Submission #241694

#	Time	Username	Problem	Language	Result	Execution time	Memory
241694		osaaateiasavtnl	Long Mansion (JOI17_long_mansion)	C++17	25 / 100	3072 ms	75132 KiB

long_mansion

#include<bits/stdc++.h>
using namespace std;
#define ii pair <int, int>
#define app push_back
#define all(a) a.begin(), a.end()
#define bp __builtin_popcountll
#define ll long long
#define mp make_pair
#define f first
#define s second
#define Time (double)clock()/CLOCKS_PER_SEC

const int N = 1 << 20;
int last[N]; 

int l[N << 2], r[N << 2];
void upd(int v, int tl, int tr, int ql, int qr) {
    if (tr < ql || qr < tl) {
        return;
    }   
    if (ql <= tl && tr <= qr) {
        l[v] = max(l[v], ql);
        r[v] = min(r[v], qr);
        return;
    }   
    int tm = (tl + tr) >> 1;
    upd(v * 2 + 1, tl, tm, ql, qr);
    upd(v * 2 + 2, tm + 1, tr, ql, qr);
}   
void write(int v, int tl, int tr, vector <int> &al, vector <int> &ar) {
    if (tl == tr) {
        al[tl] = l[v];
        ar[tl] = r[v];
        return;
    }   
    int tm = (tl + tr) >> 1;

    l[v * 2 + 1] = max(l[v * 2 + 1], l[v]);
    l[v * 2 + 2] = max(l[v * 2 + 2], l[v]);

    r[v * 2 + 1] = min(r[v * 2 + 1], r[v]);
    r[v * 2 + 2] = min(r[v * 2 + 2], r[v]);

    write(v * 2 + 1, tl, tm, al, ar);
    write(v * 2 + 2, tm + 1, tr, al, ar);
}   

signed main() {
    #ifdef HOME
    freopen("input.txt", "r", stdin);
    #else
    #define endl '\n'
    ios_base::sync_with_stdio(0); cin.tie(0);
    #endif

    int n;
    cin >> n;

    for (int i = 0; i < (N << 2); ++i)
        r[i] = n - 1;

    vector <int> c(n-1);
    for (int i = 0; i < n - 1; ++i)
        cin >> c[i];

    vector <vector <int> > a(n);
    for (int i = 0; i < n; ++i) {
        int k;
        cin >> k;
        a[i].resize(k);
        for (int j = 0; j < k; ++j)
            cin >> a[i][j];
    }   

    vector <int> l(n), r(n);
    for (int i = 0; i < n; ++i) {
        l[i] = 0;
        r[i] = n - 1;
    }   

    vector <int> linkl(n), linkr(n);
    for (int i = 0; i < N; ++i)
        last[i] = -1;
    for (int i = 0; i < n - 1; ++i) {
        for (auto e : a[i])
            last[e] = i;
        linkl[i] = last[c[i]]+1;
    }   
    for (int i = 0; i < N; ++i)
        last[i] = n;
    for (int i = n - 1; i >= 0; --i) {
        if (i < n - 1) {
            linkr[i] = last[c[i]]-1;
        }
        for (auto e : a[i])
            last[e] = i;
    }

    for (int i = 0; i < n; ++i) {
        for (int j = linkr[i]; j>=i; --j) {
            if (linkl[j] <= i+1) {
                upd(0, 0, n - 1, i+1, j);
                break;
            }   
        }   
    }   
    for (int j = 0; j < n; ++j) {
        for (int i = linkl[j]-1; i <= j; ++i) {
            if (j <= linkr[i]) {
                upd(0, 0, n - 1, i+1, j);    
                break;
            }
        }   
    }   

    for (int i = 0; i < n; ++i) {
        if (linkr[i] == n - 1) {
            upd(0, 0, n - 1, i+1, n - 1);
        }   
    }   

    for (int i = 0; i < n; ++i) {
        if (linkl[i] == 0) {
            upd(0, 0, n - 1, 0, i);
        }   
    }

    write(0, 0, n - 1, l, r);

    int q;
    cin >> q;
    while (q--) {
        int i, j;
        cin >> i >> j;
        --i; --j;
        if (l[i] <= j && j <= r[i]) {
            cout << "YES" << endl;
        }   
        else {
            cout << "NO" << endl;
        }   
    }   
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 15 / 15
• Subtask 4: 0 / 75