func_code_string: #include <bits/stdc++.h>   using namespace std;   const int M = 2048;   char s[M], b[M], e[M], fb[M], fe[M];   int r[2][M], *p = r[0], *q = r[1], h[M];   int main(void) {     cin >> s >> b >> e;     int ns = strlen(s), nb = strlen(b), ne = strlen(e), nn = nb > ne ? nb : ne,         w = 0;     for (int i = ns; i-- > 0;) {       if (!strncmp(s + i, b, nb)) fb[i] = 1;       if (!strncmp(s + i, e, ne)) fe[i] = 1;     }     for (int i = 0, *t; i < ns; ++i, t = p, p = q, q = t)       for (int j = i; j-- > 0;) {         q[j + 1] = (s[i] == s[j]) ? (p[j] + 1) : 0;         if (h[i] < q[j + 1]) h[i] = q[j + 1];       }     for (int i = ns; i-- > 0;)       if (fb[i])         for (int j = i + nn; j <= ns; ++j)           if (fe[j - ne] && h[j - 1] < j - i) ++w;     cout << w << endl;   }   