Submission #441525

#	Time	Username	Problem	Language	Result	Execution time	Memory
441525		elazarkoren	Exam (eJOI20_exam)	C++17	0 / 100	1091 ms	332 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 = 1e5 + 1;

//int a[MAX_N];
int b[MAX_N];

void update(int l, int r, vi &v) {
    if (l > r) swap(l, r);
    int x = 0;
    for (int i = l; i <= r; i++) {
        chkmax(x, v[i]);
    }
    for (int i = l; i <= r; i++) {
        v[i] = x;
    }
}

int n;

int Count(vi &v) {
    int ans = 0;
    for (int i = 0; i < n; i++) {
        if (v[i] == b[i]) ans++;
    }
    return ans;
}

int main() {
    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);
    for (int i = 0; i < n; i++) per[i] = i;
    int ans = 0;
    do {
        vi curr = a;
        for (int i = 0; i + 1 < n; i += 2) {
            update(per[i], per[i + 1], curr);
            chkmax(ans, Count(curr));
        }
    } 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