Submission #758261

#	Time	Username	Problem	Language	Result	Execution time	Memory
758261		ivaziva	Crocodile's Underground City (IOI11_crocodile)	C++14	0 / 100	0 ms	340 KiB

crocodile

#include "crocodile.h"
#include <bits/stdc++.h>

using namespace std;

#define MAXN 1010

int travel_plan(int N,int M,int R[][2],int L[],int K,int P[])
{
    long long n;
    long long m;
    long long k;
    vector<pair<long long,long long>> adj[MAXN];
    long long niz[MAXN];
    long long dist1[MAXN];
    long long dist2[MAXN];
    long long pos[MAXN];
    n=N; m=M; k=K;
    for (long long i=0;i<m;i++)
    {
        long long x=R[i][0];
        long long y=R[i][1];
        long long z=L[i];
        adj[x].push_back({y,z});
        adj[y].push_back({x,z});
    }
    for (long long i=0;i<MAXN;i++)
    {
        dist1[i]=LLONG_MAX;
        dist2[i]=LLONG_MAX;
    }
    priority_queue<pair<long long,long long>,vector<pair<long long,long long>>,greater<pair<long long,long long>>> pq;
    for (long long i=0;i<k;i++)
    {
        niz[i+1]=P[i-1];
        pq.push({0,niz[i+1]});
        dist1[niz[i+1]]=0;
        dist2[niz[i+1]]=0;
        pos[niz[i+1]]=1;
    }
    while (pq.empty()==false)
    {
        long long node0=pq.top().second;
        long long dist0=pq.top().first;
        pq.pop();
        if (dist0>dist2[node0]) continue;
        if (pos[node0]>1) continue;
        long long s=adj[node0].size();
        for (long long i=0;i<s;i++)
        {
            long long node=adj[node0][i].first;
            long long dist=adj[node0][i].second;
            if (dist0+dist<dist1[node])
            {
                dist2[node]=dist1[node];
                dist1[node]=dist0+dist;
                pq.push({dist1[node],node});
            }
            else if (dist0+dist<dist2[node])
            {
                dist2[node]=dist0+dist;
                pq.push({dist2[node],node});
            }
        }
        pos[node0]++;
    }
    return (int)dist2[0];
}

Compilation message (stderr)

crocodile.cpp: In function 'int travel_plan(int, int, int (*)[2], int*, int, int*)':
crocodile.cpp:10:15: warning: variable 'n' set but not used [-Wunused-but-set-variable]
   10 |     long long n;
      |               ^

• Subtask 1: 0 / 46
• Subtask 2: 0 / 43
• Subtask 3: 0 / 11