Submission #1143786

#	Time	Username	Problem	Language	Result	Execution time	Memory
1143786		DON_F	Matryoshka (JOI16_matryoshka)	C++20	100 / 100	1513 ms	37168 KiB

matryoshka

#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define all(x) x.begin(), x.end()
#define L(i, b, e) for (int i = b; i < e; ++i)
#define R(i, b, e) for (int i = b; i >= e; --i)
#define pb emplace_back
#define vi vector<int>
#define sz(x) ((int) x.size())
const int N = 2e5 + 7, Mx = 1e9 + 9;
int n, q;
pair<int, int> s[N];
vi f[N];
vector<pair<int, int>> t[N];
int ans[N];

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cin >> n >> q;
    vi p;
    L(i, 0, n){
        cin >> s[i].first >> s[i].second;
        p.pb(s[i].first);
    }
    sort(all(p));
    p.erase(unique(all(p)), p.end());
    map<int, int> c;
    L(i, 0, sz(p))c[p[i]] = i;
    L(i, 0, n){
        f[c[s[i].first]].pb(s[i].second);
    }
    L(i, 0, q){
        int a, b;
        cin >> a >> b;
        auto it = lower_bound(all(p), a);
        if (it != p.end()){
            t[it - p.begin()].pb(b, i);
        }
    }
    vi a;
    R(i, sz(p) - 1, 0){
        sort(all(f[i]));
        sort(all(t[i]));
        deque<int> cur;
        int k = 0, w = 0, l = 0;
        t[i].pb(1e9, -1);
        L(j, 0, sz(t[i])){
            while (k < sz(f[i]) && f[i][k] <= t[i][j].first){
                cur.pb(f[i][k]);
                ++k;
            }
            while (!cur.empty() && w < sz(a) && a[w] <= t[i][j].first){
                if (cur.front() < a[w]){
                    a[w] = cur.front();
                    cur.pop_front();
                }
                ++w;
            }
            while (l < sz(a) && a[l] <= t[i][j].first)++l;
            if (t[i][j].second != -1)ans[t[i][j].second] = l + sz(cur);
        }
        for (auto &j : cur)a.pb(j);
    }
    L(i, 0, q)cout << ans[i] << "\n";
}

• Subtask 1: 11 / 11
• Subtask 2: 15 / 15
• Subtask 3: 25 / 25
• Subtask 4: 49 / 49