;     }     return res;   };   const long long unsigned MAX_DEGREE = binpow(2, 63) - 1;   vector<long long unsigned> init_p_pow(int length_of_vector) {     vector<long long unsigned> res(length_of_vector);     long long unsigned p_pow = (long long unsigned)hash_base;     res[0] = 1;     for (size_t i = 1; i < length_of_vector; i++)       if (i) res[i] = res[i - 1] * p_pow;     return res;   }   vector<long long unsigned> init_reverse_p_pow(       vector<long long unsigned> p_pow) {     vector<long long unsigned> result(p_pow.size());     int l = p_pow.size();     for (int i = 0; i < l; i++) result[i] = binpow(p_pow[i], MAX_DEGREE);     return result;   };   vector<int> zfunction(string s) {     int n = s.length();     vector<int> z(n, 0);     for (int i = 1, l = 0, r = 0; i < n; i++) {       if (i <= r) z[i] = min(r - i + 1, z[i - l]);       while (i + z[i] < n && s[z[i]] == s[i + z[i]]) ++z[i];       if (i + z[i] - 1 > r) l = i, r = i + z[i] - 1;     }     return z;   }   pair<string, vector<long long unsigned> > getHashes(string s) {     if (p_pow.size() == 0) p_pow = init_p_pow(2000);     if (reverse_p_pow.size() == 0) reverse_p_pow = init_reverse_p_pow(p_pow);     vector<long long unsigned> result(s.length());     int l = s.length();     for (int i = 0; i < l; i++) {       result[i] = (s[i] -  a  + 1) * p_pow[i];       if (i) result[i] += result[i - 1];     }     return make_pair(s, result);   }   inline long long unsigned get_hash_substr(       pair<string, vector<long long unsigned> > h, int i, int j) {     long long unsigned res = 0;     res = h.second[j];     if (i) res -= h.second[i - 1];     res *= reverse_p_pow[i];     return res;   }   int main() {     string t, a, b;     cin >> t >> a >> b;     vector<int> za = zfunction(a +  #  + t);     vector<int> zb = zfunction(b +  #  + t);     vector<int> ia(t.length(), 0);     vector<int> ib(t.length(), 0);     int la = a.length();     int lb = b.length();     int lt = t.length();     pair<string, vector<long long unsigned> > t_hash = getHashes(t),                                               a_hash = getHashes(a),                                               b_hash = getHashes(b);     int intersection = 0;     int i1 = la - 1;     int j2 = 0;     int count = 1;     int mi = min(la, lb);     bool f = false;     long long unsigned ha, hb;     while (count <= mi) {       f = false;       ha = a_hash.second[la - 1];       if (i1) ha -= a_hash.second[i1 - 1];       ha *= reverse_p_pow[i1];       hb = b_hash.second[j2];       hb *= reverse_p_pow[0];       f = (ha == hb);       if (f)         if (count > intersection) intersection = count;       i1--;       j2++;       count++;     }     long long unsigned *answer = new long long unsigned[2001000];     int len_ans = 0;     int c1 = 0, c2 = 0;     for (int i = 0; i < lt; i++) {       if (za[la + 1 + i] == la)         ia[i] = 1;       else         c1++;       if (zb[lb + 1 + i] == lb)         ib[i] = 1;       else         c2++;     }     if (c2 + c1 == 2 * lt) {       cout << 0;       return 0;     }     for (int i = 0; i < lt; i++) {       if (ia[i]) {         for (int j = i + la - intersection; j < lt; j++) {           if (ib[j]) {             long long unsigned h = t_hash.second[j + lb - 1];             if (i) h -= t_hash.second[i - 1];             h *= reverse_p_pow[i];             answer[len_ans] = h;             len_ans++;           }         }       }     }     sort(answer, answer + len_ans);     int ans_count = 0;     for (int i = 0; i < len_ans - 1; i++) {       if (answer[i] != answer[i + 1]) ans_count++;     }     if (len_ans) ans_count++;     cout << ans_count;     return 0;   }   