제출 #467957

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
467957		nonsensenonsense1	Fun Tour (APIO20_fun)	C++17	0 / 100	1 ms	256 KiB

fun

#include "fun.h"
#include <algorithm>
#include <vector>

const int N = 100000;
std::pair<int, int> dist[2][N];
bool u[N];

std::vector<int> createFunTour(int n, int q) 
{
	int v0, v1, d = 0;
	for (int i = 1; i < n; ++i) {
		int cur = hoursRequired(0, i);
		if (cur > d) {
			v0 = i;
			d = cur;
		}
	}
	d = 0;
	for (int i = 0; i < n; ++i) {
		dist[0][i] = std::make_pair(hoursRequired(v0, i), i);
		if (dist[0][i].first > d) {
			v1 = i;
			d = dist[0][i].first;
		}
	}
	for (int i = 0; i < n; ++i) dist[1][i] = std::make_pair(hoursRequired(v1, i), i);
	std::sort(dist[0], dist[0] + n);
	std::sort(dist[1], dist[1] + n);
	std::vector<int> ans;
	for (int i = 2 * n - 1; i >= 0; --i) if (!u[dist[i & 1][i >> 1].second]) {
		ans.push_back(dist[i & 1][i >> 1].second);
		u[ans.back()] = true;
	}
	return ans;
}

컴파일 시 표준 에러 (stderr) 메시지

fun.cpp: In function 'std::vector<int> createFunTour(int, int)':
fun.cpp:27:71: warning: 'v1' may be used uninitialized in this function [-Wmaybe-uninitialized]
   27 |  for (int i = 0; i < n; ++i) dist[1][i] = std::make_pair(hoursRequired(v1, i), i);
      |                                                          ~~~~~~~~~~~~~^~~~~~~
fun.cpp:21:44: warning: 'v0' may be used uninitialized in this function [-Wmaybe-uninitialized]
   21 |   dist[0][i] = std::make_pair(hoursRequired(v0, i), i);
      |                               ~~~~~~~~~~~~~^~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 16
• Subtask 3: 0 / 21
• Subtask 4: 0 / 19
• Subtask 5: 0 / 34