Submission #1125023

#	Time	Username	Problem	Language	Result	Execution time	Memory
1125023		EfeBabagil	Event Hopping (BOI22_events)	C++20	0 / 100	1594 ms	3524 KiB

events

#include <bits/stdc++.h>
using namespace std;
#define int long long

int32_t main()
{
    int n,qu;
    cin>>n>>qu;
    vector<array<int,3>> events(n);
    for(int i=0;i<n;i++)
    {
        int e,s;
        cin>>s>>e;
        events[i]={s,e,i};
    }
   
    
    while(qu--)
    {
        int a,b;
        cin>>a>>b;
        a--;
        b--;
        vector<int> dis(n+1,-1);
        queue<int> q;
        q.push(a);
        while(!q.empty())
        {
            int x=q.front();
            q.pop();
            for(int i=0;i<n;i++)
            {
                if(dis[i]!=-1)
                continue;
                 if(events[i][0] <= events[x][1] && events[x][0] <= events[i][0]) {
                        dis[i] = dis[x] + 1;
                        q.push(i);
                    }
            }
        }
        if(dis[b] == -1)
            cout<<"impossible"<<endl;
        else 
            cout<<dis[b]<<endl;
            
    }
    

    return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 30