Submission #714072

#	Time	Username	Problem	Language	Result	Execution time	Memory
714072		Ahmed57	Long Mansion (JOI17_long_mansion)	C++14	100 / 100	315 ms	52404 KiB

long_mansion

#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")

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

signed main(){
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    int n;
    cin>>n;
    int arr[n-1];
    for(int i= 0;i<n-1;i++){
        cin>>arr[i];
    }
    vector<vector<int>>v;
    for(int i = 0;i<n;i++){
        int z;cin>>z;
        vector<int> tmp;
        for(int j= 0;j<z;j++){
            int x;cin>>x;
            tmp.push_back(x);
        }
        v.push_back(tmp);
    }
    int nd[n+1];
    for(int i = 0;i<=n;i++)nd[i] = n;
    int valr[n];
    int vall[n];
    for(int i = n-1;i>=1;i--){
        for(auto j:v[i]){
            nd[j]=i;
        }
        valr[i] = nd[arr[i-1]];
    }
    for(int i = 0;i<=n;i++)nd[i] = -1;
    for(int i = 0;i<n-1;i++){
        for(auto j:v[i]){
            nd[j]=i;
        }
        vall[i]=nd[arr[i]];
    }
    int l[n],r[n];
    for(int i = 0;i<n;i++){
        l[i]=i ,r[i] = i;
        while(1){
            if(l[i]&&valr[l[i]]<=r[i]){
                r[i] = max(r[i],r[l[i]-1]);
                l[i] = l[l[i]-1];
            }else if(r[i]<n-1&&vall[r[i]]>=l[i]){
                r[i]++;
            }else break;
        }
    }
    int q;cin>>q;
    while(q--){
        int x,y;
        cin>>x>>y;
        x--;y--;
        if(y>=l[x]&&y<=r[x]){
            cout<<"YES\n";
        }
        else cout<<"NO\n";
    }
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 15 / 15
• Subtask 4: 75 / 75