Submission #1093863

#	Time	Username	Problem	Language	Result	Execution time	Memory
1093863		Nonoze	Mechanical Doll (IOI18_doll)	C++17	100 / 100	96 ms	17336 KiB

doll

/*
*	Author: Nonoze
*	Created: Sunday 11/08/2024
*/
#include <bits/stdc++.h>
#include "doll.h"

using namespace std;

#ifndef _IN_LOCAL
	#define dbg(...)
#endif

#define endl '\n'
#define endlfl '\n' << flush
#define quit(x) return (void)(cout << x << endl)

template<typename T> void read(T& x) { cin >> x;}
template<typename T1, typename T2> void read(pair<T1, T2>& p) { read(p.first), read(p.second);}
template<typename T> void read(vector<T>& v) { for (auto& x : v) read(x); }
template<typename T1, typename T2> void read(T1& x, T2& y) { read(x), read(y); }
template<typename T1, typename T2, typename T3> void read(T1& x, T2& y, T3& z) { read(x), read(y), read(z); }
template<typename T1, typename T2, typename T3, typename T4> void read(T1& x, T2& y, T3& z, T4& zz) { read(x), read(y), read(z), read(zz); }
template<typename T> void print(vector<T>& v) { for (auto& x : v) cout << x << ' '; cout << endl; }

#define sz(x) (int)(x.size())
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define cmin(a, b) a = min(a, b)
#define cmax(a, b) a = max(a, b)

// #define int long long
const int inf = numeric_limits<int>::max() / 4;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int MOD = 1e9+7, LOG=25;

int m, n, base=0;
vector<int> a, ans, x, y, state;
vector<pair<int, int>> par;

void build(int prec, bool left, int mx, int nb) {
	if (nb==0) {
		if (prec<=0) ans[-prec]=base;
		else if (left) x[prec-1]=base;
		else y[prec-1]=base;
		return;
	}
	if (mx==2) {
		if (nb==1) {
			if (prec<=0) ans[-prec]=-sz(x)-1;
			else if (left) x[prec-1]=-sz(x)-1;
			else y[prec-1]=-sz(x)-1;
			x.pb(base), y.pb(-inf), par.pb({prec, left});
			return;
		}
		if (prec<=0) ans[-prec]=-sz(x)-1;
		else if (left) x[prec-1]=-sz(x)-1;
		else y[prec-1]=-sz(x)-1;
		x.pb(-inf), y.pb(-inf), par.pb({prec, left});
		return;
	}
	if (prec<=0) ans[-prec]=-sz(x)-1;
	else if (left) x[prec-1]=-sz(x)-1;
	else y[prec-1]=-sz(x)-1;
	if (base==0) base=-sz(x)-1;
	x.pb(inf), y.pb(inf), par.pb({prec, left});
	int s=sz(x);
	build(s, 1, mx/2, max(0, nb-mx/2));
	build(s, 0, mx/2, min(nb, mx/2));
}


void simulate(int empl, int val) {
	int nxt=(state[empl]?y[empl]:x[empl]);
	if (nxt==-inf) {
		if (state[empl]) y[empl]=val;
		else x[empl]=val;
		state[empl]^=1;
		return;
	}
	nxt=-nxt-1;
	state[empl]^=1;
	simulate(nxt, val);
}

void create_circuit(int MM, vector<int> AA) { m=MM, a=AA, n=sz(a); ans.resize(m+1, inf); ans[0]=a[0];
	state.resize(2*n);
	vector<vector<int>> nxts(m+1);
	vector<bool> done(m+1, 0);
	for (int i=0; i<n; i++) nxts[a[i]].pb((i<n-1?a[i+1]:0));
	vector<int> nxt;
	int first=0;
	for (int i=1; i<n; i++) {
		if (sz(nxts[a[i-1]])>4) nxt.pb(a[i]), first=a[i-1];
	}
	if (sz(nxts[a.back()])>4) nxt.pb(0), first=a.back();
	for (int i=1; i<=m; i++) if (sz(nxts[i])<=4) {
		if (sz(nxts[i])<=1) {
			if (sz(nxts[i])==1) ans[i]=nxts[i][0];
			else ans[i]=0;
			continue;
		}
		base=0;
		int mx=1;
		while (mx<sz(nxts[i])) mx*=2;
		build(-i, 1, mx, sz(nxts[i]));
		for (auto u: nxts[i]) simulate(-ans[i]-1, u);
	}
	if (sz(nxt)>=2) {
		base=0;
		int mx=1;
		while (mx<sz(nxt)) mx*=2;
		build(-first, 1, mx, sz(nxt));
		for (auto u: nxt) simulate(-ans[first]-1, u);
	}
	for (auto &u: ans) if (u==inf) u=ans[first];
	// for (int i=0; i<=m; i++) {
	// 	cout << i << ' ' << ans[i] << endl;
	// }
	// for (int i=0; i<sz(x); i++) {
	// 	cout << -i-1 << ' ' << x[i] << ' ' << y[i] << endl;
	// }
	answer(ans, x, y);
}

• Subtask 1: 2 / 2
• Subtask 2: 4 / 4
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 18 / 18
• Subtask 6: 56 / 56