제출 #441531

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
441531		elazarkoren	Exam (eJOI20_exam)	C++17	0 / 100	1115 ms	337652 KiB

exam

#include <iostream>
#include <vector>
#include <algorithm>
#include <stack>
#include <set>
#define x first
#define y second
#define chkmin(a, b) a = min(a, b)
#define chkmax(a, b) a = max(a, b)
#define all(v) v.begin(), v.end()
using namespace std;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int, int> pii;
typedef vector<pii> vii;

const int MAX_N = 10;

int b[MAX_N];

struct Seg{
    int l, r, mid, val = 0, lazy_val = 0;
    Seg *lp, *rp;
    Seg(int l, int r): l(l), r(r), mid((l + r) / 2) {
        if (l + 1 != r) {
            lp = new Seg(l, mid);
            rp = new Seg(mid, r);
        }
    }
    void push() {
        if (lazy_val) {
            lp->val = lp->lazy_val = lazy_val;
            rp->val = rp->lazy_val = lazy_val;
        }
    }
    void pull() {
        val = max(lp->val, rp->val);
    }
    int query(int a, int b) {
        if (a <= l && r <= b) return val;
        if (r <= a || b <= l) return 0;
        push();
        return max(lp->query(a, b), rp->query(a, b));
    }
    void update(int a, int b, int x) {
        if (a <= l && r <= b) {
            val = x;
            lazy_val = x;
            return;
        }
        if (r <= a || b <= l) return;
        push();
        lp->update(a, b, x), rp->update(a, b, x);
        pull();
    }
    int Count() {
        if (l + 1 == r) {
            return val == b[l];
        }
        push();
        return lp->Count() + rp->Count();
    }
};

int n;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin >> n;
    vi a(n);
    for (int i = 0; i < n; i++) cin >> a[i];
    for (int i = 0; i < n; i++) cin >> b[i];
    vi per(n + 1);
    for (int i = 0; i <= n; i++) per[i] = i;
    int ans = 0;
    do {
        Seg seg(0, n);
        for (int i = 0; i < n; i++) seg.update(i, i + 1, a[i]);
        for (int i = 0; i < n; i++) {
            seg.update(per[i], per[i + 1], seg.query(per[i], per[i + 1]));
            if (seg.Count() == 4) {
                cout << "";
            }
            chkmax(ans, seg.Count());
        }
    } while (next_permutation(all(per)));
    cout << ans;
}

• Subtask 1: 0 / 14
• Subtask 2: 0 / 12
• Subtask 3: 0 / 13
• Subtask 4: 0 / 23
• Subtask 5: 0 / 16
• Subtask 6: 0 / 22