#include<bits/stdc++.h>
using namespace std;
const int N = 1e6 + 1 , mod = 1e9 + 7;
vector<int> g[N] , r[N] , E(N);
inline void read(int &x){
char c;int f=1;
while(!isdigit(c=getchar()))if(c=='-')f=-1;
x=(c&15);while(isdigit(c=getchar()))x=(x<<1)+(x<<3)+(c&15);
x*=f;
}
int main(){
int n , m , p;
read(n);
read(m);
read(p);
vector<int> x(p + 1);
for(int i = 1;i <= p;i ++){
read(x[i]);
}
if(x.back() != n){
x.emplace_back(n);
}
for(int i = 1;i <= m;i ++){
int u , v;
read(u);
read(v);
E[v]++;
g[u].emplace_back(v);
r[v].emplace_back(u);
}
queue<int> q;
for(int i = 1;i <= n;i ++){
if(E[i] == 0){
q.push(i);
}
}
vector<int> order;
while((int)q.size()){
int u = q.front();
q.pop();
order.emplace_back(u);
for(int v : g[u]){
if(--E[v] == 0){
q.push(v);
}
}
}
int pos = 1 , L = 0;
vector<long long> dp(n);
for(int i = 0;i < n;i ++){
int v = order[i];
if(v == 1){
dp[v] = 1;
}
for(int u : r[order[i]]){
dp[v] = (dp[v] + dp[u]) % mod;
}
if(v == x[pos]){
for(int j = L;j < i;j ++){
dp[order[j]] = 0;
}
L = i + 1;
++pos;
}
}
cout << dp[x.back()] << endl;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
9 ms |
51292 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
9 ms |
51292 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
9 ms |
51292 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
9 ms |
51292 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |