Submission #300939

#	Time	Username	Problem	Language	Result	Execution time	Memory
300939		TMJN	Mechanical Doll (IOI18_doll)	C++17	0 / 100	2 ms	332 KiB

doll

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

void create_circuit(int M,vector<int>A){
	assert(false);
	vector<int>X,Y,C;
	X=Y=vector<int>(400000,0);
	C=vector<int>(M+1,0);
	vector<vector<int>>K(M+1);
	for(int i=1;i<=M;i++){
		C[i]=-i*3;
		X[i*3-1]=-i*3-1;
		Y[i*3-1]=-i*3-2;
		X[i*3]=-i*3;
		Y[i*3]=-i*3;
		X[i*3+1]=-i*3;
		Y[i*3+1]=-i*3;
	}
	C[0]=A[0];
	
	A.push_back(0);
	for(int i=0;i<A.size()-1;i++){
		K[A[i]].push_back(A[i+1]);
	}
	for(int i=1;i<=M;i++){
		if(K[i].size()==0)continue;
		if(K[i].size()==1){
			C[i]=K[i][0];
		}
		if(K[i].size()==2){
			X[i*3-1]=K[i][0];
			Y[i*3-1]=K[i][1];
		}
		if(K[i].size()==3){
			X[i*3+1]=K[i][0];
			Y[i*3]=K[i][1];
			Y[i*3+1]=K[i][2];
		}
		if(K[i].size()==4){
			X[i*3]=K[i][0];
			X[i*3+1]=K[i][1];
			Y[i*3]=K[i][2];
			Y[i*3+1]=K[i][3];
		}
	}
	A.pop_back();
	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]){
				p=Y[-p-1];
			}
			else{
				p=X[-p-1];
			}
			B[-p-1]=!B[-p-1];
		}
	}while(p);
	assert(A==T);
	bool f=false;
	for(int i=0;i<400000;i++){
		f|=B[i];
	}
	assert(!f);
	answer(C,X,Y);
}

Compilation message (stderr)

doll.cpp: In function 'void create_circuit(int, std::vector<int>)':
doll.cpp:23:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |  for(int i=0;i<A.size()-1;i++){
      |              ~^~~~~~~~~~~

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