Submission #1101644

#	Time	Username	Problem	Language	Result	Execution time	Memory
1101644		Nurislam	Bitaro’s Party (JOI18_bitaro)	C++17	0 / 100	1 ms	336 KiB

bitaro

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define ff first
#define ss second
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define int long long
template <class F, class _S>
bool chmin(F &u, const _S &v){
	bool flag = false;
	if ( u > v ){
		u = v; flag |= true;
	}
	return flag;
}

template <class F, class _S>
bool chmax(F &u, const _S &v){
	bool flag = false;
	if ( u < v ){
		u = v; flag |= true;
	}
	return flag;
}

const int N = (1<<18) +1, inf = 1e17+200;
//int mod = 998244353;
//int mod = 1000000007;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
#define rnd(l, r) uniform_int_distribution <int> (l, r)(rng)

signed main(){
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);cout.tie(nullptr);
    int n, m, q;
    cin >> n >> m >> q;
    vector<vector<int>> g(n+1);
    for(int i = 0; i < m; i++){
		int u, v;
		cin >> u >> v;
		g[v].pb(u);
	}
	vector<int> vis(n+1);
	int ans = 0;
	auto calc = [&](int ps)-> void{
		set<int> vs;
		vector<int> ds(n+1, 0);
		queue<int> q;
		q.push(ps);
		while(q.size()){
			auto p = q.front();
			q.pop();
			if(vs.count(p))continue;
			vs.insert(p);
			for(auto to:g[p]){
				if(chmax(ds[to], ds[p]+1))q.push(to);
			}
		}
		for(int i = 1; i <= n; i++){
			if(!vis[i])chmax(ans, ds[i]);
		}
	};
	
	while(q--){
		ans = 0;
		int x, sz;
		cin >> x >> sz;
		vector<int> ar(sz);
		for(int &i:ar)cin >> i;
		for(int i:ar)vis[i] = 1;
		calc(x);
		for(int i:ar)vis[i] = 0;
		cout << ans << '\n';
	}
}

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