Submission #600948

#	Time	Username	Problem	Language	Result	Execution time	Memory
600948		Arnch	Viruses (BOI20_viruses)	C++17	0 / 100	136 ms	262144 KiB

Viruses

// oooo
/*
 har chi delet mikhad bebar ~
 gitar o ba khodet nabar! ~
 ;Amoo_Hasan;
*/

#include<bits/stdc++.h>
//#pragma GCC optimize("O3,no-stack-protector,unroll-loops")
//#pragma GCC target("avx2,fma")

using namespace std;

typedef long long ll;
typedef long double ld;

#define Sz(x) int((x).size())
#define All(x) (x).begin(), (x).end()
#define wtf(x) cout<<#x <<" : " <<x <<endl

constexpr ll inf = 1e18, N = 1e3 + 10, mod = 1e9 + 9, pr = 1000696969;

ll dp[N];
string s[N];
bool mark[N], ex[N];
map<int, bool> mp;
vector<int> ind[N], val[N];

void dojob(int x) {
	int pos = ind[x][0];
	for(auto j : val[pos]) {
		if(!mark[j]) dojob(j);
		if(ex[j]) {
			ex[x] = 1;
			break;
		}
		s[x] += s[j];
	}
	mark[x] = 1;
}

int main() {
    ios :: sync_with_stdio(0), cin.tie(0);
    
	int g, n, m; cin >>g >>n >>m;
	for(int i = 0; i < n; i++) {
		int a, k; cin >>a >>k;
		for(int j = 0; j < k; j++) {
			int u; cin >>u;
			val[i].push_back(u);
		}
		ind[a].push_back(i);
	}
	for(int i = 0; i < m; i++) {
		int e; cin >>e;
		ll cur = 0;
		for(int j = 0; j < e; j++) {
			int u; cin >>u;
			if(u == 0) cur *= pr, cur += 1, cur %= mod;
			else cur *= pr, cur += 2, cur %= mod;
		}
		mp[cur] = 1;
	}

	assert(n == g - 2);

	s[0] = '0', s[1] = '1';
	mark[0] = mark[1] = 1;
	
	for(int i = 2; i < g; i++) {
		if(!mark[i]) dojob(i);
	}

	for(int j = 2; j < g; j++) {
		if(ex[j]) {
			cout<<"YES" <<endl;
			continue;
		}
		string ans = s[j];
		for(int i = 0; i < Sz(ans); i++) {
			ll cur = 0;
			bool rip = 0;
			for(int j = i; j < Sz(ans); j++) {
				cur *= pr;
				if(ans[j] == '0') cur += 1;
				else cur += 2;
				cur %= mod;
				if(mp[cur]) {
					rip = 1;
					break;
				}
			}
			if(rip) {
				cout<<"YES" <<endl;
				continue;
			}
			cout<<"NO" <<" " <<Sz(ans) <<endl;
		}
	}


	return 0;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 14
• Subtask 3: 0 / 25
• Subtask 4: 0 / 32
• Subtask 5: 0 / 18