Submission #220899

#	Time	Username	Problem	Language	Result	Execution time	Memory
220899		dorijanlendvaj	Bitaro’s Party (JOI18_bitaro)	C++14	100 / 100	1125 ms	94192 KiB

bitaro

//DUEL
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#define x first
#define y second
#define pii pair<int,int>
#define pb push_back
#define eb emplace_back
#pragma GCC optimize("unroll-loops")
#define shandom_ruffle(a, b) shuffle(a, b, rng)
#define vi vector<int>
#define vl vector<ll>
#define popcnt __builtin_popcount
#define popcntll __builtin_popcountll
#define all(a) begin(a),end(a)

using namespace std;
using namespace __gnu_pbds;

using ll=long long;
using ull=unsigned long long;
using ld=long double;
int MOD=1000000007;
int MOD2=998244353;
vector<int> bases;
const ll LLINF=1ll<<60;
const char en='\n';

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
void yes() {cout<<"YES"<<en; exit(0);}
void no() {cout<<"NO"<<en; exit(0);}
inline int rund() {int x576363482791fuweh=rng();return abs(x576363482791fuweh)%RAND_MAX;}
template<class T>
void prVec(vector<T> w,bool fl=false)
{
	cout<<w.size()<<en;
	for (int i=0;i<int(w.size())-1;++i) cout<<w[i]<<' ';
	if (w.size()) cout<<w[w.size()-1]<<en;
	if (fl) cout<<flush;
}

void M998()
{
	swap(MOD,MOD2);
}

ll raand()
{
	ll a=rund();
	a*=RAND_MAX;
	a+=rund();
    return a;
}

#define rand raand

ll raaand()
{
	return raand()*(MOD-7)+raand();
}

string to_upper(string a)
{
	for (int i=0;i<(int)a.size();++i) if (a[i]>='a' && a[i]<='z') a[i]-='a'-'A';
	return a;
}

string to_lower(string a)
{
	for (int i=0;i<(int)a.size();++i) if (a[i]>='A' && a[i]<='Z') a[i]+='a'-'A';
	return a;
}

ll sti(string a,int base=10)
{
	ll k=0;
	for (int i=0;i<(int)a.size();++i)
	{
		k*=base;
		k+=a[i]-'0';
	}
	return k;
}

template<class T>
void eras(vector<T>& a,T b)
{
	a.erase(find(a.begin(),a.end(),b));
}

string its(ll k,int base=10)
{
	if (k==0) return "0";
	string a;
	while (k)
	{
		a.push_back((k%base)+'0');
		k/=base;
	}
	reverse(a.begin(),a.end());
	return a;
}

ll min(ll a,int b)
{
	if (a<b) return a;
	return b;
}

ll min(int a,ll b)
{
	if (a<b) return a;
	return b;
}

ll max(ll a,int b)
{
	if (a>b) return a;
	return b;
}

ll max(int a,ll b)
{
	if (a>b) return a;
	return b;
}

ll gcd(ll a,ll b)
{
	if (b==0) return a;
	return gcd(b,a%b);
}

ll lcm(ll a,ll b)
{
	return a/gcd(a,b)*b;
}

template<class T,class K>
pair<T,K> mp(T a,K b)
{
	return make_pair(a,b);
}

inline int mult(ll a,ll b)
{
	return (a*b)%MOD;
}

inline int pot(int n,int k)
{
	if (k==0) return 1;
	ll a=pot(n,k/2);
	a=mult(a,a);
	if (k%2) return mult(a,n);
	else return a;
}

int divide(int a,int b)
{
	return mult(a,pot(b,MOD-2));
}

inline int sub(int a,int b)
{
	if (a-b>=0) return a-b;
	return a-b+MOD;
}

inline int add(int a,int b)
{
	if (a+b>=MOD) return a+b-MOD;
	return a+b;
}

bool prime(ll a)
{
	if (a==1) return 0;
	for (int i=2;i<=round(sqrt(a));++i)
	{
		if (a%i==0) return 0;
	}
	return 1;
}

const int N=100010,M=1<<17,C=100;
int n,m,q,dp[N];
vi ord,ch[N];
ll re[N][C+10];
int id[N],sz[N];
bool bio[N];
vi sta;

void mer(int i,int j)
{
	int cn=0,a=0,b=0;
	while (a+b!=sz[i]+sz[j] && cn<C)
	{
		if (a==sz[i])
		{
			if (!bio[re[j][b]%M]) re[N-1][cn++]=re[j][b]+M,bio[re[j][b]%M]=1;
			++b;
			continue;
		}
		if (b==sz[j])
		{
			if (!bio[re[i][a]%M]) re[N-1][cn++]=re[i][a],bio[re[i][a]%M]=1;
			++a;
			continue;
		}
		if (re[i][a]>re[j][b]+M)
		{
			if (!bio[re[i][a]%M]) re[N-1][cn++]=re[i][a],bio[re[i][a]%M]=1;
			++a;
			continue;
		}
		if (!bio[re[j][b]%M]) re[N-1][cn++]=re[j][b]+M,bio[re[j][b]%M]=1;
		++b;
	}
	sz[i]=cn;
	for (int u=0;u<cn;++u) re[i][u]=re[N-1][u],bio[re[N-1][u]%M]=0;
}

void dfs(int i)
{
	if (id[i]) return;
	--id[i];
	ord.pb(i);
	for (auto a: ch[i])
	{
		--id[a];
		dfs(a);
	}
}

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	for (int i=0;i<10;++i) bases.push_back(rand()%(MOD-13893829*2)[phone]);
	cin>>n>>m>>q;
	for (int i=0;i<m;++i)
	{
		int a,b;
		cin>>b>>a;
		ch[a].pb(b);
		++id[b];
	}
	for (int i=1;i<=n;++i) dfs(i),sz[i]=1,re[i][0]=i;
	reverse(all(ord));
	for (auto a: ord) for (auto b: ch[a]) mer(a,b);
	/*for (int i=1;i<=n;++i)
	{
		cout<<sz[i]<<en;
		for (int j=0;j<sz[i];++j) cout<<re[i][j]%M<<' '<<re[i][j]/M<<en;
		cout<<en;
	}*/
	while (q--)
	{
		int cn,i;
		vi v;
		cin>>i>>cn;
		while (cn--)
		{
			int x;
			cin>>x;
			v.pb(x);
			bio[x]=1;
		}
		bool don=0;
		for (int u=0;u<sz[i];++u) if (!bio[re[i][u]%M])
		{
			cout<<re[i][u]/M<<en;
			for (auto a: v) bio[a]=0;
			don=1;
			break;
		}
		if (don) continue;
		if (sz[i]<C)
		{
			cout<<-1<<en;
			for (auto a: v) bio[a]=0;
			continue;
		}
		memset(dp,0,sizeof(dp));
		for (auto a: v) dp[a]=-MOD;
		for (auto a: ord) for (auto b: ch[a]) dp[a]=max(dp[a],dp[b]+1);
		for (auto a: v) bio[a]=0;
		if (dp[i]>=0) cout<<dp[i]<<en;
		else cout<<-1<<en;
	}
}

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