Submission #203294

#	Time	Username	Problem	Language	Result	Execution time	Memory
203294		MKopchev	Tales of seafaring (POI13_mor)	C++14	100 / 100	2182 ms	27384 KiB

mor

#include<bits/stdc++.h>
using namespace std;
const int nmax=5e3+42,kmax=1e6+42,inf=1e9+42;

int n,m,k;
vector<int> adj[nmax];

struct query
{
    int from,to,dist,id;
};
query inp[kmax];

bool cmp(query a,query b)
{
    return a.from<b.from;
}

bool output[kmax];

int dist[nmax][2];

queue< pair<int,bool> > active;
void bfs(int start)
{
    for(int i=1;i<=n;i++)
    {
        dist[i][0]=inf;
        dist[i][1]=inf;
    }

    active.push({start,0});
    dist[start][0]=0;

    while(active.size())
    {
        pair<int,bool> current=active.front();
        active.pop();
        int node=current.first;
        bool type=current.second;
        //cout<<node<<" "<<type<<" "<<dist[node][type]<<endl;

        for(auto k:adj[node])
            if(dist[node][type]+1<dist[k][!type])
            {
                dist[k][!type]=dist[node][type]+1;
                active.push({k,!type});
            }

    }
}
int main()
{
    scanf("%i%i%i",&n,&m,&k);

    int u,v;
    for(int i=1;i<=m;i++)
    {
        scanf("%i%i",&u,&v);
        adj[u].push_back(v);
        adj[v].push_back(u);
    }

    for(int i=1;i<=k;i++)
    {
        scanf("%i%i%i",&inp[i].from,&inp[i].to,&inp[i].dist);
        inp[i].id=i;
    }

    sort(inp+1,inp+k+1,cmp);

    int pointer=1;
    for(int i=1;i<=n;i++)
    {
        bfs(i);
        while(inp[pointer].from==i)
        {
            if(dist[inp[pointer].to][inp[pointer].dist%2]<=inp[pointer].dist)
            {
                if(dist[inp[pointer].to][inp[pointer].dist%2]==0&&adj[inp[pointer].to].size()==0)output[inp[pointer].id]=0;
                else output[inp[pointer].id]=1;
            }
            pointer++;
        }
    }

    for(int i=1;i<=k;i++)
        if(output[i])printf("TAK\n");
        else printf("NIE\n");
    return 0;
}

Compilation message (stderr)

mor.cpp: In function 'int main()':
mor.cpp:54:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%i%i%i",&n,&m,&k);
     ~~~~~^~~~~~~~~~~~~~~~~~~
mor.cpp:59:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%i%i",&u,&v);
         ~~~~~^~~~~~~~~~~~~~
mor.cpp:66:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%i%i%i",&inp[i].from,&inp[i].to,&inp[i].dist);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10