Submission #432809

#	Time	Username	Problem	Language	Result	Execution time	Memory
432809		Hazem	Stations (IOI20_stations)	C++14	5 / 100	984 ms	784 KiB

stations

#include "stations.h"
#include <vector>
#include <bits/stdc++.h>

using namespace std;

const int N = 2e3;
int cnt = 0;

int dfs(int i,int pre,vector<int> &ret,vector<int> adj[]){

	int mx = cnt;
	ret[i] = cnt++;
	
	for(int j=0;j<adj[i].size();j++){
		int v = adj[i][j];
		if(v==pre)continue;

		mx = max(mx,dfs(v,i,ret,adj));
	}
	//ret[i] += mx*1000;
	return mx;
}

std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
	
	cnt = 0;
	vector<int>adj[N];
	for(int i=0;i<n-1;i++){
		adj[u[i]].push_back(v[i]);
		adj[v[i]].push_back(u[i]);
	}
	vector<int> ret = vector<int>(n,0);
	for(int i=0;i<n;i++)
		if(adj[i].size()==1){
			dfs(i,i,ret,adj);
			break;
		}
	return ret;
}

int get_val(int x,int l,int r){

	int ret = 0;
	return x%1000;
	for(int i=l;i<=r;i++)
		ret |= (1<<(i-l))*(((1<<i)&x)>0);
	return ret;
}

bool cmp(int x,int y){

	return get_val(x,0,9)<get_val(y,0,9);
}

int find_next_station(int s, int t, std::vector<int> c) {
	
	if(s<t)
		return s+1;
	else 
		return s-1;
}

Compilation message (stderr)

stations.cpp: In function 'int dfs(int, int, std::vector<int>&, std::vector<int>*)':
stations.cpp:15:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |  for(int j=0;j<adj[i].size();j++){
      |              ~^~~~~~~~~~~~~~

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