Submission #1252916

#	Time	Username	Problem	Language	Result	Execution time	Memory
1252916		Geforgs	Curtains (NOI23_curtains)	C++20	100 / 100	776 ms	85692 KiB

curtains

#include <iostream>
#include <iomanip>
#include <vector>
#include <cmath>
#include <algorithm>
#include <set>
#include <queue>
#include <map>
#include <unordered_map>
#include <stack>
#include <bit>
#include <bitset>
#include <string>
#include <cstring>
#include <iterator>
#include <random>
#define ll long long
#define ld long double
#define inf (ll)(2*1e18)
#define sort(a) sort(a.begin(), a.end())
#define reverse(a) reverse(a.begin(), a.end())
#define pb push_back
#define endl "\n"
using namespace std;

void push(ll id, vector<ll>& c, vector<ll>& p){
    c[2*id] = max(c[2*id], p[id]);
    p[2*id] = max(p[2*id], p[id]);
    c[2*id+1] = max(c[2*id+1], p[id]);
    p[2*id+1] = max(p[2*id+1], p[id]);
    p[id] = -1;
}

void update(ll id, ll l, ll r, ll tl, ll tr, ll val, vector<ll>& c, vector<ll>& p){
    if(r < tl or tr < l) return;
    if(tl <= l and r <= tr){
        c[id] = max(c[id], val);
        p[id] = max(p[id], val);
        return;
    }
    push(id, c, p);
    ll m=(l+r)/2;
    update(2*id, l, m, tl, tr, val, c, p);
    update(2*id+1, m+1, r, tl, tr, val, c, p);
    c[id] = min(c[2*id], c[2*id+1]);
}

ll get(ll id, ll l, ll r, ll tl, ll tr, vector<ll>& c, vector<ll>& p){
    if(r < tl or tr < l) return inf;
    if(tl <= l and r <= tr){
        return c[id];
    }
    push(id, c, p);
    ll m=(l+r)/2;
    return min(get(2*id, l, m, tl, tr, c, p), get(2*id+1, m+1, r, tl, tr, c, p));
}

void solve(){
    ll n, m, q, i, x, y;
    cin>>n>>m>>q;
    vector<vector<ll>> a(n);
    vector<vector<pair<ll, ll>>> b(n);
    vector<bool> queries(q);
    vector<ll> c(4*n, -1);
    vector<ll> p(4*n, -1);
    for(i=0;i<m;++i){
        cin>>x>>y;
        --x;
        --y;
        a[y].pb(x);
    }
    for(i=0;i<q;++i){
        cin>>x>>y;
        --x;
        --y;
        b[y].pb({x, i});
    }
    for(i=0;i<n;++i){
        for(auto el: a[i]){
            update(1, 0, n-1, el, i, el, c, p);
        }
        for(auto [el, id]: b[i]){
            x = get(1, 0, n-1, el, i, c, p);
            queries[id] = el <= x;
        }
    }
    for(i=0;i<q;++i){
        if(queries[i]){
            cout<<"YES"<<endl;
        }else{
            cout<<"NO"<<endl;
        }
    }
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    srand(time(nullptr));
    ll t=1;
//    cin>>t;
    for(;t>0;--t){
        solve();
    }
    return 0;
}

• Subtask 1: 3 / 3
• Subtask 2: 6 / 6
• Subtask 3: 15 / 15
• Subtask 4: 20 / 20
• Subtask 5: 36 / 36
• Subtask 6: 20 / 20