Submission #616586

#	Time	Username	Problem	Language	Result	Execution time	Memory
616586		John3_141592	Stations (IOI20_stations)	C++14	0 / 100	4 ms	324 KiB

stations

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

using namespace std;

vector <int> grafo[1003];
int arr[1003],C;
bool vis[1003];

void dfs(int node){ 
    vis[node]=true,arr[node]=0;
    for(auto i:grafo[node]) if(!vis[i]) dfs(i),arr[node]|=arr[i];
    arr[node]|=(1<<C),C++;
}

std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
    for(int i=0;i<n;i++) grafo[i].clear();
    for(int i=0;i<n-1;i++) grafo[u[i]].push_back(v[i]),grafo[v[i]].push_back(u[i]);
    C=0,dfs(0);
    vector <int> vec;
    for(int i=0;i<n;i++) vec.push_back(arr[i]);
    return vec;
}

int find_next_station(int s, int t, std::vector<int> c) {
    if(c.size()==1) return c[0];
    for(auto i:c) if(i&t==t) return i;
    return c.back();
}

Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:27:25: warning: self-comparison always evaluates to true [-Wtautological-compare]
   27 |     for(auto i:c) if(i&t==t) return i;
      |                        ~^~~
stations.cpp:27:25: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
   27 |     for(auto i:c) if(i&t==t) return i;
      |                        ~^~~

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