Submission #295043

#	Time	Username	Problem	Language	Result	Execution time	Memory
295043		SeDunion	Mechanical Doll (IOI18_doll)	C++14	53 / 100	293 ms	38108 KiB

doll

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

const int MAXN = 1e6;
vector<int> g[MAXN];
vector<int> X, Y;
int p[MAXN];
int gid (int x) { if (x==0)while(1); return abs(x)-1; }
void add (int v, int f) {
	if (X[gid(v)] == MAXN) {
		X[gid(v)] = f;
		// if (f < 0)
			// p[gid(f)] = v;
	} else {
		if (X[gid(v)] < 0)
			add (X[gid(v)], f);
		else while(1);
		// else if (Y[gid(v)] < 0)
			// add (Y[gid(v)], f);
	}
	swap (X[gid(v)], Y[gid(v)]);
}

void create_circuit(int M, vector<int> A) {
	int N = A.size();
	vector<int> C(M + 1);
	g[0].push_back (A[0]);
	for (int i = 1 ; i < N ; ++ i) {
		g[A[i - 1]].push_back (A[i]);
	}
	g[A[N - 1]].push_back (0);
	int r = -1;
	for (int i = 0 ; i <= M ; ++ i) {
		if (g[i].empty()) continue;
		int cnt = g[i].size();
		if (cnt == 1) { C[i] = g[i][0]; continue; }
		int l = 0;
		while (cnt > (1 << l)) ++l;
		assert ((1 << l) < 2 * cnt);
		// cout << l << " " << cnt << " q\n";
		cnt = (1 << l) - 1;
		int s = r;
		C[i] = r--;
		X.push_back (MAXN);
		Y.push_back (MAXN);
		cnt--;
		while (cnt--) {
			add (C[i], r--);
			X.push_back (MAXN);
			Y.push_back (MAXN);
		}
		cnt = (1 << l);
		for (int ii = 0 ; ii + 1 < g[i].size() ; ++ ii) {
			add (C[i], g[i][ii]);
			--cnt;
			// cout << C[i] << " " << g[i][ii] << " add\n";
		}
		--cnt;
		while (cnt--) {
			add (C[i], s);
		}
		add (C[i], g[i].back());
	}
	// for (int i : C) cout << i << " "; cout << "\n";
	// for (int i : X) cout << i << " "; cout << "\n";
	// for (int i : Y) cout << i << " "; cout << "\n";
	answer (C, X, Y);
}

Compilation message (stderr)

doll.cpp: In function 'void create_circuit(int, std::vector<int>)':
doll.cpp:54:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |   for (int ii = 0 ; ii + 1 < g[i].size() ; ++ ii) {
      |                     ~~~~~~~^~~~~~~~~~~~~

• Subtask 1: 2 / 2
• Subtask 2: 4 / 4
• Subtask 3: 10 / 10
• Subtask 4: 0 / 10
• Subtask 5: 9.0000000036 / 18
• Subtask 6: 28.0000000112 / 56