Submission #497666

#	Time	Username	Problem	Language	Result	Execution time	Memory
497666		Hanksburger	기지국 (IOI20_stations)	C++17	100 / 100	998 ms	764 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
vector<int> adj[1005], ans;
int dfs(int U, int P, int cnt, bool X)
{
	if (X)
	{
		ans[U]=cnt;
		cnt++;
		for (int i=0; i<adj[U].size(); i++)
		{
			int V=adj[U][i];
			if (V!=P)
				cnt=dfs(V, U, cnt, 0);
		}
	}
	else
	{
		for (int i=0; i<adj[U].size(); i++)
		{
			int V=adj[U][i];
			if (V!=P)
				cnt=dfs(V, U, cnt, 1);
		}
		ans[U]=cnt;
		cnt++;
	}
	return cnt;
}
vector<int> label(int N, int K, vector<int> U, vector<int> V)
{
	for (int i=0; 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]);
	}
	ans.clear();
	for (int i=0; i<N; i++)
		ans.push_back(0);
	dfs(0, -1, 0, 1);
	return ans;
}
int find_next_station(int S, int T, vector<int> C)
{
	if (S<C[0])
	{
		int P=C[C.size()-1];
		if (T<S || T>=P)
			return P;
		for (int i=0; i<C.size(); i++)
			if (T<=C[i])
				return C[i];
	}
	else
	{
		int P=C[0];
		if (T<=P || T>S)
			return P;
		for (int i=C.size()-1; i>=0; i--)
			if (T>=C[i])
				return C[i];
	}
}

Compilation message (stderr)

stations.cpp: In function 'int dfs(int, int, int, bool)':
stations.cpp:11:18: 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<adj[U].size(); i++)
      |                 ~^~~~~~~~~~~~~~
stations.cpp:20:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |   for (int i=0; i<adj[U].size(); i++)
      |                 ~^~~~~~~~~~~~~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:53:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |   for (int i=0; i<C.size(); i++)
      |                 ~^~~~~~~~~
stations.cpp:66:1: warning: control reaches end of non-void function [-Wreturn-type]
   66 | }
      | ^

• Subtask 1: 5 / 5
• Subtask 2: 8 / 8
• Subtask 3: 16 / 16
• Subtask 4: 10 / 10
• Subtask 5: 61 / 61