Submission #1094492

#	Time	Username	Problem	Language	Result	Execution time	Memory
1094492		4QT0R	Mechanical Doll (IOI18_doll)	C++17	Compilation error	0 ms	0 KiB

doll

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

int iter;
vector<int> tab[200004];
pair<int,int> swt[300004];

void build(int v, vector<int> now){
	vector<int> sep[2];
	for (int i = 0; i<now.size(); i++)sep[i&1].push_back(now[i]);
	if (sep[0].size()==1)swt[-v].first=sep[0][0];
	else{
		swt[-v].first=--iter;
		build(iter,sep[0]);
	}
	if (sep[1].size()==1)swt[-v].second=sep[1][0];
	else if (sep[1].size()){
		swt[-v].second=--iter;
		build(iter,sep[1]);
	}
}

void create_circut(int m, vector<int> a){
	a.insert(a.begin(),0);
	a.push_back(0);
	int n=a.size();
	vector<int> trig(m+1,0);

	for (int i = 0; i<n-1; i++)tab[a[i]].push_back(a[i+1]);
	for (int i = 0; i<=m; i++){
		if (tab[i].size()==1)trig[i]=tab[i][0];
		else if (tab[i].size()){
			trig[i]=--iter;
			build(iter,tab[i]);
		}
	}
	vector<int> x(-iter);
	vector<int> y(-iter);
	for (int i = 1; i+iter<=0; i++){
		x[i-1]=swt[i].first;
		y[i-1]=swt[i].second;
	}
	answer(trig,x,y);
}

Compilation message (stderr)

doll.cpp: In function 'void build(int, std::vector<int>)':
doll.cpp:11:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |  for (int i = 0; i<now.size(); i++)sep[i&1].push_back(now[i]);
      |                  ~^~~~~~~~~~~
/usr/bin/ld: /tmp/ccWPjmaB.o: in function `main':
grader.cpp:(.text.startup+0x168): undefined reference to `create_circuit(int, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status