Submission #696731

#	Time	Username	Problem	Language	Result	Execution time	Memory
696731		garam1732	Stations (IOI20_stations)	C++14	8 / 100	942 ms	544 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>
using namespace std;

vector<int> adj[1010];

std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
	std::vector<int> labels(n);
	for(int i = 0; i < n; i++) adj[i].clear();

	for(int i = 0; i < u.size(); i++) {
        adj[u[i]].push_back(v[i]);
        adj[v[i]].push_back(u[i]);
	}

	for(int i = 0; i < n; i++) labels[i] = i;
	return labels;
}

int lca(int s, int t) {
    vector<bool> chk(1010);
    for(int here = s; here; here >>= 1) chk[here] = 1;
    for(int here = t; here; here >>= 1) {
        if(chk[here]) return here;
    }
}

int find_next_station(int s, int t, std::vector<int> c) {
	s++; t++;
	int a = lca(s, t);

	if(a != s) return s/2-1;
    while(t/2 != s) t >>= 1;
    return t-1;
}

Compilation message (stderr)

stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:11:19: 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 < u.size(); i++) {
      |                 ~~^~~~~~~~~~
stations.cpp: In function 'int lca(int, int)':
stations.cpp:21:26: warning: control reaches end of non-void function [-Wreturn-type]
   21 |     vector<bool> chk(1010);
      |                          ^

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