#include <bits/stdc++.h>   using namespace std;   inline namespace Infinity {   inline namespace Constant {   constexpr const int eof = EOF;   constexpr const int maxint = INT_MAX;   constexpr const long long maxll = LLONG_MAX;   }  // namespace Constant   inline namespace TypeDefine {   using uint = unsigned int;   using ull = unsigned long long int;   using ld = long double;   template <typename T = vector<int>>   using iter = typename T::iterator;   template <typename T = int>   using vector_vector = vector<vector<T>>;   template <typename T = int, typename U = int>   using vector_pair = vector<pair<T, U>>;   }  // namespace TypeDefine   inline namespace IO {   const char CR =   n ;   const char SP =    ;   inline void write(const int n) { printf( %d , n); }   inline void write(const unsigned n) { printf( %u , n); }   inline void write(const long long n) { cout << n; }   inline void write(const unsigned long long n) { cout << n; }   inline void writef(const double a, const int n = 15) { printf( %.*f , n, a); }   inline void writef(const long double a, const int n = 18) {     cout << setprecision(n) << fixed << a;   }   inline void write(const char c) { printf( %c , c); }   inline void write(const char s[]) { printf( %s , s); }   inline void write(const string &s) { printf( %s , s.data()); }   inline void write(const pair<int, int> &p) {     printf( %d %d , p.first, p.second);   }   template <class T>   inline void write(const T a) {     for (auto i = a.begin(); i != a.end(); i++) {       if (i != a.begin()) write(SP);       write(*i);     }   }   template <typename T>   inline void writer(T begin, T end) {     for (write(*begin++); begin != end; ++begin) write(SP), write(*begin);   }   inline void writeln() { write(CR); }   template <typename T>   inline void writeln(const T &a) {     write(a);     write(CR);   }   inline void writefln(const double a, int n) {     printf( %.*f , n, a);     write(CR);   }   inline void writefln(const long double a, int n = 18) {     cout << setprecision(n) << fixed << a << endl;   }   inline void writesln(const int *a, const int l, const int r) {     for (int i = l; i <= r; i++) printf( %d  , a[i]);     writeln(CR);   }   template <typename T>   inline void writerln(T begin, T end) {     for (write(*begin++); begin != end; ++begin) write(SP), write(*begin);     write(CR);   }   template <class T>   inline void writelns(const T &a) {     for (auto n : a) writeln(n);   }   template <typename T, typename... types>   inline void write(const T &a, const types &...args) {     write(a);     write(args...);   }   template <typename... types>   inline void writeln(const types &...args) {     write(args...);     write(CR);   }   template <typename... types>   inline void writeSP(const types &...args) {     write(args...);     write(SP);   }   inline void writelnYN(bool b) { writeln(b ?  YES  :  NO ); }   inline void writelnyn(bool b) { writeln(b ?  Yes  :  No ); }   string caseSharpSpace(int n) { return  Case #  + to_string(n) +  :  ; }   string caseNoSharpSpace(int n) { return  Case   + to_string(n) +  :  ; }   string caseSharpNoSpace(int n) { return  Case #  + to_string(n) +  : ; }   string caseNoSharpNoSpace(int n) { return  Case   + to_string(n) +  : ; }   inline int read(int &n) { return scanf( %d , &n); }   inline int read(long long &n) { return cin >> n ? 1 : -1; }   template <typename T, typename... types>   inline int read(T &n, types &...args) {     return read(n) == -1 ? -1 : read(args...) + 1;   }   inline char getcc() {     char c;     do c = getchar();     while (c ==     || c ==   n );     return c;   }   inline int getint() {     int n;     read(n);     return n;   }   inline long long getll() {     long long n;     read(n);     return n;   }   inline double getdouble() {     double n;     scanf( %lf , &n);     return n;   }   inline vector<int> getints(int n) {     vector<int> v(n);     for (int i = 0; i < n; i++) v[i] = getint();     return v;   }   inline vector<pair<int, int>> getpairs(int n) {     vector<pair<int, int>> v(n);     for (int i = 0; i < n; i++) {       int a = getint(), b = getint();       v[i] = pair<int, int>(a, b);     }     return v;   }   inline void read(string &str, const unsigned size) {     char s[size];     scanf( %s , s);     str.assign(s);   }   inline string getstr(const unsigned size = 1048576) {     string s;     read(s, size + 1);     return s;   }   inline string getln(const unsigned size = 1048576) {     char s[size + 1];     scanf( %[^ n] , s);     getchar();     return string(s);   }   }  // namespace IO   inline namespace Function {   inline constexpr int ctoi(const char c) { return c -  0 ; }   inline constexpr char itoc(const int n) { return n +  0 ; }   inline int dtoi(const double d) { return round(d); }   template <typename T>   inline constexpr bool in(T x, T l, T r) {     return l <= x && x <= r;   }   template <class T>   inline int size(const T &a) {     return a.size();   }   template <class T>   inline void sort(T &a) {     std::sort(a.begin(), a.end());   }   template <class T1, class T2>   inline void sort(T1 &a, T2 comp) {     std::sort(a.begin(), a.end(), comp);   }   template <class T1, typename T2>   inline int lbound(const T1 &a, const T2 k) {     return lower_bound(a.begin(), a.end(), k) - a.begin();   }   template <class T1, typename T2>   inline int ubound(const T1 &a, const T2 k) {     return upper_bound(a.begin(), a.end(), k) - a.begin();   }   template <class T1, class T2>   int count(T1 &a, T2 k) {     return ubound(a, k) - lbound(a, k);   }   template <class T1, class T2>   int find(T1 &a, T2 k) {     return count(a, k) ? lbound(a, k) : -1;   }   template <typename T>   inline void clear(T &a) {     memset(a, 0, sizeof a);   }   template <typename T>   T gcd(T a, T b) {     while (b) {       T t = a % b;       a = b;       b = t;     }     return a;   }   template <typename T>   T lcm(T a, T b) {     return a / gcd(a, b) * b;   }   long long qpow(long long a, long long b, long long c) {     return b ? qpow(a * a % c, b >> 1, c) * (b & 1 ? a : 1) % c : 1;   }   template <typename T>   T exGcd(T a, T b, T &x, T &y) {     T d = a;     if (b) {       d = exGcd(b, a % b, y, x);       y -= a / b * x;     } else {       x = 1;       y = 0;     }     return d;   }   template <typename T>   T constexpr inline mps(T l, T r, T k) {     return ((r - (r % k + k) % k) - (l + (k - l % k) % k)) / k + 1;   }   template <typename T>   T constexpr inline sgn(T a) {     return a == 0 ? 0 : a > 0 ? 1 : -1;   }   template <typename T>   constexpr inline T sq(T a) {     return a * a;   }   template <typename T>   constexpr inline bool odd(T a) {     return bool(a % 2);   }   template <typename T>   constexpr inline bool even(T a) {     return !bool(a % 2);   }   template <typename T1, typename T2>   constexpr inline T1 smod(T1 x, T2 m) {     return x > m ? x - m : x + m < m ? x + m : x;   }   template <typename T, typename F>   T dichotomy(T l, T r, F check, T prec = 1) {     while (r - l > prec) {       T m = l + (r - l) / 2;       check(m) ? l = m : r = m;     }     return l;   }   bool contains(const string &s, const string &t) {     return s.find(t) != string::npos;   }   template <typename T>   bool contains(const T &s, typename T::value_type t) {     for (typename T::value_type c : s)       if (c == t) return true;     return false;   }   }  // namespace Function   }  // namespace Infinity   int main(int, char *[]) {     int n = getint();     vector<int> a = getints(n);     vector<string> s(n), r(n);     for (int i = 0; i < n; i++) {       cin >> s[i];       r[i].resize(s[i].size());       reverse_copy(s[i].begin(), s[i].end(), r[i].begin());     }     vector<vector<unsigned long long>> d(n, vector<unsigned long long>(2, -1));     d[0][0] = 0;     d[0][1] = a[0];     for (int i = 1; i < n; i++) {       if (s[i] >= s[i - 1]) {         d[i][0] = min(d[i][0], d[i - 1][0]);       }       if (s[i] >= r[i - 1]) {         d[i][0] = min(d[i][0], d[i - 1][1]);       }       if (r[i] >= s[i - 1] && d[i - 1][0] != -1) {         d[i][1] = min(d[i][1], d[i - 1][0] + a[i]);       }       if (r[i] >= r[i - 1] && d[i - 1][1] != -1) {         d[i][1] = min(d[i][1], d[i - 1][1] + a[i]);       }     }     writeln((long long)(min(d.back().front(), d.back().back())));     return 0;   }