Submission #306900

#	Time	Username	Problem	Language	Result	Execution time	Memory
306900		giorgikob	Stations (IOI20_stations)	C++14	0 / 100	2 ms	660 KiB

stations

#include "stations.h"
#include <vector>
#include<bits/stdc++.h>
#define ll long long
#define ff first
#define ss second
#define pb push_back
using namespace std;

const int N = 1e3+5;

vector<int>gr[N];

int cnt = 0;
int fix[N];
//int c = 0;

void dfs(int x, vector<int>&v){
    fix[x] = 1;
    v[x] = cnt; cnt++;
    for(auto to : gr[x]){
        if(fix[to]) continue;
        dfs(to,v);
    }
}

std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
	std::vector<int> labels(n,0);

	for(int i = 0; i < u.size(); i++){
        int x = u[i];
        int y = v[i];
        gr[x].pb(y);
        gr[y].pb(x);
	}
    cnt = 0;
	for(int i = 0; i < n; i++){
        if(gr[i].size() == 1){
            dfs(i,labels);
            break;
        }
	}

	for(int i = 0; i < n; i++){
        for(int j = i+1; j < n; j ++){
            assert(labels[i] != labels[j]);
        }
	}

	//for(auto x : labels) cout << x <<" "; cout << endl;
	//if(labels[0] == 0) dfs(0,labels);

	for(int i = 0; i < n; i++) gr[i].clear();

	return labels;
}

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

Compilation message (stderr)

stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:30:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |  for(int i = 0; i < u.size(); i++){
      |                 ~~^~~~~~~~~~

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