#include<bits/stdc++.h>
#define pll pair<ll, ll>
#define fi first
#define se second
#define pb push_back
#define pii pair<ll, pll>
using namespace std;
using ll = int;
const int N = 2e5+55;
const ll mod = 1e9+7;
const ll mod1 = 1e9+1;
const ll base = 311;
const ll base1 = 331;
ll m, n, t, k, a[N], tong, b[N], p[12], p1[12], c[N], lab[N], cnt;
long long ans;
string s[N];
vector<ll> adj[N];
vector<pll> e;
ll pw(ll k, ll n)
{
ll total = 1;
for(; n; n >>= 1)
{
if(n & 1)total = total * k % mod;
k = k * k % mod;
}
return total;
}
void dfs(ll u)
{
b[u] = 1;
for(ll v : adj[u])
{
dfs(v);
b[u] = b[u] * (b[v] + 1) % mod;
}
//cout << u << " " << b[u][0] <<" "<<b[u][1] << '\n';
}
void cal(ll u, ll sum)
{
a[u] = sum * b[u] % mod;
for(ll v : adj[u])
{
cal(v, a[u] * pw(b[v]+1, mod-2) % mod + 1);
}
}
pll findp(ll u)
{
if(lab[u] < 0)return {0, u};
pll x = findp(lab[u]);
x.fi += a[u];
return x;
}
void hop(pll u, pll v, ll w)
{
if(lab[u.se] > lab[v.se])
{
swap(u, v);
w = -w;
}
lab[u.se] += lab[v.se];
lab[v.se] = u.se;
b[u.se] |= b[v.se];
a[v.se] += w - v.fi + u.fi;
}
map<pll, ll> mp, ok;
ll get(ll l, ll r)
{
return ( a[r] - 1ll * a[l-1] * p[r-l+1] % mod + mod) % mod;
}
ll get1(ll l, ll r)
{
return ( b[r] - 1ll * b[l-1] * p1[r-l+1] % mod1 + mod1) % mod1;
}
int main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
cin >> n;
for(int i = 0; i < n; i ++)
{
cin >> s[i];
e.pb({s[i].length(), i});
}
p[0] = p1[0] = 1;
for(int i = 1; i <= 10; i ++)
{
p[i] = 1ll p[i-1] * base % mod;
p1[i] = 1ll p1[i-1] * base1 % mod1;
}
sort(e.begin(), e.end());
for(int i = 0; i < n; i ++)
{
int id = e[i].se;
m = e[i].fi;
for(int j = 1; j <= m; j ++)
{
a[j] = (1ll * a[j-1] * base % mod + (s[id][j-1] - 'a' + 2)) % mod;
b[j] = (1ll * b[j-1] * base1 % mod1 + (s[id][j-1] - 'a' + 2)) % mod1;
}
ok.clear();
for(int l = 1; l <= m; l ++)
{
for(int r = l; r <= m; r ++)
{
if(ok[{get(l, r), get1(l, r)}] == 0)
{
ok[{get(l, r), get1(l, r)}] = 1;
ans += mp[{get(l, r), get1(l, r)}];
if(l == 1 && r == m)ans += mp[{get(l, r), get1(l, r)}];
}
}
}
++mp[{a[m], b[m]}];
}
cout << ans;
}
/*
1
5 9
1 2 3 2
1 3 2 -2
2 2 3
1 3 2 -3
2 2 3
1 1 4 7
1 4 5 8
2 5 2
2 5 1
1 5 6
1 1 2 2
1 2 4 3
2 1 4
1 1 5 6
1 2 3 -2
2 3 5
*/
Compilation message
lozinke.cpp: In function 'int main()':
lozinke.cpp:92:19: error: expected ';' before 'p'
92 | p[i] = 1ll p[i-1] * base % mod;
| ^~
| ;
lozinke.cpp:93:20: error: expected ';' before 'p1'
93 | p1[i] = 1ll p1[i-1] * base1 % mod1;
| ^~~
| ;
