Submission #305580

#	Time	Username	Problem	Language	Result	Execution time	Memory
305580		kishtarn555	Stations (IOI20_stations)	C++14	100 / 100	1049 ms	1108 KiB

stations

#include "stations.h"
#include <vector>
#include <algorithm>
#include <iostream>
using namespace std;

void dfs(int cur, int ant, int & dtime, int h, vector<int> &labels, vector<vector<int> > & adj) {
    if (h%2==0)
        labels[cur]=dtime++;
    for (int ni: adj[cur]) {
        if (ni==ant)continue;
        dfs(ni, cur, dtime, h+1, labels, adj);
    }

    if (h%2==1) {
        labels[cur]=dtime++;
    }

}
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++) {
		labels[i] = i;
	}
	int d =0;
	vector<vector<int> > adj(n);
	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, d, 0, labels, adj);

	return labels;
}

int find_next_station(int s, int t, std::vector<int> c) {
    sort(c.begin(), c.end());
    //cout << "("<<s<<","<<t<<")";

    for (int i =0; i < c.size(); i++) {
        if (c[i]==t)return t;
    }
    if (s==0) {
            int prev=0;
        for (int i=0; i < c.size(); i++) {
            if (prev <= t && t <= c[i])
                return c[i];
            prev=c[i];
        }
        return -1;
    }
    if (c[0] < s) {
        if (t < c[0] || t > s)return c[0];
        int prev=s;
        for (int i = c.size()-1; i >=0; i--){
            if (c[i] <= t && t <= prev) return c[i];
            prev=c[i];
        }
        return -2;
    } else {
        if(t<s||t>c[c.size()-1]) return c[c.size()-1];
        int prev=s;
        for (int i = 0; i < c.size(); i++) {
            if (prev<= t && t <= c[i])return c[i];
            prev=c[i];
        }
        return -3;

    }

}

Compilation message (stderr)

stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:27:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |  for (int i =0; i < u.size(); i++) {
      |                 ~~^~~~~~~~~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:40:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |     for (int i =0; i < c.size(); i++) {
      |                    ~~^~~~~~~~~~
stations.cpp:45:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |         for (int i=0; i < c.size(); i++) {
      |                       ~~^~~~~~~~~~
stations.cpp:63:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |         for (int i = 0; i < c.size(); i++) {
      |                         ~~^~~~~~~~~~

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