Submission #336143

#	Time	Username	Problem	Language	Result	Execution time	Memory
336143		super_j6	Mechanical Doll (IOI18_doll)	C++14	10 / 100	4 ms	4300 KiB

doll

#include "doll.h"
#include <iostream>
#include <cstdio>
#include <algorithm>
#include <vector>
using namespace std;
#define endl '\n'
#define ll long long
#define pi pair<int, int>
#define f first
#define s second
#define vi vector<int>

const int mxn = 1 << 19;
int n, k, t;
bool b[mxn];
vi f, u(mxn), v(mxn);

int bld(int l, int r){
	if(l == r) return 0;
	if(r < k - n - (n & 1)) return -1;
	int it = t++, mid = (l + r) / 2;
	u[it] = bld(l, mid), v[it] = bld(mid + 1, r);
	return -it - 1;
}

void add(int x, int y){
	x = -x - 1;
	int &z = b[x] ? v[x] : u[x];
	b[x] ^= 1;
	if(!z) z = y;
	else add(z, y);
}
/*
void answer(vi f, vi u, vi v){
	for(int i = 0; i < f.size(); i++){
		cout << i << ": " << f[i] << endl;
	}
	for(int i = 0; i < u.size(); i++){
		cout << (-i - 1) << ": " << u[i] << " " << v[i] << endl;
	} 
}
*/
void create_circuit(int m, vi a){
	n = a.size(), k = 1 << (__lg(n - 1) + 1);
	bld(0, k - 1);
	
	for(int i = 1; i < n; i++) add(-1, a[i]);
	add(-1, 0);
	
	f.assign(m + 1, -1), u.resize(t), v.resize(t);
	f[0] = a[0];
	
	answer(f, u, v);
}
/*
int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	
	int n, m;
	cin >> n >> m;
	
	vi a(n);
	for(int i = 0; i < n; i++) cin >> a[i];
	
	create_circuit(m, a);

	return 0;
}
*/

• Subtask 1: 0 / 2
• Subtask 2: 0 / 4
• Subtask 3: 0 / 10
• Subtask 4: 10 / 10
• Subtask 5: 0 / 18
• Subtask 6: 0 / 56