Submission #998924

#	Time	Username	Problem	Language	Result	Execution time	Memory
998924		envifly	Bitaro’s Party (JOI18_bitaro)	C++17	0 / 100	2 ms	5212 KiB

bitaro

#pragma GCC optimize("O3,unroll-loops")
#include <bits/stdc++.h>
#ifdef UwU
#include "C:\genshin_impact\keqing.cpp"
#else
#define debug(...) 0
#endif
using namespace std;
using ll = long long;
const int MOD = 1e9 + 7;
const int INF = 1e9;
const ll INFLL = 1e18;
 
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define pb push_back
#define FOR(i,a,b) for(int i = (a); i < (b); ++i)
#define FORE(i,a,b) for(int i = (a); i <= (b); ++i)
#define ROF(i,a,b) for(int i = (a); i >= (b); --i)
#define trav(a,x) for(auto& a: x)
#define sz(x) (int)x.size()
#define make_unique(v) sort(all(v)); v.erase(unique(all(v)), v.end())

template<class T> using minpq = priority_queue<T, vector<T>, greater<T>>;
template<class T> bool ckmin(T& a, const T& b){return b<a?a=b,1:0;}
template<class T> bool ckmax(T& a, const T& b){return a<b?a=b,1:0;}
template<int D, typename T>struct vt : public vector<vt<D - 1, T>> { template<typename... Args>
	vt(int n = 0, Args... args) : vector<vt<D - 1, T>>(n, vt<D - 1, T>(args...)) {}};
template<typename T> struct vt<1, T> : public vector<T> {
	vt(int n = 0, const T& val = T()) : vector<T>(n, val) {}};
template<typename T> istream& operator>>(istream& in, vector<T>& a) {for(auto &x : a) in >> x; return in;};
template<typename T> ostream& operator<<(ostream& out, vector<T>& a) {for(auto &x : a) out << x << ' '; return out;};

const int N = 1e5 + 5;

vector<int> g[N], rg[N];
void solve() {
	int n, m, q; cin >> n >> m >> q;
	FOR(i,0,m){
		int u, v; cin >> u >> v;
		--u; --v;
		g[u].pb(v);
		rg[v].pb(u);
	}
	while(q--){
		int x; cin >> x;
		--x;
		int c; cin >> c;
		vector<int> v(c);
		trav(i, v) cin >> i, --i;
		vector<bool> blocked(n);
		trav(i, v) blocked[i] = 1;
		vector<int> dp(n), deg(n);
		ROF(i,x,0) trav(j, rg[i]) deg[j]++;
		queue<int> q;
		q.push(x);
		while(!q.empty()){
			int f = q.front();
			q.pop();
			if(!deg[f]){
				trav(i, rg[f]){
					ckmax(dp[i], dp[f] + 1);
					--deg[i];
					if(!deg[i]) q.push(i);
				}
			}
		}
		int ans = -1;
		ROF(i,x,0) if(!blocked[i]) ckmax(ans, dp[i]);
		cout << ans << "\n";
	}
	
}

signed main() {
	cin.tie(0) -> sync_with_stdio(0);
	int t = 1;
	//cin >> t;
	for(int test = 1; test <= t; test++){
		solve();
	}
}

/*   /\_/\
*   (= ._.)
*   / >  \>
*/

Compilation message (stderr)

bitaro.cpp:86:9: warning: "/*" within comment [-Wcomment]
   86 | /*   /\_/\
      |

• Subtask 1: 0 / 7
• Subtask 2: 0 / 7
• Subtask 3: 0 / 86