Submission #244059

#	Time	Username	Problem	Language	Result	Execution time	Memory
244059		crossing0ver	Mechanical Doll (IOI18_doll)	C++17	Compilation error	0 ms	0 KiB

doll

#include<bits/stdc++.h>
#define pb push_back
#define vi vector<int>
#define fi first
#define se second
//#define local

#ifndef local
#include "doll.h"
#endif
using namespace std;

void create_circuit(int M, vi A) {
  int n = A.size();
  vi C(n);
  vector<int> X, Y;
  vector<vector<int> >  F(M+1);
  int num = 0;
  C[0] = A[0];
  for (int i = 0; i < n; ++i) {
  	if (C[A[i]] == 0) C[A[i]] = -(++num);
  	int id = C[A[i]];
  	F[id].pb((i != n ?  A[i+1] : 0));
  }
  for (auto i = 1; i <= N; i++) {
  	if (F[i].size() == 0) continue;
  	if (F[i].size() == 1) X.pb(-i), Y.pb(F[i][0]);
  	else X.pb(F[i][0]), Y.pb(F[i][1]);
  }
  answer(C, X, Y);
}

Compilation message (stderr)

doll.cpp: In function 'void create_circuit(int, std::vector<int>)':
doll.cpp:25:25: error: 'N' was not declared in this scope
   25 |   for (auto i = 1; i <= N; i++) {
      |                         ^