Submission #334927

#	Time	Username	Problem	Language	Result	Execution time	Memory
334927		inwbear	Stations (IOI20_stations)	C++14	57.33 / 100	1067 ms	1372 KiB

stations

#include "stations.h"
#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define all(x) (x).begin(),(x).end()
#define MEM(x,a) memset((x),a,sizeof((x)))
#define F first
#define S second
#define imx INT_MAX
const long long MMX = (long long)(1e18);
typedef long long LL;
typedef pair<int,int> pii;
int nn,co[1005],st;
bitset<1005>go;
vector<int>v[1005];
void dfs(int N)
{
	go[N]=true;
	co[N]=nn*1000;
	for(int i=0;i<v[N].size();i++)
	{
		if(!go[v[N][i]])
		{
			dfs(v[N][i]);
		}
	}
	co[N]+=nn;
	nn++;
	return;
}
vector<int>label(int n,int k,vector<int>a,vector<int>b)
{
	vector<int>labels(n);
	nn=0;
	for(int i=0;i<1005;i++)v[i].clear(),go[i]=false;
	for(int i=0;i<a.size();i++)
	{
		v[a[i]].pb(b[i]);
		v[b[i]].pb(a[i]);
	}
	for(int i=0;i<n;i++)if(v[i].size()==1)st=i;
	dfs(st);
	for(int i=0;i<n;i++)labels[i]=co[i];
	return labels;
}

int find_next_station(int s,int t,vector<int>c)
{
	int ss=s/1000,se=s%1000,ts=t/1000,te=t%1000,cs,ce,re;
	//printf("%d %d %d %d\n",ss,se,ts,te);
	if(ss<=ts&&se>=te)
	{
		for(int i=0;i<c.size();i++)
		{
			cs=c[i]/1000;
			ce=c[i]%1000;
			//printf("{%d %d}\n",cs,ce);
			if(ss<=cs&&se>=ce)
			{
				if(cs<=ts&&ce>=te)re=c[i];
			}
		}
	}
	else
	{
		for(int i=0;i<c.size();i++)
		{
			cs=c[i]/1000;
			ce=c[i]%1000;
			//printf("[%d %d]\n",cs,ce);
			if(cs<=ss&&ce>=se)re=c[i];
		}
	}
	return re;
}

Compilation message (stderr)

stations.cpp: In function 'void dfs(int)':
stations.cpp:20:15: 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<v[N].size();i++)
      |              ~^~~~~~~~~~~~
stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:36:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |  for(int i=0;i<a.size();i++)
      |              ~^~~~~~~~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:53:16: 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:66:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |   for(int i=0;i<c.size();i++)
      |               ~^~~~~~~~~
stations.cpp:74:9: warning: 're' may be used uninitialized in this function [-Wmaybe-uninitialized]
   74 |  return re;
      |         ^~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 8
• Subtask 3: 16 / 16
• Subtask 4: 10 / 10
• Subtask 5: 26.3282 / 61