제출 #429142

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
429142		koioi.org-koosaga	Meetings (JOI19_meetings)	C++17	컴파일 에러	0 ms	0 KiB

meetings

#include "meetings.h"
#include <bits/stdc++.h>
using namespace std;
using pi = pair<int, int>;
#define sz(v) ((int)(v).size())
mt19937 rng(0x14004);
int randint(int lb, int ub){ return uniform_int_distribution<int>(lb, ub)(rng); }

void bridge(int x, int y){ Bridge(min(x, y), max(x, y)); }

void dfs(vector<int> v){
	if(v.size() == 1) return;
	if(v.size() == 2){
		bridge(v[0], v[1]);
		return;
	}
    shuffle(v.begin(), v.end(), rng);
    vector<pi> ords;
    ords.emplace_back(v[0], v[0]);
    ords.emplace_back(v[1], v[1]);
	for(int i=2; i<v.size(); i++){
		int q = Query(v[0], v[1], v[i]);
		ords.emplace_back(q, i);
	}
	sort(ords.begin(), ords.end(), [&](pi a, pi b){
		if(a.first != b.first) return Query(v[0], a.first, b.first) == a.first;
		return a.second < b.second;
	});
	for(int i = 0; i < sz(ords); ){
		int e = i;
		while(e < sz(ords) && ords[i].first == ords[e].first){
			w.push_back(ords[e++].second);
		}
		dfs(w);
		if(e < sz(ords)) bridge(ords[i].first, ords[e].first);
		i = e;
	}
}

void Solve(int N) {
	vector<int> v(N);
	iota(v.begin(), v.end(), 0);
	dfs(v);
}

컴파일 시 표준 에러 (stderr) 메시지

meetings.cpp: In function 'void dfs(std::vector<int>)':
meetings.cpp:21:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |  for(int i=2; i<v.size(); i++){
      |               ~^~~~~~~~~
meetings.cpp:32:4: error: 'w' was not declared in this scope
   32 |    w.push_back(ords[e++].second);
      |    ^
meetings.cpp:34:7: error: 'w' was not declared in this scope
   34 |   dfs(w);
      |       ^