Submission #250033

#	Time	Username	Problem	Language	Result	Execution time	Memory
250033		ernestvw	Mechanical Doll (IOI18_doll)	C++11	6 / 100	88 ms	11864 KiB

doll

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

#define sz(x) ((int)x.size())
#define terminate blabliblou

void answer(vector<int> C, vector<int> X, vector<int> Y);

int n, m;
vector<int> a;
vector<vector<int>> adj;

int p = 0;
vector<int> c, x, y;

int new_switch(int g, int d, bool b = 0) {
	p++;
  if(b)return -p;
	x.push_back(g);
	y.push_back(d);
	return -p;
}

int new_switch(int g) {
	p++;
	x.push_back(-p);
	y.push_back(g);
	return -p;
}

int liste[300000];
int PR = 1;
int mom = -1;

void terminate() {
  answer(vector<int>(),vector<int>(),vector<int>());
  exit(0);
}

int build(int X, int pr) {
	if(pr == 1) {
		mom = new_switch(0, 0,1);
		int g = build(X, 2 * pr);
      	int d = build(X + pr, 2 * pr);
      	//x[-mom-1] = build(X, 2 * pr);
		//y[-mom-1] = build(X + pr, 2 * pr);
		return mom;
	}
  	if(p > 1000) terminate();
	if(pr == PR) return (liste[X] == -1 ? mom : liste[X]);
  	int g = build(X, 2 * pr);
  	int d = build(X + pr, 2 * pr);
  	return new_switch(g, d,1);
}

int create(int t) {
	if(sz(adj[t]) == 0) return 0;
	if(sz(adj[t]) == 1) return adj[t][0];
	if(sz(adj[t]) == 2) return new_switch(adj[t][0], adj[t][1]);
	int pr = 1;
	while(pr < sz(adj[t])) pr *= 2;
	PR = pr;
	for(int i = 0; i < pr - sz(adj[t]); ++i)
		liste[i] = -1;
	for(int i = pr - sz(adj[t]); i < pr; ++i)
		liste[i] = adj[t][i - pr + sz(adj[t])];
	return build(0, 1);
}

/*int Create(int t, int i, int j) {
	if(i > j) return 0;
	if(i == j) return adj[t][i];
	if(i + 2 == j) {
		int p1 = new_switch(adj[t][i], adj[t][i + 1]);
		int p2 = new_switch(-p-2, adj[t][i + 2]);
		return new_switch(p1, p2);
	}
	if(i + 3 == j)
		return new_switch(new_switch(adj[t][i], adj[t][i + 2]), new_switch(adj[t][i + 1], adj[t][i + 3]));
	return new_switch(create(t, i, (i + j) / 2), create(t, (i + j) / 2 + 1, j));
}*/


void create_circuit(int M, vector<int> A) {
	n = (int)A.size();
	m = M;
	a = A;

	c.assign(m + 1, 0);

	adj.assign(m + 1, vector<int>());
	for(int i = 0; i < n - 1; ++i)
		adj[a[i]].push_back(a[i + 1]);
	adj[0].push_back(a[0]);
	adj[a.back()].push_back(0);
/*
	for(int i = 0; i <= m; ++i) {
		cout << i << ": ";
		for(int j : adj[i])cout<<j<<" ";
		cout<<endl;
	}
*/
	for(int i = 0; i <= m; ++i)
		c[i] = create(i);

	answer(c, x, y);
}

Compilation message (stderr)

doll.cpp: In function 'int build(int, int)':
doll.cpp:43:7: warning: unused variable 'g' [-Wunused-variable]
   43 |   int g = build(X, 2 * pr);
      |       ^
doll.cpp:44:12: warning: unused variable 'd' [-Wunused-variable]
   44 |        int d = build(X + pr, 2 * pr);
      |            ^

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