Submission #696743

#	Time	Username	Problem	Language	Result	Execution time	Memory
696743		garam1732	Stations (IOI20_stations)	C++14	52.32 / 100	940 ms	908 KiB

stations

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

vector<int> adj[1010];
int in[1010], out[1010], cnt;

void dfs(int here, int par) {
    in[here] = ++cnt;
    for(int there : adj[here]) {
        if(there == par) continue;
        dfs(there, here);
    }
    out[here] = cnt;
}

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();
	cnt = -1;

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

	dfs(0, 0);
	for(int i = 0; i < n; i++) labels[i] = in[i]*1000+out[i];
	return labels;
}

int find_next_station(int s, int t, std::vector<int> c) {
	if(s/1000 <= t/1000 && t%1000 <= s%1000) {
        for(int i = 0; i < c.size(); i++) if(c[i]/1000 > t/1000) return c[i-1];
        return *c.rbegin();
	}

	return c[0];
}

Compilation message (stderr)

stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:22:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |  for(int i = 0; i < u.size(); i++) {
      |                 ~~^~~~~~~~~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:34:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |         for(int i = 0; i < c.size(); i++) if(c[i]/1000 > t/1000) return c[i-1];
      |                        ~~^~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 8
• Subtask 3: 16 / 16
• Subtask 4: 10 / 10
• Subtask 5: 26.3205 / 61