#include <bits/stdc++.h>
using namespace std;
#define int int64_t
const int Z = 5e5, B = 26, MOD = 1e9+7;
signed main() {
ios::sync_with_stdio(0), cin.tie(0);
int N, M;
cin >> N >> M;
vector<int> g[N], h[N];
while(M--) {
int u, v; cin >> u >> v;
--u, --v;
if(u < v) g[u].push_back(v);
if(u > v) h[v].push_back(u);
}
int dp[N][B] {}, dpU[B] {}, dpD[B] {};
vector<int> sU, sD;
for(int i = N; i--; ) {
for(int j : g[i]) {
while(!empty(sU) && sU.back() <= j) {
for(int k = B; k--; ) (dpU[k] -= dp[sU.back()][k]) %= MOD;
sU.pop_back();
}
}
for(int j : h[i]) {
while(!empty(sD) && sD.back() <= j) {
for(int k = B; k--; ) (dpD[k] -= dp[sD.back()][k]) %= MOD;
sD.pop_back();
}
}
fill(dp[i], dp[i] + B, 1);
int sum = 0;
for(int k = 0; k < B; ++k) {
(dp[i][k] += sum) %= MOD;
sum += dpD[k];
}
sum = 0;
for(int k = B; k--; ) {
(dp[i][k] += sum) %= MOD;
sum += dpU[k];
}
for(int k = B; k--; ) {
(dpU[k] += dp[i][k]) %= MOD;
(dpD[k] += dp[i][k]) %= MOD;
}
sU.push_back(i);
sD.push_back(i);
}
int ans = accumulate(dp[0], dp[0] + B, int(0)) % MOD;
cout << (ans + MOD) % MOD;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
0 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
316 KB |
Output is correct |
| 5 |
Correct |
0 ms |
212 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
324 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
316 KB |
Output is correct |
| 12 |
Correct |
1 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
212 KB |
Output is correct |
| 14 |
Correct |
1 ms |
212 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
0 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
316 KB |
Output is correct |
| 5 |
Correct |
0 ms |
212 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
324 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
316 KB |
Output is correct |
| 12 |
Correct |
1 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
212 KB |
Output is correct |
| 14 |
Correct |
1 ms |
212 KB |
Output is correct |
| 15 |
Correct |
0 ms |
340 KB |
Output is correct |
| 16 |
Correct |
1 ms |
340 KB |
Output is correct |
| 17 |
Correct |
1 ms |
340 KB |
Output is correct |
| 18 |
Correct |
1 ms |
340 KB |
Output is correct |
| 19 |
Correct |
1 ms |
340 KB |
Output is correct |
| 20 |
Correct |
1 ms |
340 KB |
Output is correct |
| 21 |
Correct |
1 ms |
340 KB |
Output is correct |
| 22 |
Correct |
2 ms |
460 KB |
Output is correct |
| 23 |
Correct |
0 ms |
340 KB |
Output is correct |
| 24 |
Correct |
1 ms |
340 KB |
Output is correct |
| 25 |
Correct |
1 ms |
340 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
316 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
316 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
306 ms |
145196 KB |
Output is correct |
| 6 |
Correct |
303 ms |
146032 KB |
Output is correct |
| 7 |
Correct |
305 ms |
146252 KB |
Output is correct |
| 8 |
Correct |
312 ms |
146216 KB |
Output is correct |
| 9 |
Correct |
309 ms |
146224 KB |
Output is correct |
| 10 |
Correct |
13 ms |
6100 KB |
Output is correct |
| 11 |
Correct |
1 ms |
324 KB |
Output is correct |
| 12 |
Correct |
1 ms |
212 KB |
Output is correct |
| 13 |
Correct |
423 ms |
146116 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
0 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
316 KB |
Output is correct |
| 5 |
Correct |
0 ms |
212 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
324 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
316 KB |
Output is correct |
| 12 |
Correct |
1 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
212 KB |
Output is correct |
| 14 |
Correct |
1 ms |
212 KB |
Output is correct |
| 15 |
Correct |
0 ms |
340 KB |
Output is correct |
| 16 |
Correct |
1 ms |
340 KB |
Output is correct |
| 17 |
Correct |
1 ms |
340 KB |
Output is correct |
| 18 |
Correct |
1 ms |
340 KB |
Output is correct |
| 19 |
Correct |
1 ms |
340 KB |
Output is correct |
| 20 |
Correct |
1 ms |
340 KB |
Output is correct |
| 21 |
Correct |
1 ms |
340 KB |
Output is correct |
| 22 |
Correct |
2 ms |
460 KB |
Output is correct |
| 23 |
Correct |
0 ms |
340 KB |
Output is correct |
| 24 |
Correct |
1 ms |
340 KB |
Output is correct |
| 25 |
Correct |
1 ms |
340 KB |
Output is correct |
| 26 |
Correct |
12 ms |
5972 KB |
Output is correct |
| 27 |
Correct |
10 ms |
6100 KB |
Output is correct |
| 28 |
Correct |
10 ms |
6084 KB |
Output is correct |
| 29 |
Correct |
15 ms |
5972 KB |
Output is correct |
| 30 |
Correct |
14 ms |
6108 KB |
Output is correct |
| 31 |
Correct |
153 ms |
16536 KB |
Output is correct |
| 32 |
Correct |
13 ms |
6104 KB |
Output is correct |
| 33 |
Correct |
13 ms |
6100 KB |
Output is correct |
| 34 |
Correct |
14 ms |
6020 KB |
Output is correct |
| 35 |
Correct |
123 ms |
16076 KB |
Output is correct |
| 36 |
Correct |
7 ms |
5816 KB |
Output is correct |
| 37 |
Correct |
12 ms |
5872 KB |
Output is correct |
| 38 |
Correct |
11 ms |
5704 KB |
Output is correct |
| 39 |
Correct |
10 ms |
5528 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
0 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
316 KB |
Output is correct |
| 5 |
Correct |
0 ms |
212 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
324 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
316 KB |
Output is correct |
| 12 |
Correct |
1 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
212 KB |
Output is correct |
| 14 |
Correct |
1 ms |
212 KB |
Output is correct |
| 15 |
Correct |
0 ms |
340 KB |
Output is correct |
| 16 |
Correct |
1 ms |
340 KB |
Output is correct |
| 17 |
Correct |
1 ms |
340 KB |
Output is correct |
| 18 |
Correct |
1 ms |
340 KB |
Output is correct |
| 19 |
Correct |
1 ms |
340 KB |
Output is correct |
| 20 |
Correct |
1 ms |
340 KB |
Output is correct |
| 21 |
Correct |
1 ms |
340 KB |
Output is correct |
| 22 |
Correct |
2 ms |
460 KB |
Output is correct |
| 23 |
Correct |
0 ms |
340 KB |
Output is correct |
| 24 |
Correct |
1 ms |
340 KB |
Output is correct |
| 25 |
Correct |
1 ms |
340 KB |
Output is correct |
| 26 |
Correct |
1 ms |
316 KB |
Output is correct |
| 27 |
Correct |
1 ms |
212 KB |
Output is correct |
| 28 |
Correct |
1 ms |
316 KB |
Output is correct |
| 29 |
Correct |
1 ms |
212 KB |
Output is correct |
| 30 |
Correct |
306 ms |
145196 KB |
Output is correct |
| 31 |
Correct |
303 ms |
146032 KB |
Output is correct |
| 32 |
Correct |
305 ms |
146252 KB |
Output is correct |
| 33 |
Correct |
312 ms |
146216 KB |
Output is correct |
| 34 |
Correct |
309 ms |
146224 KB |
Output is correct |
| 35 |
Correct |
13 ms |
6100 KB |
Output is correct |
| 36 |
Correct |
1 ms |
324 KB |
Output is correct |
| 37 |
Correct |
1 ms |
212 KB |
Output is correct |
| 38 |
Correct |
423 ms |
146116 KB |
Output is correct |
| 39 |
Correct |
12 ms |
5972 KB |
Output is correct |
| 40 |
Correct |
10 ms |
6100 KB |
Output is correct |
| 41 |
Correct |
10 ms |
6084 KB |
Output is correct |
| 42 |
Correct |
15 ms |
5972 KB |
Output is correct |
| 43 |
Correct |
14 ms |
6108 KB |
Output is correct |
| 44 |
Correct |
153 ms |
16536 KB |
Output is correct |
| 45 |
Correct |
13 ms |
6104 KB |
Output is correct |
| 46 |
Correct |
13 ms |
6100 KB |
Output is correct |
| 47 |
Correct |
14 ms |
6020 KB |
Output is correct |
| 48 |
Correct |
123 ms |
16076 KB |
Output is correct |
| 49 |
Correct |
7 ms |
5816 KB |
Output is correct |
| 50 |
Correct |
12 ms |
5872 KB |
Output is correct |
| 51 |
Correct |
11 ms |
5704 KB |
Output is correct |
| 52 |
Correct |
10 ms |
5528 KB |
Output is correct |
| 53 |
Correct |
265 ms |
137324 KB |
Output is correct |
| 54 |
Correct |
237 ms |
140748 KB |
Output is correct |
| 55 |
Correct |
352 ms |
140212 KB |
Output is correct |
| 56 |
Correct |
363 ms |
144712 KB |
Output is correct |
| 57 |
Correct |
331 ms |
145532 KB |
Output is correct |
| 58 |
Correct |
306 ms |
143264 KB |
Output is correct |
| 59 |
Correct |
312 ms |
141220 KB |
Output is correct |
| 60 |
Correct |
413 ms |
140112 KB |
Output is correct |
| 61 |
Correct |
179 ms |
133152 KB |
Output is correct |
| 62 |
Correct |
384 ms |
139148 KB |
Output is correct |
| 63 |
Correct |
312 ms |
134764 KB |
Output is correct |
| 64 |
Correct |
252 ms |
130852 KB |
Output is correct |
