#include <bits/stdc++.h>
typedef long long ll;
using namespace std;
const ll MOD = 998244353;
inline int id(char c) {
if (c >= 'a' && c <= 'z') return c - 'a';
if (c >= 'A' && c <= 'Z') return c - 'A' + 26;
return c - '0' + 52;
}
set<string> words[11];
ll cnt[62][62], dp[62][62][62], perm[8] = {24, 12, 12, 4, 12, 6, 4, 1};
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
int n;
cin >> n;
for (int i = 0; i < n; i++) {
string s;
cin >> s;
words[s.size()].insert(s);
reverse(s.begin(), s.end());
words[s.size()].insert(s);
}
ll ans = 0;
for (int l = 3; l < 11; l++) {
memset(cnt, 0, sizeof cnt);
memset(dp, 0, sizeof dp);
for (string i : words[l]) cnt[id(i[0])][id(i.back())]++;
for (int i = 0; i < 62; i++) {
for (int a = 0; a < 62; a++) {
for (int b = a; b < 62; b++) {
for (int c = b; c < 62; c++) {
dp[a][b][c] = (dp[a][b][c] + cnt[i][a] * cnt[i][b] % MOD * cnt[i][c] % MOD) % MOD;
}
}
}
}
for (int a = 0; a < 62; a++) {
for (int b = a; b < 62; b++) {
for (int c = b; c < 62; c++) {
for (int d = c; d < 62; d++) {
int mask = (a == b) << 2 | (b == c) << 1 | (c == d);
ans = (ans + dp[a][b][c] * dp[a][b][d] % MOD * dp[a][c][d] % MOD * dp[b][c][d] % MOD * perm[mask] % MOD) % MOD;
}
}
}
}
}
cout << ans;
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
346 ms |
16888 KB |
Output is correct |
2 |
Correct |
341 ms |
16888 KB |
Output is correct |
3 |
Correct |
351 ms |
17088 KB |
Output is correct |
4 |
Correct |
346 ms |
17020 KB |
Output is correct |
5 |
Correct |
367 ms |
17144 KB |
Output is correct |
6 |
Correct |
330 ms |
17016 KB |
Output is correct |
7 |
Correct |
329 ms |
17144 KB |
Output is correct |
8 |
Correct |
328 ms |
17016 KB |
Output is correct |
9 |
Correct |
342 ms |
17016 KB |
Output is correct |
10 |
Correct |
402 ms |
17020 KB |
Output is correct |
11 |
Correct |
343 ms |
17144 KB |
Output is correct |
12 |
Correct |
336 ms |
17144 KB |
Output is correct |
13 |
Correct |
328 ms |
17016 KB |
Output is correct |
14 |
Correct |
340 ms |
17016 KB |
Output is correct |
15 |
Correct |
329 ms |
17016 KB |
Output is correct |
16 |
Correct |
329 ms |
17044 KB |
Output is correct |
17 |
Correct |
335 ms |
16920 KB |
Output is correct |
18 |
Correct |
334 ms |
17100 KB |
Output is correct |
19 |
Correct |
324 ms |
17016 KB |
Output is correct |
20 |
Correct |
337 ms |
17016 KB |
Output is correct |
21 |
Correct |
325 ms |
16888 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
346 ms |
16888 KB |
Output is correct |
2 |
Correct |
341 ms |
16888 KB |
Output is correct |
3 |
Correct |
351 ms |
17088 KB |
Output is correct |
4 |
Correct |
346 ms |
17020 KB |
Output is correct |
5 |
Correct |
367 ms |
17144 KB |
Output is correct |
6 |
Correct |
330 ms |
17016 KB |
Output is correct |
7 |
Correct |
329 ms |
17144 KB |
Output is correct |
8 |
Correct |
328 ms |
17016 KB |
Output is correct |
9 |
Correct |
342 ms |
17016 KB |
Output is correct |
10 |
Correct |
402 ms |
17020 KB |
Output is correct |
11 |
Correct |
343 ms |
17144 KB |
Output is correct |
12 |
Correct |
336 ms |
17144 KB |
Output is correct |
13 |
Correct |
328 ms |
17016 KB |
Output is correct |
14 |
Correct |
340 ms |
17016 KB |
Output is correct |
15 |
Correct |
329 ms |
17016 KB |
Output is correct |
16 |
Correct |
329 ms |
17044 KB |
Output is correct |
17 |
Correct |
335 ms |
16920 KB |
Output is correct |
18 |
Correct |
334 ms |
17100 KB |
Output is correct |
19 |
Correct |
324 ms |
17016 KB |
Output is correct |
20 |
Correct |
337 ms |
17016 KB |
Output is correct |
21 |
Correct |
325 ms |
16888 KB |
Output is correct |
22 |
Correct |
330 ms |
17784 KB |
Output is correct |
23 |
Correct |
340 ms |
17656 KB |
Output is correct |
24 |
Correct |
329 ms |
17804 KB |
Output is correct |
25 |
Correct |
340 ms |
17656 KB |
Output is correct |
26 |
Correct |
346 ms |
17656 KB |
Output is correct |
27 |
Correct |
342 ms |
17656 KB |
Output is correct |
28 |
Correct |
333 ms |
17732 KB |
Output is correct |
29 |
Correct |
328 ms |
17680 KB |
Output is correct |
30 |
Correct |
338 ms |
17656 KB |
Output is correct |
31 |
Correct |
355 ms |
17656 KB |
Output is correct |
32 |
Correct |
341 ms |
17656 KB |
Output is correct |
33 |
Correct |
326 ms |
17660 KB |
Output is correct |
34 |
Correct |
322 ms |
17656 KB |
Output is correct |
35 |
Correct |
327 ms |
17660 KB |
Output is correct |
36 |
Correct |
325 ms |
17656 KB |
Output is correct |
37 |
Correct |
337 ms |
17656 KB |
Output is correct |
38 |
Correct |
324 ms |
17656 KB |
Output is correct |
39 |
Correct |
326 ms |
17704 KB |
Output is correct |
40 |
Correct |
318 ms |
17656 KB |
Output is correct |
41 |
Correct |
332 ms |
17708 KB |
Output is correct |
42 |
Correct |
321 ms |
17528 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
346 ms |
16888 KB |
Output is correct |
2 |
Correct |
341 ms |
16888 KB |
Output is correct |
3 |
Correct |
351 ms |
17088 KB |
Output is correct |
4 |
Correct |
346 ms |
17020 KB |
Output is correct |
5 |
Correct |
367 ms |
17144 KB |
Output is correct |
6 |
Correct |
330 ms |
17016 KB |
Output is correct |
7 |
Correct |
329 ms |
17144 KB |
Output is correct |
8 |
Correct |
328 ms |
17016 KB |
Output is correct |
9 |
Correct |
342 ms |
17016 KB |
Output is correct |
10 |
Correct |
402 ms |
17020 KB |
Output is correct |
11 |
Correct |
343 ms |
17144 KB |
Output is correct |
12 |
Correct |
336 ms |
17144 KB |
Output is correct |
13 |
Correct |
328 ms |
17016 KB |
Output is correct |
14 |
Correct |
340 ms |
17016 KB |
Output is correct |
15 |
Correct |
329 ms |
17016 KB |
Output is correct |
16 |
Correct |
329 ms |
17044 KB |
Output is correct |
17 |
Correct |
335 ms |
16920 KB |
Output is correct |
18 |
Correct |
334 ms |
17100 KB |
Output is correct |
19 |
Correct |
324 ms |
17016 KB |
Output is correct |
20 |
Correct |
337 ms |
17016 KB |
Output is correct |
21 |
Correct |
325 ms |
16888 KB |
Output is correct |
22 |
Correct |
330 ms |
17784 KB |
Output is correct |
23 |
Correct |
340 ms |
17656 KB |
Output is correct |
24 |
Correct |
329 ms |
17804 KB |
Output is correct |
25 |
Correct |
340 ms |
17656 KB |
Output is correct |
26 |
Correct |
346 ms |
17656 KB |
Output is correct |
27 |
Correct |
342 ms |
17656 KB |
Output is correct |
28 |
Correct |
333 ms |
17732 KB |
Output is correct |
29 |
Correct |
328 ms |
17680 KB |
Output is correct |
30 |
Correct |
338 ms |
17656 KB |
Output is correct |
31 |
Correct |
355 ms |
17656 KB |
Output is correct |
32 |
Correct |
341 ms |
17656 KB |
Output is correct |
33 |
Correct |
326 ms |
17660 KB |
Output is correct |
34 |
Correct |
322 ms |
17656 KB |
Output is correct |
35 |
Correct |
327 ms |
17660 KB |
Output is correct |
36 |
Correct |
325 ms |
17656 KB |
Output is correct |
37 |
Correct |
337 ms |
17656 KB |
Output is correct |
38 |
Correct |
324 ms |
17656 KB |
Output is correct |
39 |
Correct |
326 ms |
17704 KB |
Output is correct |
40 |
Correct |
318 ms |
17656 KB |
Output is correct |
41 |
Correct |
332 ms |
17708 KB |
Output is correct |
42 |
Correct |
321 ms |
17528 KB |
Output is correct |
43 |
Correct |
336 ms |
17528 KB |
Output is correct |
44 |
Correct |
327 ms |
17660 KB |
Output is correct |
45 |
Correct |
328 ms |
17656 KB |
Output is correct |
46 |
Correct |
323 ms |
17528 KB |
Output is correct |
47 |
Correct |
347 ms |
17656 KB |
Output is correct |
48 |
Correct |
338 ms |
17528 KB |
Output is correct |
49 |
Correct |
341 ms |
17636 KB |
Output is correct |
50 |
Correct |
347 ms |
17656 KB |
Output is correct |
51 |
Correct |
358 ms |
17528 KB |
Output is correct |
52 |
Correct |
354 ms |
17660 KB |
Output is correct |
53 |
Correct |
336 ms |
17656 KB |
Output is correct |
54 |
Correct |
337 ms |
17784 KB |
Output is correct |
55 |
Correct |
330 ms |
17528 KB |
Output is correct |
56 |
Correct |
335 ms |
17656 KB |
Output is correct |
57 |
Correct |
342 ms |
17656 KB |
Output is correct |
58 |
Correct |
342 ms |
17656 KB |
Output is correct |
59 |
Correct |
337 ms |
17636 KB |
Output is correct |
60 |
Correct |
329 ms |
17656 KB |
Output is correct |
61 |
Correct |
327 ms |
17632 KB |
Output is correct |
62 |
Correct |
362 ms |
17528 KB |
Output is correct |
63 |
Correct |
322 ms |
17528 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
346 ms |
16888 KB |
Output is correct |
2 |
Correct |
341 ms |
16888 KB |
Output is correct |
3 |
Correct |
351 ms |
17088 KB |
Output is correct |
4 |
Correct |
346 ms |
17020 KB |
Output is correct |
5 |
Correct |
367 ms |
17144 KB |
Output is correct |
6 |
Correct |
330 ms |
17016 KB |
Output is correct |
7 |
Correct |
329 ms |
17144 KB |
Output is correct |
8 |
Correct |
328 ms |
17016 KB |
Output is correct |
9 |
Correct |
342 ms |
17016 KB |
Output is correct |
10 |
Correct |
402 ms |
17020 KB |
Output is correct |
11 |
Correct |
343 ms |
17144 KB |
Output is correct |
12 |
Correct |
336 ms |
17144 KB |
Output is correct |
13 |
Correct |
328 ms |
17016 KB |
Output is correct |
14 |
Correct |
340 ms |
17016 KB |
Output is correct |
15 |
Correct |
329 ms |
17016 KB |
Output is correct |
16 |
Correct |
329 ms |
17044 KB |
Output is correct |
17 |
Correct |
335 ms |
16920 KB |
Output is correct |
18 |
Correct |
334 ms |
17100 KB |
Output is correct |
19 |
Correct |
324 ms |
17016 KB |
Output is correct |
20 |
Correct |
337 ms |
17016 KB |
Output is correct |
21 |
Correct |
325 ms |
16888 KB |
Output is correct |
22 |
Correct |
330 ms |
17784 KB |
Output is correct |
23 |
Correct |
340 ms |
17656 KB |
Output is correct |
24 |
Correct |
329 ms |
17804 KB |
Output is correct |
25 |
Correct |
340 ms |
17656 KB |
Output is correct |
26 |
Correct |
346 ms |
17656 KB |
Output is correct |
27 |
Correct |
342 ms |
17656 KB |
Output is correct |
28 |
Correct |
333 ms |
17732 KB |
Output is correct |
29 |
Correct |
328 ms |
17680 KB |
Output is correct |
30 |
Correct |
338 ms |
17656 KB |
Output is correct |
31 |
Correct |
355 ms |
17656 KB |
Output is correct |
32 |
Correct |
341 ms |
17656 KB |
Output is correct |
33 |
Correct |
326 ms |
17660 KB |
Output is correct |
34 |
Correct |
322 ms |
17656 KB |
Output is correct |
35 |
Correct |
327 ms |
17660 KB |
Output is correct |
36 |
Correct |
325 ms |
17656 KB |
Output is correct |
37 |
Correct |
337 ms |
17656 KB |
Output is correct |
38 |
Correct |
324 ms |
17656 KB |
Output is correct |
39 |
Correct |
326 ms |
17704 KB |
Output is correct |
40 |
Correct |
318 ms |
17656 KB |
Output is correct |
41 |
Correct |
332 ms |
17708 KB |
Output is correct |
42 |
Correct |
321 ms |
17528 KB |
Output is correct |
43 |
Correct |
336 ms |
17528 KB |
Output is correct |
44 |
Correct |
327 ms |
17660 KB |
Output is correct |
45 |
Correct |
328 ms |
17656 KB |
Output is correct |
46 |
Correct |
323 ms |
17528 KB |
Output is correct |
47 |
Correct |
347 ms |
17656 KB |
Output is correct |
48 |
Correct |
338 ms |
17528 KB |
Output is correct |
49 |
Correct |
341 ms |
17636 KB |
Output is correct |
50 |
Correct |
347 ms |
17656 KB |
Output is correct |
51 |
Correct |
358 ms |
17528 KB |
Output is correct |
52 |
Correct |
354 ms |
17660 KB |
Output is correct |
53 |
Correct |
336 ms |
17656 KB |
Output is correct |
54 |
Correct |
337 ms |
17784 KB |
Output is correct |
55 |
Correct |
330 ms |
17528 KB |
Output is correct |
56 |
Correct |
335 ms |
17656 KB |
Output is correct |
57 |
Correct |
342 ms |
17656 KB |
Output is correct |
58 |
Correct |
342 ms |
17656 KB |
Output is correct |
59 |
Correct |
337 ms |
17636 KB |
Output is correct |
60 |
Correct |
329 ms |
17656 KB |
Output is correct |
61 |
Correct |
327 ms |
17632 KB |
Output is correct |
62 |
Correct |
362 ms |
17528 KB |
Output is correct |
63 |
Correct |
322 ms |
17528 KB |
Output is correct |
64 |
Correct |
331 ms |
17920 KB |
Output is correct |
65 |
Correct |
327 ms |
17784 KB |
Output is correct |
66 |
Correct |
327 ms |
18084 KB |
Output is correct |
67 |
Correct |
323 ms |
17872 KB |
Output is correct |
68 |
Correct |
327 ms |
17784 KB |
Output is correct |
69 |
Correct |
329 ms |
17872 KB |
Output is correct |
70 |
Correct |
332 ms |
17912 KB |
Output is correct |
71 |
Correct |
328 ms |
17912 KB |
Output is correct |
72 |
Correct |
326 ms |
17784 KB |
Output is correct |
73 |
Correct |
334 ms |
17784 KB |
Output is correct |
74 |
Correct |
383 ms |
17784 KB |
Output is correct |
75 |
Correct |
380 ms |
17952 KB |
Output is correct |
76 |
Correct |
338 ms |
17784 KB |
Output is correct |
77 |
Correct |
346 ms |
17780 KB |
Output is correct |
78 |
Correct |
335 ms |
17852 KB |
Output is correct |
79 |
Correct |
340 ms |
17784 KB |
Output is correct |
80 |
Correct |
325 ms |
17912 KB |
Output is correct |
81 |
Correct |
333 ms |
18040 KB |
Output is correct |
82 |
Correct |
329 ms |
17912 KB |
Output is correct |
83 |
Correct |
332 ms |
17912 KB |
Output is correct |
84 |
Correct |
326 ms |
17784 KB |
Output is correct |