func_code_string: #include <bits/stdc++.h>   using namespace std;   int dp[150][150];   int main() {     int n;     cin >> n;     for (char a =  a ; a <=  z ; a++)       for (char b =  a ; b <=  z ; b++) dp[a][b] = -2000000009;     for (char c =  a ; c <=  z ; c++) dp[c][c] = 0;     while (n--) {       string s;       cin >> s;       char a = s[0], b = s[s.length() - 1];       for (char c =  a ; c <=  z ; c++)         dp[c][b] = max(dp[c][b], dp[c][a] + (int)s.length());     }     int ans = 0;     for (char c =  a ; c <=  z ; c++) ans = max(ans, dp[c][c]);     cout << ans << endl;     return 0;   }   