Submission #1205235

#	Time	Username	Problem	Language	Result	Execution time	Memory
1205235		notme	Stations (IOI20_stations)	C++20	0 / 100	303 ms	584 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>
#define pb push_back
using namespace std;
const int maxn = 2e3 + 10;
vector < int > g[maxn];

int tmr = 0;
int tin[maxn], tout[maxn];
void dfs(int beg, int from)
{
    tmr ++;
    tin[beg] = tmr;
    for (auto nb: g[beg])
    {
        if(nb == from)continue;
        dfs(nb, beg);
    }
    tmr ++;
    tout[beg] = tmr;
}
std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v)
{
    for (int i = 0; i < n; ++ i)
        g[i].clear();
    for (int i = 0; i < n; ++ i)
        tin[i] = tout[i] = 0;
    tmr = 0;
    for (int i = 0; i < n-1; ++ i)
    {
        g[u[i]].pb(v[i]);
        g[v[i]].pb(u[i]);
    }
    dfs(0, -1);
    std::vector<int> labels(n);
    for (int i = 0; i < n; i++)
    {
        labels[i] = tout[i];
        assert(labels[i] > 0);
    }
    return labels;
}

int find_next_station(int s, int t, std::vector<int> c)
{
    int lst = c.back();

    if(lst > s)
    {

        int par = c.back();
        c.pop_back();
        if(t == par)return par;

        int bigger = 0, fst= 0;
        for (auto x: c)
        {
            if(x >= t)
            {
                bigger = 1;
                fst = x;
                continue;
            }
        }
        if(!bigger && t < s)return par;
        else if(bigger && t < s)return fst;
        else if(t > s)return par;
       return 0/0;
    }
    else
    {
        for (auto x: c)
        {
            if(x >= t)
                return x;
        }
    }
}

Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:68:16: warning: division by zero [-Wdiv-by-zero]
   68 |        return 0/0;
      |               ~^~
stations.cpp:78:1: warning: control reaches end of non-void function [-Wreturn-type]
   78 | }
      | ^

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