Submission #710511

#	Time	Username	Problem	Language	Result	Execution time	Memory
710511		myrcella	Digital Circuit (IOI22_circuit)	C++17	18 / 100	16 ms	2256 KiB

circuit

//by szh
#include<bits/stdc++.h>
using namespace std;

#define fi first
#define se second
#define pii pair<int,int>
#define pll pair<long long,long long>
#define pb push_back
#define debug(x) cerr<<#x<<"="<<x<<endl
#define pq priority_queue
#define inf 0x3f
#define rep(i,a,b) for (int i=a;i<(b);i++)
#define MP make_pair
#define SZ(x) (int(x.size()))
#define ll long long
#define mod 1000002022
#define ALL(x) x.begin(),x.end()
void inc(int &a,int b) {a=(a+b)%mod;}
void dec(int &a,int b) {a=(a-b+mod)%mod;}
int lowbit(int x) {return x&(-x);}
ll p0w(ll base,ll p) {ll ret=1;while(p>0){if (p%2ll==1ll) ret=ret*base%mod;base=base*base%mod;p/=2ll;}return ret;}

#include "circuit.h"

const int maxn = 2010;
int a[maxn];
vector <int> edge[maxn];

void init(int N, int M, std::vector<int> P, std::vector<int> A) {
	rep(i,1,SZ(P)) {
		edge[P[i]].pb(i);
	}
	rep(i,0,SZ(A)) a[i+N]=A[i];
}

pii solve(int u) {
	if (SZ(edge[u])==0) {
		if (a[u]==0) return {0,1};
		else return {1,0};
	}
	vector <pii> ans;
	for (int v:edge[u]) {
		ans.pb(solve(v));
	}
	vector <int> f;
	f.pb(1);
	rep(i,0,SZ(ans)) {
		f.pb(1ll*f.back()*ans[i].fi%mod);
		for (int j = i;j>=0;j--) {
			f[j] = 1ll*f[j]*ans[i].se%mod;
			if (j>0) inc(f[j],1ll*f[j-1]*ans[i].fi%mod);
		}
	}
	pii ret = {0,0};
	rep(i,0,SZ(f)) {
		inc(ret.se,1ll*f[i]*(SZ(f)-1-i)%mod);
		inc(ret.fi,1ll*f[i]*i%mod);
	}
	return ret;
}

int count_ways(int L, int R) {
	rep(i,L,R+1) a[i]^=1;
  return solve(0).fi;
}

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