Submission #1247461

#	Time	Username	Problem	Language	Result	Execution time	Memory
1247461		m5588ohammed	Digital Circuit (IOI22_circuit)	C++20	0 / 100	197 ms	8644 KiB

circuit

#include "circuit.h"
#include <bits/stdc++.h>
using namespace std;
#define mod 1000002022
#define ll long long
ll n,m;
ll to[200001],tf[200001],ta[200001],cs[200001];
vector <ll> v[200001];
void update_node(ll i){
	if(n<=i) return;
	to[i]=(to[i*2]*to[i*2+1]*2)%mod;
	to[i]+=(tf[i*2]*to[i*2+1])%mod;
	to[i]+=(to[i*2]*tf[i*2+1])%mod;
	to[i]%=mod;
	tf[i]=(ta[i]-to[i]+mod)%mod;
	return;
}
void flip(ll l1,ll r1,ll i,ll l,ll r){
	if(l1>=r||l>r1) return;
	if(l<=l1&&r1<=r){
		swap(to[i],tf[i]);
		return;
	}
	flip(l1,(l1+r1)/2,i*2,l,r);
	flip((l1+r1)/2+1,r1,i*2+1,l,r);
	update_node(i);
	return;
}
void build(ll i){
	tf[i]=1;
	for(ll j:v[i]){
		build(j);
		ta[i]=(ta[i]*ta[j])%mod;
	}
	ta[i]*=(ll)v[i].size();
	ta[i]%=mod;
	return;
}
void init(int N, int M, std::vector<int> P, std::vector<int> A) {
	n=N;m=M;
	for(int i=0;i<m;i++) cs[i+n+1]=A[i];
	for(int i=1;i<n+m;i++) v[P[i]+1].push_back(i+1);
	build(1);
	for(int i=n+1;i<=n+m;i++){
		if(cs[i]==1) to[i]=1;
		else tf[i]=1;
	}
	for(int i=n;i>=1;i--) update_node(i);
	return;
}

int count_ways(int L, int R){
	flip(0,n,1,L-n+1,R-n+1);
	return to[1];
}
// 3 4 3
// -1 0 1 2 1 1 0
// 1 0 1 0
// 3 4
// 4 5
// 3 6


// 1 7 3
// -1 0 0 0 0 0 0 0
// 1 1 1 1 1 1 1
// 1 1
// 2 2
// 4 7

• Subtask 1: 0 / 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