func_code_string: #include <bits/stdc++.h>   using namespace std;   bool vv[2000][2000];   int main() {     int n;     string s;     cin >> s;     long long left[2000], right[2000];     for (int i = 0; i < s.length(); i++) {       vv[i][i] = true;     }     int sm = 1, cp = s.length() - 1;     for (; sm < s.length(); sm++) {       for (int i = sm, j = 0; i < s.length(); i++, j++) {         if (s[j] == s[j + sm] && (sm == 1 || vv[j + 1][j + sm - 1])) {           vv[j][j + sm] = true;         } else {           vv[j][j + sm] = false;         }       }     }     for (int i = 0; i < s.length(); i++) {       left[i] = 1;       right[i] = 1;       for (int j = 0; j < i; j++) {         if (vv[j][i]) left[i]++;         if (vv[s.length() - (i + 1)][s.length() - (j + 1)]) right[i]++;       }     }     long long res = 0, right_sum = 0;     for (int i = 0; i < s.length() - 1; i++) right_sum += right[i];     for (int i = 0; i < s.length() - 1; i++) {       res += left[i] * right_sum;       right_sum -= right[s.length() - (i + 2)];     }     cout << res << endl;     return 0;   }   