Submission #1078098

#	Time	Username	Problem	Language	Result	Execution time	Memory
1078098		pcc	Digital Circuit (IOI22_circuit)	C++17	0 / 100	3026 ms	8024 KiB

circuit

#include "circuit.h"

#include <vector>
#include <bits/stdc++.h>
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,popcnt,sse4")
using namespace std;
#define ll long long
#define pll pair<ll,ll>
#define fs first
#define sc second

const int mxn = 2e5+10;

const ll mod = 1000002022;

vector<int> tree[mxn];
int par[mxn];
int N,M;
ll dp[mxn];
int sz[mxn];
ll arr[mxn];

ll mad(ll a,ll b){
	a += b;
	return a>=mod?a-mod:a;
}
ll mub(ll a,ll b){
	return mad(a,mod-b);
}

ll pw(ll a,ll b){
	ll re = 1;
	while(b){
		if(b&1)re = re*a%mod;
		b>>=1;
		a = a*a%mod;
	}
	return re;
}

void dfs(int now){
	dp[now] = sz[now] = 1;
	for(auto nxt:tree[now]){
		dfs(nxt);
		sz[now] = sz[nxt]*sz[now]%mod;
	}
	if(tree[now].size())sz[now] = sz[now]*tree[now].size()%mod;
	return;
}

void dfs1(int now){
	ll sum = 0;
	for(auto nxt:tree[now])sum = mad(sum,sz[nxt]);
	for(auto nxt:tree[now]){
		ll ts = mub(sum,sz[nxt]);
		ts = max(ts,1ll);
		dp[nxt] = dp[now]*dp[nxt]%mod*ts%mod;
		dfs1(nxt);
	}
	return;
}

void init(int N1, int M1, std::vector<int> P, std::vector<int> A) {
	N = N1,M = M1;
	for(int i = 1;i<N+M;i++){
		par[i] = P[i];
		tree[par[i]].push_back(i);
	}
	for(int i = 0;i<M;i++){
		arr[i+N] = A[i];
	}
	dfs(0);
	dfs1(0);
	/*
	cerr<<"SZ: ";
	for(int i = 0;i<N+M;i++)cerr<<sz[i]<<' ';cerr<<endl;
	cerr<<"DP: ";
	for(int i = 0;i<N+M;i++)cerr<<dp[i]<<' ';cerr<<endl;
	*/
	//for(int i = 0;i<N+M;i++)cerr<<dp[i][0]<<','<<dp[i][1]<<' ';cerr<<endl;
}

int count_ways(int L, int R) {
	for(int i = L;i<=R;i++){
		arr[i] ^= 1;
	}
	//cerr<<"NOW: ";for(int i = N;i<N+M;i++)cerr<<arr[i]<<' ';cerr<<endl;
	ll ans = 0;
	for(int i = N;i<N+M;i++)ans = mad(ans,dp[i]*arr[i]%mod);
	return ans;
	//dfs(0);
	//cerr<<"NOW: ";
	//for(int i = N;i<N+M;i++)cerr<<(dp[i][0]?0:1);cerr<<endl;
}

• 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