제출 #575051

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
575051		talant117408	Exhibition (JOI19_ho_t2)	C++17	0 / 100	25 ms	6572 KiB

joi2019_ho_t2

#include <bits/stdc++.h>
 
using namespace std;
 
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;
 
#define pb                  push_back
#define mp                  make_pair
#define all(v)              (v).begin(),(v).end()
#define rall(v)             (v).rbegin(),(v).rend()
#define lb                  lower_bound
#define ub                  upper_bound
#define sz(v)               int((v).size())
#define do_not_disturb      ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define endl                '\n'

const int N = 2e5+7;

struct Tree {
    int length, index;
    Tree() {
        length = 0;
        index = 1;
    }
} tree[N*4];

Tree max(Tree a, Tree b) {
    if (a.length == b.length) {
        if (a.index > b.index) return a;
        else return b;
    }
    else if (a.length > b.length) return a;
    else return b;
}

void update(int v, int l, int r, int pos, Tree val) {
    if (l == r) {
        tree[v] = val;
        return;
    }
    int mid = (l+r) >> 1;
    if (pos <= mid) update(v*2, l, mid, pos, val);
    else update(v*2+1, mid+1, r, pos, val);
    tree[v] = max(tree[v*2], tree[v*2+1]);
}

Tree get(int v, int l, int r, int ql, int qr) {
    if (ql > r || l > qr) return Tree();
    if (ql <= l && r <= qr) return tree[v];
    int mid = (l+r) >> 1;
    return max(get(v*2, l, mid, ql, qr), get(v*2+1, mid+1, r, ql, qr));
}

void solve() {
    for (int i = 0; i < N; i++) {
        update(1, 0, N-1, i, Tree());
    }
    
    int n, m;
    cin >> n >> m;
    vector <int> S(n), V(n), C(m), indices(n);
    for (int i = 0; i < n; i++) {
        cin >> S[i] >> V[i];
    }
    for (int i = 0; i < m; i++) {
        cin >> C[i];
    }
    sort(all(C));
    iota(all(indices), 0);
    sort(all(indices), [&](int a, int b) {
        if (S[a] == S[b]) return V[a] < V[b];
        return S[a] < S[b];
    });
    
    // Relative order
    set <int> Sset, Vset;
    map <int, int> Srel, Vrel;
    for (int i = 0; i < n; i++) {
        Sset.insert(S[i]);
        Vset.insert(V[i]);
    }
    for (int i = 0; i < m; i++) {
        Sset.insert(C[i]);
    }
    int j = 0;
    for (auto to : Sset) {
        Srel[to] = j++;
    }
    j = 0;
    for (auto to : Vset) {
        Vrel[to] = j++;
    }
    for (int i = 0; i < n; i++) {
        S[i] = Srel[S[i]];
        V[i] = Vrel[V[i]];
    }
    for (int i = 0; i < m; i++) {
        C[i] = Srel[C[i]];
    }
    
    for (int i = 0; i < n; i++) {
        int j = indices[i];
        auto res = get(1, 0, N-1, 0, V[j]);
    
        res.index = -res.index + 1;
        int it = lb(all(C), S[j]) - C.begin();
        if (res.index == m || it == m) {
            continue;
        }
        res.index = max(res.index, it);
        res.length++;
        res.index = -res.index;
        if (res.length != n) {
            update(1, 0, N-1, V[j], res);
        }
    }
    int ans = 0;
    for (int i = 0; i < n; i++) {
        auto res = get(1, 0, N-1, i, i);
        ans = max(ans, res.length);
    }
    cout << ans;
}

int main() {
    do_not_disturb
    
    int t = 1;
    //~ cin >> t;
    while (t--) {
        solve();
    }
    
    return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 40
• Subtask 3: 0 / 50