#include "bits/stdc++.h"
using namespace std;
#ifdef Nero
#include "Deb.h"
#else
#define debug(...)
#endif
const int A = 26;
const int N = 5e5 + 5;
const int md = (int) 1e9 + 7;
int dp[N][A];
int ps[N][A];
vector<int> smaller[N], bigger[N];
int sub(int a, int b) {
a -= b;
if (a < 0) a += md;
return a;
}
void add(int& a, int b) {
a += b;
if (a >= md) a -= md;
}
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int n, m;
cin >> n >> m;
for (int i = 0; i < m; ++i) {
int a, b;
cin >> a >> b;
if (a < b) {
smaller[a].push_back(a);//1
smaller[b].push_back(-a);//1
} else {
bigger[b].push_back(b);//2
bigger[a].push_back(-b);//2
}
}
for (int i = 0; i < A; ++i) {
dp[1][i] = 1;
}
vector<multiset<int>> se(3);
for (int i = 1; i <= n; ++i) {
int mx1 = 0, mx2 = 0;
if (!se[1].empty()) mx1 = max(0, *se[1].rbegin());
if (!se[2].empty()) mx2 = max(0, *se[2].rbegin());
int mx = max(mx1, mx2);
int mn = min(mx1, mx2);
for (int j = 0; j < A; ++j) {
for (int l = 0; l < A; ++l) {
if (l == j) continue;
int s = sub(ps[i - 1][l], ps[mx][l]);
add(dp[i][j], s);
int st = (mx1 == mx ? 1 : 0) | (mx2 == mx ? 2 : 0);
s = sub(ps[mx][l], ps[mn][l]);
add(dp[i][j], s * (st & 1 ? l < j: 1) * (st & 2 ? l > j : 1));
}
}
for (int x : smaller[i]) {
if (x > 0) se[1].insert(x);
else se[1].erase(se[1].find(-x));
}
for (int x : bigger[i]) {
if (x > 0) se[2].insert(x);
else se[2].erase(se[2].find(-x));
}
for (int j = 0; j < A; ++j) {
ps[i][j] = ps[i - 1][j];
add(ps[i][j], dp[i][j]);
}
}
int ans = 0;
for (int i = 1; i <= n; ++i) {
for (int j = 0; j < A; ++j) {
add(ans, dp[i][j]);
}
}
cout << ans << '\n';
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
11 ms |
27228 KB |
Output is correct |
2 |
Correct |
7 ms |
27228 KB |
Output is correct |
3 |
Correct |
8 ms |
27228 KB |
Output is correct |
4 |
Correct |
8 ms |
27228 KB |
Output is correct |
5 |
Correct |
6 ms |
27312 KB |
Output is correct |
6 |
Correct |
6 ms |
27228 KB |
Output is correct |
7 |
Correct |
6 ms |
27228 KB |
Output is correct |
8 |
Correct |
7 ms |
27228 KB |
Output is correct |
9 |
Correct |
6 ms |
27228 KB |
Output is correct |
10 |
Correct |
7 ms |
27280 KB |
Output is correct |
11 |
Correct |
6 ms |
27228 KB |
Output is correct |
12 |
Correct |
6 ms |
27228 KB |
Output is correct |
13 |
Correct |
6 ms |
27084 KB |
Output is correct |
14 |
Correct |
6 ms |
27228 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
11 ms |
27228 KB |
Output is correct |
2 |
Correct |
7 ms |
27228 KB |
Output is correct |
3 |
Correct |
8 ms |
27228 KB |
Output is correct |
4 |
Correct |
8 ms |
27228 KB |
Output is correct |
5 |
Correct |
6 ms |
27312 KB |
Output is correct |
6 |
Correct |
6 ms |
27228 KB |
Output is correct |
7 |
Correct |
6 ms |
27228 KB |
Output is correct |
8 |
Correct |
7 ms |
27228 KB |
Output is correct |
9 |
Correct |
6 ms |
27228 KB |
Output is correct |
10 |
Correct |
7 ms |
27280 KB |
Output is correct |
11 |
Correct |
6 ms |
27228 KB |
Output is correct |
12 |
Correct |
6 ms |
27228 KB |
Output is correct |
13 |
Correct |
6 ms |
27084 KB |
Output is correct |
14 |
Correct |
6 ms |
27228 KB |
Output is correct |
15 |
Correct |
6 ms |
27228 KB |
Output is correct |
16 |
Correct |
7 ms |
27228 KB |
Output is correct |
17 |
Correct |
6 ms |
27272 KB |
Output is correct |
18 |
Correct |
7 ms |
27228 KB |
Output is correct |
19 |
Correct |
8 ms |
27488 KB |
Output is correct |
20 |
Correct |
7 ms |
27320 KB |
Output is correct |
21 |
Correct |
6 ms |
27228 KB |
Output is correct |
22 |
Correct |
9 ms |
27480 KB |
Output is correct |
23 |
Correct |
6 ms |
27228 KB |
Output is correct |
24 |
Correct |
6 ms |
27228 KB |
Output is correct |
25 |
Correct |
7 ms |
27236 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
7 ms |
27228 KB |
Output is correct |
2 |
Correct |
6 ms |
27228 KB |
Output is correct |
3 |
Correct |
6 ms |
27228 KB |
Output is correct |
4 |
Correct |
6 ms |
27228 KB |
Output is correct |
5 |
Correct |
1302 ms |
141176 KB |
Output is correct |
6 |
Correct |
1260 ms |
148104 KB |
Output is correct |
7 |
Correct |
1248 ms |
147764 KB |
Output is correct |
8 |
Correct |
1260 ms |
147996 KB |
Output is correct |
9 |
Correct |
1297 ms |
147776 KB |
Output is correct |
10 |
Correct |
58 ms |
30292 KB |
Output is correct |
11 |
Correct |
7 ms |
27480 KB |
Output is correct |
12 |
Correct |
6 ms |
27228 KB |
Output is correct |
13 |
Correct |
1783 ms |
170156 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
11 ms |
27228 KB |
Output is correct |
2 |
Correct |
7 ms |
27228 KB |
Output is correct |
3 |
Correct |
8 ms |
27228 KB |
Output is correct |
4 |
Correct |
8 ms |
27228 KB |
Output is correct |
5 |
Correct |
6 ms |
27312 KB |
Output is correct |
6 |
Correct |
6 ms |
27228 KB |
Output is correct |
7 |
Correct |
6 ms |
27228 KB |
Output is correct |
8 |
Correct |
7 ms |
27228 KB |
Output is correct |
9 |
Correct |
6 ms |
27228 KB |
Output is correct |
10 |
Correct |
7 ms |
27280 KB |
Output is correct |
11 |
Correct |
6 ms |
27228 KB |
Output is correct |
12 |
Correct |
6 ms |
27228 KB |
Output is correct |
13 |
Correct |
6 ms |
27084 KB |
Output is correct |
14 |
Correct |
6 ms |
27228 KB |
Output is correct |
15 |
Correct |
6 ms |
27228 KB |
Output is correct |
16 |
Correct |
7 ms |
27228 KB |
Output is correct |
17 |
Correct |
6 ms |
27272 KB |
Output is correct |
18 |
Correct |
7 ms |
27228 KB |
Output is correct |
19 |
Correct |
8 ms |
27488 KB |
Output is correct |
20 |
Correct |
7 ms |
27320 KB |
Output is correct |
21 |
Correct |
6 ms |
27228 KB |
Output is correct |
22 |
Correct |
9 ms |
27480 KB |
Output is correct |
23 |
Correct |
6 ms |
27228 KB |
Output is correct |
24 |
Correct |
6 ms |
27228 KB |
Output is correct |
25 |
Correct |
7 ms |
27236 KB |
Output is correct |
26 |
Correct |
55 ms |
30040 KB |
Output is correct |
27 |
Correct |
56 ms |
30204 KB |
Output is correct |
28 |
Correct |
55 ms |
30308 KB |
Output is correct |
29 |
Correct |
61 ms |
30836 KB |
Output is correct |
30 |
Correct |
71 ms |
30756 KB |
Output is correct |
31 |
Correct |
275 ms |
42240 KB |
Output is correct |
32 |
Correct |
56 ms |
30288 KB |
Output is correct |
33 |
Correct |
56 ms |
30292 KB |
Output is correct |
34 |
Correct |
63 ms |
31244 KB |
Output is correct |
35 |
Correct |
414 ms |
52712 KB |
Output is correct |
36 |
Correct |
51 ms |
29524 KB |
Output is correct |
37 |
Correct |
63 ms |
30640 KB |
Output is correct |
38 |
Correct |
57 ms |
30436 KB |
Output is correct |
39 |
Correct |
58 ms |
30032 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
11 ms |
27228 KB |
Output is correct |
2 |
Correct |
7 ms |
27228 KB |
Output is correct |
3 |
Correct |
8 ms |
27228 KB |
Output is correct |
4 |
Correct |
8 ms |
27228 KB |
Output is correct |
5 |
Correct |
6 ms |
27312 KB |
Output is correct |
6 |
Correct |
6 ms |
27228 KB |
Output is correct |
7 |
Correct |
6 ms |
27228 KB |
Output is correct |
8 |
Correct |
7 ms |
27228 KB |
Output is correct |
9 |
Correct |
6 ms |
27228 KB |
Output is correct |
10 |
Correct |
7 ms |
27280 KB |
Output is correct |
11 |
Correct |
6 ms |
27228 KB |
Output is correct |
12 |
Correct |
6 ms |
27228 KB |
Output is correct |
13 |
Correct |
6 ms |
27084 KB |
Output is correct |
14 |
Correct |
6 ms |
27228 KB |
Output is correct |
15 |
Correct |
6 ms |
27228 KB |
Output is correct |
16 |
Correct |
7 ms |
27228 KB |
Output is correct |
17 |
Correct |
6 ms |
27272 KB |
Output is correct |
18 |
Correct |
7 ms |
27228 KB |
Output is correct |
19 |
Correct |
8 ms |
27488 KB |
Output is correct |
20 |
Correct |
7 ms |
27320 KB |
Output is correct |
21 |
Correct |
6 ms |
27228 KB |
Output is correct |
22 |
Correct |
9 ms |
27480 KB |
Output is correct |
23 |
Correct |
6 ms |
27228 KB |
Output is correct |
24 |
Correct |
6 ms |
27228 KB |
Output is correct |
25 |
Correct |
7 ms |
27236 KB |
Output is correct |
26 |
Correct |
7 ms |
27228 KB |
Output is correct |
27 |
Correct |
6 ms |
27228 KB |
Output is correct |
28 |
Correct |
6 ms |
27228 KB |
Output is correct |
29 |
Correct |
6 ms |
27228 KB |
Output is correct |
30 |
Correct |
1302 ms |
141176 KB |
Output is correct |
31 |
Correct |
1260 ms |
148104 KB |
Output is correct |
32 |
Correct |
1248 ms |
147764 KB |
Output is correct |
33 |
Correct |
1260 ms |
147996 KB |
Output is correct |
34 |
Correct |
1297 ms |
147776 KB |
Output is correct |
35 |
Correct |
58 ms |
30292 KB |
Output is correct |
36 |
Correct |
7 ms |
27480 KB |
Output is correct |
37 |
Correct |
6 ms |
27228 KB |
Output is correct |
38 |
Correct |
1783 ms |
170156 KB |
Output is correct |
39 |
Correct |
55 ms |
30040 KB |
Output is correct |
40 |
Correct |
56 ms |
30204 KB |
Output is correct |
41 |
Correct |
55 ms |
30308 KB |
Output is correct |
42 |
Correct |
61 ms |
30836 KB |
Output is correct |
43 |
Correct |
71 ms |
30756 KB |
Output is correct |
44 |
Correct |
275 ms |
42240 KB |
Output is correct |
45 |
Correct |
56 ms |
30288 KB |
Output is correct |
46 |
Correct |
56 ms |
30292 KB |
Output is correct |
47 |
Correct |
63 ms |
31244 KB |
Output is correct |
48 |
Correct |
414 ms |
52712 KB |
Output is correct |
49 |
Correct |
51 ms |
29524 KB |
Output is correct |
50 |
Correct |
63 ms |
30640 KB |
Output is correct |
51 |
Correct |
57 ms |
30436 KB |
Output is correct |
52 |
Correct |
58 ms |
30032 KB |
Output is correct |
53 |
Correct |
1339 ms |
144036 KB |
Output is correct |
54 |
Correct |
1377 ms |
143888 KB |
Output is correct |
55 |
Correct |
1587 ms |
157276 KB |
Output is correct |
56 |
Correct |
1641 ms |
157472 KB |
Output is correct |
57 |
Correct |
1269 ms |
148028 KB |
Output is correct |
58 |
Correct |
1295 ms |
147956 KB |
Output is correct |
59 |
Correct |
1264 ms |
147872 KB |
Output is correct |
60 |
Correct |
1808 ms |
163884 KB |
Output is correct |
61 |
Correct |
1136 ms |
125744 KB |
Output is correct |
62 |
Correct |
1598 ms |
156400 KB |
Output is correct |
63 |
Correct |
1412 ms |
147368 KB |
Output is correct |
64 |
Correct |
1336 ms |
137092 KB |
Output is correct |