# include <bits/stdc++.h>
using namespace std;
const int N = 1e5 + 2;
int n, m, q, d[N], used[N], vis[N];
vector <int> g[N];
int main(){
cin >> n >> m >> q;
for(int i = 0; i < m; i ++){
int u, v;
cin >> u >> v;
g[v].push_back(u);
}
while(q --){
int t, y;
cin >> t >> y;
vector <int> v;
for(int i = 1; i <= y; i ++){
int x;
cin >> x;
used[x] = 1;
v.push_back(x);
}
queue <int> q;
q.push(t);
memset(d, 0, sizeof(d));
memset(vis, 0, sizeof(vis));
vis[t] = 1;
int ans = -1;
while(!q.empty()){
int v = q.front();
q.pop();
for(int to : g[v]){
if(!vis[to])
q.push(to);
vis[to] = 1;
d[to] = max(d[v] + 1, d[to]);
}
}
for(int i = 1; i <= n; i ++){
if(!used[i] && vis[i]) ans = max(ans, d[i]);
}
cout << ans << endl;
for(int i : v)
used[i] = 0;
}
}
/**
5 6 1
1 2
2 4
3 4
1 3
3 5
4 5
5 2 2 3
**/
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
6 ms |
3448 KB |
Output is correct |
2 |
Correct |
6 ms |
3448 KB |
Output is correct |
3 |
Correct |
5 ms |
3520 KB |
Output is correct |
4 |
Correct |
6 ms |
3540 KB |
Output is correct |
5 |
Incorrect |
6 ms |
3744 KB |
Output isn't correct |
6 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
6 ms |
3448 KB |
Output is correct |
2 |
Correct |
6 ms |
3448 KB |
Output is correct |
3 |
Correct |
5 ms |
3520 KB |
Output is correct |
4 |
Correct |
6 ms |
3540 KB |
Output is correct |
5 |
Incorrect |
6 ms |
3744 KB |
Output isn't correct |
6 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
6 ms |
3448 KB |
Output is correct |
2 |
Correct |
6 ms |
3448 KB |
Output is correct |
3 |
Correct |
5 ms |
3520 KB |
Output is correct |
4 |
Correct |
6 ms |
3540 KB |
Output is correct |
5 |
Incorrect |
6 ms |
3744 KB |
Output isn't correct |
6 |
Halted |
0 ms |
0 KB |
- |