제출 #718262

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
718262		duchuy297	기지국 (IOI20_stations)	C++17	0 / 100	3098 ms	2097152 KiB

stations

#include "stations.h"
#include <vector>
#include<bits/stdc++.h>
using namespace std;
const int N = 1005;
vector<int> adj[N];
int cnt;
vector<int> res;
void dfs (int u, int p, int lv) {
	if (lv == 0) res[u] = cnt++;
	for (auto v : adj[u]) {
		if (v == p) continue;
		dfs(v,u,lv^1);
	}
	if (lv == 1) res[u] = cnt++;
}
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
	cnt = 0;
	res.resize(n);
	for (int i=1; i<=n; i++) adj[i].clear();
	for (int i=0; i<n-1; i++) {
		adj[u[i]].push_back(v[i]);
		adj[v[i]].push_back(u[i]);
	}
	dfs (0,0,0);
	return res;
}
int find_next_station(int s, int t, vector<int> c) {
	sort (c.begin(),c.end());
	if (s < c[0]) { // in
		if (t < s) return c.back(); // father
		// ti[s] >= t
		for (int i=0; i<(int)c.size()-1; i++) {
			if (c[i] >= t)  return c[i];
		}
		return c.back();
	}
	else { // out
		if (t > s) return c[0]; // father
		// to[s] >= t
		for (int i=1; i<c.size(); i++) {
			if (c[i] <= t) return c[i];
		}
		return c[0];
	}
}

컴파일 시 표준 에러 (stderr) 메시지

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:41:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |   for (int i=1; i<c.size(); i++) {
      |                 ~^~~~~~~~~

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