#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) (int)a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x,y) ((x+y-1)/(y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl
#define rep(i,n) for(int i = 0; i < n; ++i)
#define rep1(i,n) for(int i = 1; i <= n; ++i)
#define rev(i,s,e) for(int i = s; i >= e; --i)
#define trav(i,a) for(auto &i : a)
template<typename T>
void amin(T &a, T b) {
a = min(a,b);
}
template<typename T>
void amax(T &a, T b) {
a = max(a,b);
}
#ifdef LOCAL
#include "debug.h"
#else
#define debug(x) 42
#endif
/*
*/
const int MOD = 998244353;
const int N = 1e5 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;
void solve(int test_case)
{
ll n; cin >> n;
vector<string> a(n);
rep(i,n) cin >> a[i];
rep(i,n){
auto s = a[i];
reverse(all(s));
a.pb(s);
}
sort(all(a));
a.resize(unique(all(a))-a.begin());
n = sz(a);
ll alpha = 6;
ll cnt[15][alpha][alpha];
memset(cnt,0,sizeof cnt);
rep(i,n){
auto &s = a[i];
cnt[sz(s)][s[0]-'a'][s.back()-'a']++;
}
ll ans = 0;
for(int len = 3; len <= 10; ++len){
auto &f = cnt[len];
rep(x1,alpha){
rep(y1,alpha){
rep(x2,alpha){
rep(y2,alpha){
rep(x3,alpha){
rep(y3,alpha){
rep(x4,alpha){
rep(y4,alpha){
ll mul1 = f[x1][y1]*f[x2][y2]%MOD*f[x3][y3]%MOD*f[x4][y4]%MOD;
ll mul2 = f[x1][x2]*f[x2][x3]%MOD*f[x3][x4]%MOD*f[x4][x1]%MOD;
ll mul3 = f[y1][y2]*f[y2][y3]%MOD*f[y3][y4]%MOD*f[y4][y1]%MOD;
ll add = mul1*mul2%MOD*mul3%MOD;
ans = (ans+add)%MOD;
}
}
}
}
}
}
}
}
}
cout << ans << endl;
}
int main()
{
fastio;
int t = 1;
// cin >> t;
rep1(i, t) {
solve(i);
}
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
175 ms |
8320 KB |
Output is correct |
2 |
Correct |
168 ms |
8844 KB |
Output is correct |
3 |
Correct |
171 ms |
7772 KB |
Output is correct |
4 |
Correct |
165 ms |
7772 KB |
Output is correct |
5 |
Correct |
166 ms |
8168 KB |
Output is correct |
6 |
Correct |
167 ms |
8284 KB |
Output is correct |
7 |
Correct |
166 ms |
8540 KB |
Output is correct |
8 |
Correct |
165 ms |
8540 KB |
Output is correct |
9 |
Correct |
169 ms |
9352 KB |
Output is correct |
10 |
Correct |
167 ms |
8536 KB |
Output is correct |
11 |
Correct |
168 ms |
7512 KB |
Output is correct |
12 |
Correct |
164 ms |
7772 KB |
Output is correct |
13 |
Correct |
168 ms |
7772 KB |
Output is correct |
14 |
Correct |
168 ms |
7684 KB |
Output is correct |
15 |
Correct |
165 ms |
8280 KB |
Output is correct |
16 |
Correct |
164 ms |
9560 KB |
Output is correct |
17 |
Correct |
167 ms |
7772 KB |
Output is correct |
18 |
Correct |
172 ms |
8024 KB |
Output is correct |
19 |
Correct |
165 ms |
7768 KB |
Output is correct |
20 |
Correct |
165 ms |
8796 KB |
Output is correct |
21 |
Correct |
182 ms |
9304 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
175 ms |
8320 KB |
Output is correct |
2 |
Correct |
168 ms |
8844 KB |
Output is correct |
3 |
Correct |
171 ms |
7772 KB |
Output is correct |
4 |
Correct |
165 ms |
7772 KB |
Output is correct |
5 |
Correct |
166 ms |
8168 KB |
Output is correct |
6 |
Correct |
167 ms |
8284 KB |
Output is correct |
7 |
Correct |
166 ms |
8540 KB |
Output is correct |
8 |
Correct |
165 ms |
8540 KB |
Output is correct |
9 |
Correct |
169 ms |
9352 KB |
Output is correct |
10 |
Correct |
167 ms |
8536 KB |
Output is correct |
11 |
Correct |
168 ms |
7512 KB |
Output is correct |
12 |
Correct |
164 ms |
7772 KB |
Output is correct |
13 |
Correct |
168 ms |
7772 KB |
Output is correct |
14 |
Correct |
168 ms |
7684 KB |
Output is correct |
15 |
Correct |
165 ms |
8280 KB |
Output is correct |
16 |
Correct |
164 ms |
9560 KB |
Output is correct |
17 |
Correct |
167 ms |
7772 KB |
Output is correct |
18 |
Correct |
172 ms |
8024 KB |
Output is correct |
19 |
Correct |
165 ms |
7768 KB |
Output is correct |
20 |
Correct |
165 ms |
8796 KB |
Output is correct |
21 |
Correct |
182 ms |
9304 KB |
Output is correct |
22 |
Incorrect |
160 ms |
8280 KB |
Output isn't correct |
23 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
175 ms |
8320 KB |
Output is correct |
2 |
Correct |
168 ms |
8844 KB |
Output is correct |
3 |
Correct |
171 ms |
7772 KB |
Output is correct |
4 |
Correct |
165 ms |
7772 KB |
Output is correct |
5 |
Correct |
166 ms |
8168 KB |
Output is correct |
6 |
Correct |
167 ms |
8284 KB |
Output is correct |
7 |
Correct |
166 ms |
8540 KB |
Output is correct |
8 |
Correct |
165 ms |
8540 KB |
Output is correct |
9 |
Correct |
169 ms |
9352 KB |
Output is correct |
10 |
Correct |
167 ms |
8536 KB |
Output is correct |
11 |
Correct |
168 ms |
7512 KB |
Output is correct |
12 |
Correct |
164 ms |
7772 KB |
Output is correct |
13 |
Correct |
168 ms |
7772 KB |
Output is correct |
14 |
Correct |
168 ms |
7684 KB |
Output is correct |
15 |
Correct |
165 ms |
8280 KB |
Output is correct |
16 |
Correct |
164 ms |
9560 KB |
Output is correct |
17 |
Correct |
167 ms |
7772 KB |
Output is correct |
18 |
Correct |
172 ms |
8024 KB |
Output is correct |
19 |
Correct |
165 ms |
7768 KB |
Output is correct |
20 |
Correct |
165 ms |
8796 KB |
Output is correct |
21 |
Correct |
182 ms |
9304 KB |
Output is correct |
22 |
Incorrect |
160 ms |
8280 KB |
Output isn't correct |
23 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
175 ms |
8320 KB |
Output is correct |
2 |
Correct |
168 ms |
8844 KB |
Output is correct |
3 |
Correct |
171 ms |
7772 KB |
Output is correct |
4 |
Correct |
165 ms |
7772 KB |
Output is correct |
5 |
Correct |
166 ms |
8168 KB |
Output is correct |
6 |
Correct |
167 ms |
8284 KB |
Output is correct |
7 |
Correct |
166 ms |
8540 KB |
Output is correct |
8 |
Correct |
165 ms |
8540 KB |
Output is correct |
9 |
Correct |
169 ms |
9352 KB |
Output is correct |
10 |
Correct |
167 ms |
8536 KB |
Output is correct |
11 |
Correct |
168 ms |
7512 KB |
Output is correct |
12 |
Correct |
164 ms |
7772 KB |
Output is correct |
13 |
Correct |
168 ms |
7772 KB |
Output is correct |
14 |
Correct |
168 ms |
7684 KB |
Output is correct |
15 |
Correct |
165 ms |
8280 KB |
Output is correct |
16 |
Correct |
164 ms |
9560 KB |
Output is correct |
17 |
Correct |
167 ms |
7772 KB |
Output is correct |
18 |
Correct |
172 ms |
8024 KB |
Output is correct |
19 |
Correct |
165 ms |
7768 KB |
Output is correct |
20 |
Correct |
165 ms |
8796 KB |
Output is correct |
21 |
Correct |
182 ms |
9304 KB |
Output is correct |
22 |
Incorrect |
160 ms |
8280 KB |
Output isn't correct |
23 |
Halted |
0 ms |
0 KB |
- |