Submission #301000

#	Time	Username	Problem	Language	Result	Execution time	Memory
301000		TMJN	Mechanical Doll (IOI18_doll)	C++17	2 / 100	26 ms	3116 KiB

doll

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

void create_circuit(int M,vector<int>A) {
	vector<int>X,Y,C(M+1,0);
	A.push_back(0);
	int f=0;
	for(int i:A){
		C[f]=i;
		f=i;
	}
	vector<bool>B(400000,false);
	int p=0;
	vector<int>T;
	do{
		if(p>=0){
			if(p)T.push_back(p);
			p=C[p];
		}
		else{
			if(B[-p-1]){
				B[-p-1]=!B[-p-1];
				p=Y[-p-1];
			}
			else{
				B[-p-1]=!B[-p-1];
				p=X[-p-1];
			}
		}
	}while(p);
	A.pop_back();
	assert(A==T);
	bool F=false;
	for(int i=0;i<400000;i++){
		F|=B[i];
	}
	assert(!F);
	answer(C,X,Y);
}

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