Submission #721618

#	Time	Username	Problem	Language	Result	Execution time	Memory
721618		Erkinoff_Mohammed	Event Hopping (BOI22_events)	C++14	0 / 100	152 ms	11716 KiB

events

#include "bits/stdc++.h"
using namespace std;
#define INF 2000000000
#define INFLL 3000000000000000000LL
#define ll long long





int main() {
    cin.tie(0)->sync_with_stdio(0);
    int n,q;
    cin>>n>>q;
    pair<pair<int,int>,int>arr[n];
    for(int i=0;i<n;i++){
        int l,r;
        cin>>l>>r;
        arr[i]={{l,r},i+1};
    }
    sort(arr,arr+n);
    map<int,int>mp;
    for(int i=0;i<n;i++){
        mp[arr[i].second]=i;
    }
    set<int>s;
    for(int i=1;i<n;i++){
        if(arr[i-1].first.second<arr[i].first.first){
            s.insert(i);
        }
    }
    cout<<"\n";
    while(q--){
        int a,b;
        cin>>a>>b;
        auto it=s.upper_bound(a);
        if(it!=s.end())if((*it)<=b){
            cout<<"impossible\n";
            continue;
        }
        int out=mp[b]-mp[a];
        if(out<0)cout<<"impossible\n";
        else cout<<out<<"\n";
    }
}

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