Submission #796920

#	Time	Username	Problem	Language	Result	Execution time	Memory
796920		vjudge1	Stations (IOI20_stations)	C++17	0 / 100	629 ms	660 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
int cnt = 0;
vector<int> adj[1010];
vector<int> labels;
void dfs(int n, int p, int dep=1) {
    if(dep%2)
        labels[n] = cnt++;
    for(auto j: adj[n])
        if(j!=p)
            dfs(j,n,dep+1);
    if(!(dep%2))
        labels[n] = cnt++;
}
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
    cnt = k = 0;
    for(int i = 0; i < n; i++)
        adj[i].clear();
    labels.resize(n);
	for(int i = 0; i < n-1; i++)
        adj[u[i]].push_back(v[i]), adj[v[i]].push_back(u[i]);
    dfs(0,-1);
	return labels;
}
bool inrange(int l, int r, int x) {
    if(l>r) swap(l,r);
    return l<=x&&x<=r;
}
int find_next_station(int s, int t, vector<int> c) {
	c.push_back(s);
     sort(c.begin(),c.end());
    if(c[0]==s)
        reverse(c.begin(),c.end());
    int p = c[0];
    int start = 1;
    if(s==0) start = 0;
    for(int i = 1; i < c.size()-1; i++)
            if(inrange(max(c[i],c[i+1])-1,min(c[i],c[i+1]),t))
                return c[i];
    return p;
}

Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:38:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |     for(int i = 1; i < c.size()-1; i++)
      |                    ~~^~~~~~~~~~~~
stations.cpp:36:9: warning: variable 'start' set but not used [-Wunused-but-set-variable]
   36 |     int start = 1;
      |         ^~~~~

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