제출 #592287

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
592287		farhan132	기지국 (IOI20_stations)	C++17	0 / 100	3047 ms	2097152 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>
 
using namespace std;
 
typedef int ll;
typedef pair<ll , ll> ii;
 
#define ff first
#define ss second
#define pb push_back
#define in insert

const ll N = 1005;
vector < ll > v[N];
vector < int > labels;

ll in[N], out[N];
ll tim = 0;

void dfs(ll s, ll p = -1, ll d = 0){
	in[s] = tim; tim++;
	for(auto u : v[s]){
		if(u - p){
			dfs(u, s, d + 1);
		}
	}
	out[s] = tim; tim++;
	if(d&1) labels[s] = in[s]/2;
	else labels[s] = out[s]/2;
}

std::vector<int> label(int n, int k, std::vector<int> U, std::vector<int> V) {
	
	for(ll i = 0; i < n - 1; i++){
		ll x = U[i], y = V[i];
		v[x].pb(y);
		v[y].pb(x);
	}
	labels.resize(n);

	dfs(0);


//	for(auto u : labels) cout << u << ' ';
//	cout << '\n';

	return labels;
}

int find_next_station(int s, int t, std::vector<int> c) {
	if(c.size() == 1){
		return c[0];
	}
	s = (s * 2) + 1;
	t = (t * 2) + 1;
	for(ll i = 0; i < c.size(); i++){
		c[i] = (c[i] * 2) + 1;
	}
	if(s == 1){
		c.pb(1e9);
		for(ll i = 1; i < c.size(); i++){
			if(t < c[i]) return c[i - 1]/2;
		}
	}
	bool f = 1;
	for(auto u : c){
		if(u <= s) f = 0;
	}
	if(f){
		// s is IN
		ll par = c.back(); c.pop_back();
		c.emplace(c.begin(), s);
		for(ll i = 1; i < c.size(); i++){
			if(c[i - 1] < t && t <= c[i]) return c[i]/2;
		}
		return par/2;
	}
	// s is OUT
	ll par = c[0];
	c.pb(s);
	for(ll i = 2; i < c.size(); i++){
		if(c[i - 1] <= t && t < c[i]) return c[i - 1]/2;
	}
	return par/2;
}

컴파일 시 표준 에러 (stderr) 메시지

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:57:18: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |  for(ll i = 0; i < c.size(); i++){
      |                ~~^~~~~~~~~~
stations.cpp:62:19: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |   for(ll i = 1; i < c.size(); i++){
      |                 ~~^~~~~~~~~~
stations.cpp:74:19: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |   for(ll i = 1; i < c.size(); i++){
      |                 ~~^~~~~~~~~~
stations.cpp:82:18: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   82 |  for(ll i = 2; i < c.size(); i++){
      |                ~~^~~~~~~~~~

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