#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <cassert>
using namespace std;
using ll = long long;
const int MAXV = 63;
const ll MOD = 998244353;
ll f[MAXV][MAXV];
ll cnt_repeat[8];
ll dp[MAXV][MAXV][MAXV];
int to_int(char c) {
if ('a' <= c && c <= 'z')
return c - 'a';
if ('A' <= c && c <= 'Z')
return c - 'A' + 26;
return c - '0' + 52;
}
void get_edg(vector<string> v) {
for (int p = 0; p < MAXV; ++p) {
for (int q = 0; q < MAXV; ++q) {
f[p][q] = 0;
}
}
sort(v.begin(), v.end());
v.resize(unique(v.begin(), v.end()) - v.begin());
for (size_t i = 0; i < v.size(); ++i) {
int p = to_int(v[i][0]);
int q = to_int(v[i].back());
++f[p][q];
}
}
void get_dp() {
for (int a = 0; a < MAXV; ++a) for (int b = 0; b <= a; ++b) for (int c = 0; c <= b; ++c) {
dp[a][b][c] = 0;
for (int x = 0; x < MAXV; ++x) {
dp[a][b][c] += 1ll * f[a][x] * f[b][x] * f[c][x];
dp[a][b][c] %= MOD;
}
}
}
ll get_ans() {
ll ans = 0;
get_dp();
for (int a = 0; a < MAXV; ++a) for (int b = 0; b <= a; ++b) for (int c = 0; c <= b; ++c) for (int d = 0; d <= c; ++d) {
int rpat = int(a > b) + int(b > c) * 2 + int(c > d) * 4;
ans += dp[a][b][c] * dp[a][b][d] % MOD * dp[a][c][d] % MOD * dp[b][c][d] % MOD * cnt_repeat[rpat];
ans %= MOD;
}
return ans;
}
signed main() {
cnt_repeat[0] = 1;
cnt_repeat[1] = 4;
cnt_repeat[2] = 6;
cnt_repeat[3] = 12;
cnt_repeat[4] = 4;
cnt_repeat[5] = 12;
cnt_repeat[6] = 12;
cnt_repeat[7] = 24;
int n;
cin >> n;
vector<vector<string>> vals(11);
for (int i = 0; i < n; ++i) {
string s;
cin >> s;
vals[s.size()].push_back(s);
reverse(s.begin(), s.end());
vals[s.size()].push_back(s);
}
ll ans = 0;
for (int t = 0; t < 11; ++t) {
if (vals[t].empty())
continue;
get_edg(vals[t]);
ans += get_ans();
}
ans %= MOD;
cout << ans << '\n';
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
218 ms |
10356 KB |
Output is correct |
2 |
Correct |
208 ms |
10360 KB |
Output is correct |
3 |
Correct |
202 ms |
10368 KB |
Output is correct |
4 |
Correct |
194 ms |
10368 KB |
Output is correct |
5 |
Correct |
202 ms |
10472 KB |
Output is correct |
6 |
Correct |
210 ms |
10448 KB |
Output is correct |
7 |
Correct |
214 ms |
10356 KB |
Output is correct |
8 |
Correct |
205 ms |
10232 KB |
Output is correct |
9 |
Correct |
197 ms |
10368 KB |
Output is correct |
10 |
Correct |
209 ms |
10332 KB |
Output is correct |
11 |
Correct |
200 ms |
10432 KB |
Output is correct |
12 |
Correct |
226 ms |
10388 KB |
Output is correct |
13 |
Correct |
193 ms |
10348 KB |
Output is correct |
14 |
Correct |
210 ms |
10424 KB |
Output is correct |
15 |
Correct |
210 ms |
10384 KB |
Output is correct |
16 |
Correct |
194 ms |
10460 KB |
Output is correct |
17 |
Correct |
202 ms |
10324 KB |
Output is correct |
18 |
Correct |
203 ms |
10320 KB |
Output is correct |
19 |
Correct |
198 ms |
10460 KB |
Output is correct |
20 |
Correct |
210 ms |
10324 KB |
Output is correct |
21 |
Correct |
199 ms |
10228 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
218 ms |
10356 KB |
Output is correct |
2 |
Correct |
208 ms |
10360 KB |
Output is correct |
3 |
Correct |
202 ms |
10368 KB |
Output is correct |
4 |
Correct |
194 ms |
10368 KB |
Output is correct |
5 |
Correct |
202 ms |
10472 KB |
Output is correct |
6 |
Correct |
210 ms |
10448 KB |
Output is correct |
7 |
Correct |
214 ms |
10356 KB |
Output is correct |
8 |
Correct |
205 ms |
10232 KB |
Output is correct |
9 |
Correct |
197 ms |
10368 KB |
Output is correct |
10 |
Correct |
209 ms |
10332 KB |
Output is correct |
11 |
Correct |
200 ms |
10432 KB |
Output is correct |
12 |
Correct |
226 ms |
10388 KB |
Output is correct |
13 |
Correct |
193 ms |
10348 KB |
Output is correct |
14 |
Correct |
210 ms |
10424 KB |
Output is correct |
15 |
Correct |
210 ms |
10384 KB |
Output is correct |
16 |
Correct |
194 ms |
10460 KB |
Output is correct |
17 |
Correct |
202 ms |
10324 KB |
Output is correct |
18 |
Correct |
203 ms |
10320 KB |
Output is correct |
19 |
Correct |
198 ms |
10460 KB |
Output is correct |
20 |
Correct |
210 ms |
10324 KB |
Output is correct |
21 |
Correct |
199 ms |
10228 KB |
Output is correct |
22 |
Correct |
205 ms |
9212 KB |
Output is correct |
23 |
Correct |
208 ms |
9068 KB |
Output is correct |
24 |
Correct |
210 ms |
9088 KB |
Output is correct |
25 |
Correct |
205 ms |
9000 KB |
Output is correct |
26 |
Correct |
205 ms |
9156 KB |
Output is correct |
27 |
Correct |
199 ms |
8964 KB |
Output is correct |
28 |
Correct |
206 ms |
9032 KB |
Output is correct |
29 |
Correct |
194 ms |
9028 KB |
Output is correct |
30 |
Correct |
193 ms |
9064 KB |
Output is correct |
31 |
Correct |
195 ms |
9240 KB |
Output is correct |
32 |
Correct |
219 ms |
9052 KB |
Output is correct |
33 |
Correct |
194 ms |
9040 KB |
Output is correct |
34 |
Correct |
191 ms |
9084 KB |
Output is correct |
35 |
Correct |
196 ms |
9092 KB |
Output is correct |
36 |
Correct |
197 ms |
8864 KB |
Output is correct |
37 |
Correct |
203 ms |
9076 KB |
Output is correct |
38 |
Correct |
189 ms |
9060 KB |
Output is correct |
39 |
Correct |
191 ms |
9000 KB |
Output is correct |
40 |
Correct |
199 ms |
8924 KB |
Output is correct |
41 |
Correct |
196 ms |
9224 KB |
Output is correct |
42 |
Correct |
192 ms |
9072 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
218 ms |
10356 KB |
Output is correct |
2 |
Correct |
208 ms |
10360 KB |
Output is correct |
3 |
Correct |
202 ms |
10368 KB |
Output is correct |
4 |
Correct |
194 ms |
10368 KB |
Output is correct |
5 |
Correct |
202 ms |
10472 KB |
Output is correct |
6 |
Correct |
210 ms |
10448 KB |
Output is correct |
7 |
Correct |
214 ms |
10356 KB |
Output is correct |
8 |
Correct |
205 ms |
10232 KB |
Output is correct |
9 |
Correct |
197 ms |
10368 KB |
Output is correct |
10 |
Correct |
209 ms |
10332 KB |
Output is correct |
11 |
Correct |
200 ms |
10432 KB |
Output is correct |
12 |
Correct |
226 ms |
10388 KB |
Output is correct |
13 |
Correct |
193 ms |
10348 KB |
Output is correct |
14 |
Correct |
210 ms |
10424 KB |
Output is correct |
15 |
Correct |
210 ms |
10384 KB |
Output is correct |
16 |
Correct |
194 ms |
10460 KB |
Output is correct |
17 |
Correct |
202 ms |
10324 KB |
Output is correct |
18 |
Correct |
203 ms |
10320 KB |
Output is correct |
19 |
Correct |
198 ms |
10460 KB |
Output is correct |
20 |
Correct |
210 ms |
10324 KB |
Output is correct |
21 |
Correct |
199 ms |
10228 KB |
Output is correct |
22 |
Correct |
205 ms |
9212 KB |
Output is correct |
23 |
Correct |
208 ms |
9068 KB |
Output is correct |
24 |
Correct |
210 ms |
9088 KB |
Output is correct |
25 |
Correct |
205 ms |
9000 KB |
Output is correct |
26 |
Correct |
205 ms |
9156 KB |
Output is correct |
27 |
Correct |
199 ms |
8964 KB |
Output is correct |
28 |
Correct |
206 ms |
9032 KB |
Output is correct |
29 |
Correct |
194 ms |
9028 KB |
Output is correct |
30 |
Correct |
193 ms |
9064 KB |
Output is correct |
31 |
Correct |
195 ms |
9240 KB |
Output is correct |
32 |
Correct |
219 ms |
9052 KB |
Output is correct |
33 |
Correct |
194 ms |
9040 KB |
Output is correct |
34 |
Correct |
191 ms |
9084 KB |
Output is correct |
35 |
Correct |
196 ms |
9092 KB |
Output is correct |
36 |
Correct |
197 ms |
8864 KB |
Output is correct |
37 |
Correct |
203 ms |
9076 KB |
Output is correct |
38 |
Correct |
189 ms |
9060 KB |
Output is correct |
39 |
Correct |
191 ms |
9000 KB |
Output is correct |
40 |
Correct |
199 ms |
8924 KB |
Output is correct |
41 |
Correct |
196 ms |
9224 KB |
Output is correct |
42 |
Correct |
192 ms |
9072 KB |
Output is correct |
43 |
Correct |
199 ms |
8676 KB |
Output is correct |
44 |
Correct |
191 ms |
9476 KB |
Output is correct |
45 |
Correct |
207 ms |
9476 KB |
Output is correct |
46 |
Correct |
197 ms |
9488 KB |
Output is correct |
47 |
Correct |
191 ms |
9404 KB |
Output is correct |
48 |
Correct |
196 ms |
9488 KB |
Output is correct |
49 |
Correct |
190 ms |
9896 KB |
Output is correct |
50 |
Correct |
208 ms |
9852 KB |
Output is correct |
51 |
Correct |
201 ms |
9688 KB |
Output is correct |
52 |
Correct |
199 ms |
9544 KB |
Output is correct |
53 |
Correct |
197 ms |
9444 KB |
Output is correct |
54 |
Correct |
194 ms |
9496 KB |
Output is correct |
55 |
Correct |
191 ms |
9416 KB |
Output is correct |
56 |
Correct |
203 ms |
9536 KB |
Output is correct |
57 |
Correct |
199 ms |
9516 KB |
Output is correct |
58 |
Correct |
202 ms |
9412 KB |
Output is correct |
59 |
Correct |
200 ms |
9700 KB |
Output is correct |
60 |
Correct |
195 ms |
9904 KB |
Output is correct |
61 |
Correct |
197 ms |
9508 KB |
Output is correct |
62 |
Correct |
206 ms |
9688 KB |
Output is correct |
63 |
Correct |
199 ms |
9444 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
218 ms |
10356 KB |
Output is correct |
2 |
Correct |
208 ms |
10360 KB |
Output is correct |
3 |
Correct |
202 ms |
10368 KB |
Output is correct |
4 |
Correct |
194 ms |
10368 KB |
Output is correct |
5 |
Correct |
202 ms |
10472 KB |
Output is correct |
6 |
Correct |
210 ms |
10448 KB |
Output is correct |
7 |
Correct |
214 ms |
10356 KB |
Output is correct |
8 |
Correct |
205 ms |
10232 KB |
Output is correct |
9 |
Correct |
197 ms |
10368 KB |
Output is correct |
10 |
Correct |
209 ms |
10332 KB |
Output is correct |
11 |
Correct |
200 ms |
10432 KB |
Output is correct |
12 |
Correct |
226 ms |
10388 KB |
Output is correct |
13 |
Correct |
193 ms |
10348 KB |
Output is correct |
14 |
Correct |
210 ms |
10424 KB |
Output is correct |
15 |
Correct |
210 ms |
10384 KB |
Output is correct |
16 |
Correct |
194 ms |
10460 KB |
Output is correct |
17 |
Correct |
202 ms |
10324 KB |
Output is correct |
18 |
Correct |
203 ms |
10320 KB |
Output is correct |
19 |
Correct |
198 ms |
10460 KB |
Output is correct |
20 |
Correct |
210 ms |
10324 KB |
Output is correct |
21 |
Correct |
199 ms |
10228 KB |
Output is correct |
22 |
Correct |
205 ms |
9212 KB |
Output is correct |
23 |
Correct |
208 ms |
9068 KB |
Output is correct |
24 |
Correct |
210 ms |
9088 KB |
Output is correct |
25 |
Correct |
205 ms |
9000 KB |
Output is correct |
26 |
Correct |
205 ms |
9156 KB |
Output is correct |
27 |
Correct |
199 ms |
8964 KB |
Output is correct |
28 |
Correct |
206 ms |
9032 KB |
Output is correct |
29 |
Correct |
194 ms |
9028 KB |
Output is correct |
30 |
Correct |
193 ms |
9064 KB |
Output is correct |
31 |
Correct |
195 ms |
9240 KB |
Output is correct |
32 |
Correct |
219 ms |
9052 KB |
Output is correct |
33 |
Correct |
194 ms |
9040 KB |
Output is correct |
34 |
Correct |
191 ms |
9084 KB |
Output is correct |
35 |
Correct |
196 ms |
9092 KB |
Output is correct |
36 |
Correct |
197 ms |
8864 KB |
Output is correct |
37 |
Correct |
203 ms |
9076 KB |
Output is correct |
38 |
Correct |
189 ms |
9060 KB |
Output is correct |
39 |
Correct |
191 ms |
9000 KB |
Output is correct |
40 |
Correct |
199 ms |
8924 KB |
Output is correct |
41 |
Correct |
196 ms |
9224 KB |
Output is correct |
42 |
Correct |
192 ms |
9072 KB |
Output is correct |
43 |
Correct |
199 ms |
8676 KB |
Output is correct |
44 |
Correct |
191 ms |
9476 KB |
Output is correct |
45 |
Correct |
207 ms |
9476 KB |
Output is correct |
46 |
Correct |
197 ms |
9488 KB |
Output is correct |
47 |
Correct |
191 ms |
9404 KB |
Output is correct |
48 |
Correct |
196 ms |
9488 KB |
Output is correct |
49 |
Correct |
190 ms |
9896 KB |
Output is correct |
50 |
Correct |
208 ms |
9852 KB |
Output is correct |
51 |
Correct |
201 ms |
9688 KB |
Output is correct |
52 |
Correct |
199 ms |
9544 KB |
Output is correct |
53 |
Correct |
197 ms |
9444 KB |
Output is correct |
54 |
Correct |
194 ms |
9496 KB |
Output is correct |
55 |
Correct |
191 ms |
9416 KB |
Output is correct |
56 |
Correct |
203 ms |
9536 KB |
Output is correct |
57 |
Correct |
199 ms |
9516 KB |
Output is correct |
58 |
Correct |
202 ms |
9412 KB |
Output is correct |
59 |
Correct |
200 ms |
9700 KB |
Output is correct |
60 |
Correct |
195 ms |
9904 KB |
Output is correct |
61 |
Correct |
197 ms |
9508 KB |
Output is correct |
62 |
Correct |
206 ms |
9688 KB |
Output is correct |
63 |
Correct |
199 ms |
9444 KB |
Output is correct |
64 |
Correct |
193 ms |
9496 KB |
Output is correct |
65 |
Correct |
196 ms |
9400 KB |
Output is correct |
66 |
Correct |
192 ms |
9408 KB |
Output is correct |
67 |
Correct |
203 ms |
9660 KB |
Output is correct |
68 |
Correct |
190 ms |
9408 KB |
Output is correct |
69 |
Correct |
187 ms |
9784 KB |
Output is correct |
70 |
Correct |
218 ms |
9496 KB |
Output is correct |
71 |
Correct |
196 ms |
9368 KB |
Output is correct |
72 |
Correct |
191 ms |
9456 KB |
Output is correct |
73 |
Correct |
193 ms |
9428 KB |
Output is correct |
74 |
Correct |
201 ms |
9780 KB |
Output is correct |
75 |
Correct |
197 ms |
9744 KB |
Output is correct |
76 |
Correct |
202 ms |
9680 KB |
Output is correct |
77 |
Correct |
192 ms |
9584 KB |
Output is correct |
78 |
Correct |
191 ms |
9492 KB |
Output is correct |
79 |
Correct |
189 ms |
9416 KB |
Output is correct |
80 |
Correct |
202 ms |
9848 KB |
Output is correct |
81 |
Correct |
211 ms |
9708 KB |
Output is correct |
82 |
Correct |
207 ms |
9684 KB |
Output is correct |
83 |
Correct |
196 ms |
9852 KB |
Output is correct |
84 |
Correct |
189 ms |
9796 KB |
Output is correct |