Submission #992188

#	Time	Username	Problem	Language	Result	Execution time	Memory
992188		vivkostov	Bitaro’s Party (JOI18_bitaro)	C++14	0 / 100	10 ms	25692 KiB

bitaro

#include<bits/stdc++.h>
#define endl "\n"
using namespace std;
void speed()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
}
int n,m,qu,a,b,x[200005],y[200005],used[200005],br[200005];
vector<int>v[200005],c[200005];
void bfs(int beg)
{
    used[beg]=1;
    int w,nb;
    queue<int>q;
    q.push(beg);
    //cout<<beg<<endl;
    while(!q.empty())
    {
        w=q.front();
        q.pop();
        if(br[w])br[w]--;
        if(br[w])continue;
        //cout<<w<<" "<<beg<<endl;
        for(int i=0;i<v[w].size();i++)
        {
            nb=v[w][i];
            q.push(nb);
            used[nb]=used[w]+1;
            br[nb]++;
        }
    }
}
void read()
{
    cin>>n>>m>>qu;
    for(int i=1;i<=m;i++)
    {
        cin>>a>>b;
        v[b].push_back(a);
    }
    for(int i=1;i<=qu;i++)
    {
        cin>>x[i]>>y[i];
        for(int j=1;j<=y[i];j++)
        {
            int h;
            cin>>h;
            c[i].push_back(h);
        }
        bfs(x[i]);
        int ma=0,num=0;
        for(int j=1;j<=n;j++)
        {
            //cout<<used[j]<<" "<<j<<endl;
            if(j!=c[i][num])ma=max(ma,used[j]-1);
            else num++;
            used[j]=0;
            br[j]=0;
        }
        cout<<ma<<endl;
    }
}
int main()
{
    speed();
    read();
    return 0;
}

Compilation message (stderr)

bitaro.cpp: In function 'void bfs(int)':
bitaro.cpp:26:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |         for(int i=0;i<v[w].size();i++)
      |                     ~^~~~~~~~~~~~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 7
• Subtask 3: 0 / 86