Submission #300994

#	Time	Username	Problem	Language	Result	Execution time	Memory
300994		TMJN	Mechanical Doll (IOI18_doll)	C++17	Compilation error	0 ms	0 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);
	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:33:7: error: conflicting declaration 'bool f'
   33 |  bool f=false;
      |       ^
doll.cpp:8:6: note: previous declaration as 'int f'
    8 |  int f=0;
      |      ^