Submission #718475

#	Time	Username	Problem	Language	Result	Execution time	Memory
718475		baojiaopisu	Stations (IOI20_stations)	C++14	0 / 100	1214 ms	2097152 KiB

stations

#include "stations.h"
#include <vector>
#include <algorithm>
using namespace std;
const int N = 1e3 + 10;
#define pb push_back

vector<int> ans;
int Time = 0;
vector<int> g[N];

void dfs(int u, int par, int t) {
	if(!t) ans[u] = ++Time;
	for(auto v : g[u]) {
		if(v != par) {
			dfs(v, par, t ^ 1);
		}
	}
	if(t) ans[u] = ++Time;
}

vector<int> label(int n, int k, vector<int> u, vector<int> v) {
	for(int i = 0; i < n; i++) {
		g[u[i]].pb(v[i]);
		g[v[i]].pb(u[i]);
	}

	ans.resize(n);
	dfs(0, -1, 0);
	return ans;
}

int find_next_station(int s, int t, vector<int> c) {
	sort(c.begin(), c.end());
	if(c.size() == 1) return c[0];

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

Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:39:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |   for(int i = 0; i < c.size() - 1; i++) {
      |                  ~~^~~~~~~~~~~~~~
stations.cpp:45:20: 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 = 1; i < c.size(); i++) {
      |                  ~~^~~~~~~~~~

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