func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     string s, t;     cin >> n;     vector<vector<int> > DP(26, vector<int>(26, -10000000));     for (int i = 0; i < n; i++) {       t = s;       cin >> s;       if (i > 0)         DP[t[0] -  a ][t[t.length() - 1] -  a ] =             max(DP[t[0] -  a ][t[t.length() - 1] -  a ], (int)t.length());       for (int j = 0; j < 26; j++)         DP[j][s[s.length() - 1] -  a ] = max(DP[j][s[s.length() - 1] -  a ],                                              DP[j][s[0] -  a ] + (int)s.length());     }     t = s;     DP[t[0] -  a ][t[t.length() - 1] -  a ] =         max(DP[t[0] -  a ][t[t.length() - 1] -  a ], (int)t.length());     int Ans = 0;     for (int i = 0; i < 26; i++) Ans = max(Ans, DP[i][i]);     cout << Ans;     return 0;   }   