Submission #633176

#	Time	Username	Problem	Language	Result	Execution time	Memory
633176		study	Digital Circuit (IOI22_circuit)	C++17	2 / 100	3061 ms	9172 KiB

circuit

#include <bits/stdc++.h>
#include "circuit.h"
using ll=long long;
using namespace std;

const ll mod = 1e9+2022, N = 1e5+1, M = 1e5+1;
pair<ll,ll> segt[4*N+5];
bool lazy[4*N+5];
vector<int> adj[N+M];
set<int> in;
int n=0, m = 0;
bool ok = false;
pair<ll,ll> crt;

void modify(int idx, int l, int r, int L, int R){
	if (r < L or l > R) return;
	if (l >= L and r <= R){
		if (ok){
			swap(segt[idx].first,segt[idx].second);
			lazy[idx] = 1;
		}
		else{
			segt[idx] = crt;
		}
		return;
	}
	if (lazy[idx]){
		lazy[2*idx] = !lazy[2*idx];
		lazy[2*idx+1] = !lazy[2*idx+1];
		swap(segt[2*idx].first,segt[2*idx].second);
		swap(segt[2*idx+1].first,segt[2*idx+1].second);
		lazy[idx] = 0;
	}
	int mid = (l+r)/2;
	modify(2*idx,l,mid,L,R);
	modify(2*idx+1,mid+1,r,L,R);
	segt[idx].first = (segt[2*idx].first+segt[2*idx+1].first)%mod;
	segt[idx].second = (segt[2*idx].second+segt[2*idx+1].second)%mod;
}

void dfs(int node){
	in.emplace(node);
	for (int i:adj[node]){
		dfs(i);
	}
}

void init(int N, int M, vector<int> P, vector<int> A){
	m = M;
	n = N;
	vector<ll> deg(N+M);
	for (int i=1; i<N+M; ++i){
		deg[P[i]]++;
		adj[i].emplace_back(P[i]);
	}
	for (int i=N; i<N+M; ++i){
		in.clear();
		dfs(i);
		ll prod = 1;
		for (int j=0; j<N; ++j){
			if (!in.count(j)){
				prod *= deg[j];
				prod %= mod;
			}
		}
		if (A[i-N]){
			crt = {prod,0};
		}
		else{
			crt = {0,prod};
		}
		modify(1,0,M-1,i-N,i-N);
	}
	ok = true;
}

int count_ways(int L, int R){
	L -= n;
	R -= n;
	modify(1,0,m-1,L,R);
	return segt[1].first;
}

• Subtask 1: 2 / 2
• Subtask 2: 0 / 7
• Subtask 3: 0 / 9
• Subtask 4: 0 / 4
• Subtask 5: 0 / 12
• Subtask 6: 0 / 27
• Subtask 7: 0 / 28
• Subtask 8: 0 / 11