Submission #388934

#	Time	Username	Problem	Language	Result	Execution time	Memory
388934		Killer2501	Crocodile's Underground City (IOI11_crocodile)	C++14	100 / 100	653 ms	79092 KiB

crocodile

#include <bits/stdc++.h>
#define ll long long
//#include "crocodile.h"
#define pb push_back
#define task "asd"
#define pll pair<ll, ll>
#define pii pair<pll, ll>
#define fi first
#define se second

using namespace std;
const ll mod = 1e17+7;
const ll N = 2e5+5;
const int base = 313;

int travel_plan(int n, int m, int r[][2], int l[], int k, int p[])
{
    ll a[n], d[n][2];
    vector<pll> adj[n];
    for(int i = 0; i < m; i ++)
    {
        ll x, y, z;
        x = r[i][1];
        y = r[i][0];
        z = l[i];
        adj[x].pb({z, y});
        adj[y].pb({z, x});
    }
    priority_queue< pll, vector<pll>, greater<pll> > pq;
    for(int i = 0; i < n; i ++)
    {
        d[i][0] = d[i][1] = mod;
        a[i] = 0;
    }
    for(int i = 0; i < k; i ++)
    {
        ll x = p[i];
        d[x][1] = d[x][0] = 0;
        a[x] = 0;
        pq.push({0, x});
    }
    while(!pq.empty())
    {
        pll u = pq.top();
        pq.pop();
        if(a[u.se] == 1)
        {
            continue;
        }
        ++a[u.se];
        for(pll v : adj[u.se])
        {
            ll val = v.fi + u.fi;
            if(val <= d[v.se][0])
            {
                d[v.se][1] = d[v.se][0];
                d[v.se][0] = val;
                if(d[v.se][1] != mod)pq.push({d[v.se][1], v.se});
            }
            else if(val < d[v.se][1])
            {
                d[v.se][1] = val;
                pq.push({d[v.se][1], v.se});
            }
        }
    }
    return d[0][1];
}

• Subtask 1: 46 / 46
• Subtask 2: 43 / 43
• Subtask 3: 11 / 11