oj.uz

Submission #802344

# Submission time Handle Problem Language Result Execution time Memory
802344 2023-08-02T11:45:35 Z Sohsoh84 Giraffes (JOI22_giraffes) C++17
59 / 100
 4607 ms 91468 KB 
// Wounds should become scars but I'm cracked instead U+1FAE0
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<ll, ll> pll;

#define all(x)			(x).begin(),(x).end()
#define X			first
#define Y			second
#define sep			' '
#define endl			'\n'
#define debug(x)		cerr << #x << ": " <<  x << endl;

const ll MAXN = 500 + 10;
const ll TMAX = 1e6 + 10;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int dp[MAXN][MAXN][MAXN], n, P[TMAX], ind[TMAX];

inline int rand_perm() {
	int l = 1, r = n;
	int fl = 1, fr = n;
	int ans = n;

	for (int i = 1; i <= n; i++) {
		if (P[l] == fl) {
			ans--;
			l++;
			fl++;
		} else if (P[l] == fr) {
			ans--;
			l++;
			fr--;
		} else if (P[r] == fl) {
			ans--;
			r--;
			fl++;
		} else if (P[r] == fr) {
			ans--;
			r--;
			fr--;
		} else {
			int tfl = fl;
			int tfr = fr;

			/*if (ind[fl] < l || ind[fl] > r) tfl++;
			else if (ind[fr] < l || ind[fr] > r) tfr--;
			else*/ if (rng() % 2) tfl++;
			else tfr--;

			if (P[l] < fl || P[l] > fr) l++;
			else if (P[r] < fl || P[r] > fr) r--;
			else if (rng() % 2) l++;
			else r--;

			fl = tfl;
			fr = tfr;
		}
	}

	return ans;
}

int main() {
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
	cin >> n;
	for (int i = 1; i <= n; i++) {
		cin >> P[i];
		ind[P[i]] = i;
	}

	if (n < MAXN) {
		for (int len = 1; len <= n; len++) {
			for (int l = 1; l <= n - len + 1; l++) {
				for (int tl = 1; tl <= n - len + 1; tl++) {
					int r = l + len - 1;
					int tr = tl + len - 1;

					if (P[l] == tl) dp[len][l][tl] = dp[len - 1][l + 1][tl + 1] + 1;
					else if (P[r] == tl) dp[len][l][tl] = dp[len - 1][l][tl + 1] + 1;
					else if (P[l] == tr) dp[len][l][tl] = dp[len - 1][l + 1][tl] + 1;
					else if (P[r] == tr) dp[len][l][tl] = dp[len - 1][l][tl] + 1;
					else dp[len][l][tl] = max({
							dp[len - 1][l][tl], 
							dp[len - 1][l + 1][tl], 
							dp[len - 1][l][tl + 1], 
							dp[len - 1][l + 1][tl + 1]
							});
				}
			}
		}

		cout << n - dp[n][1][1] << endl;
	} else {
		int fuck = 10000000 * 17 / n;

		int ans = n;
		while (fuck--) {
			ans = min(ans, rand_perm());
		}

		cout << ans << endl;
	}

	return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 468 KB Output is correct
14 Correct 0 ms 468 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 0 ms 468 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 0 ms 468 KB Output is correct
19 Correct 1 ms 468 KB Output is correct
20 Correct 1 ms 468 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 468 KB Output is correct
14 Correct 0 ms 468 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 0 ms 468 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 0 ms 468 KB Output is correct
19 Correct 1 ms 468 KB Output is correct
20 Correct 1 ms 468 KB Output is correct
21 Correct 1 ms 1236 KB Output is correct
22 Correct 4 ms 9828 KB Output is correct
23 Correct 16 ms 35284 KB Output is correct
24 Correct 30 ms 59908 KB Output is correct
25 Correct 60 ms 85024 KB Output is correct
26 Correct 47 ms 89160 KB Output is correct
27 Correct 60 ms 89708 KB Output is correct
28 Correct 48 ms 90316 KB Output is correct
29 Correct 57 ms 90972 KB Output is correct
30 Correct 49 ms 91468 KB Output is correct

Subtask #4
0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 468 KB Output is correct
14 Correct 0 ms 468 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 0 ms 468 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 0 ms 468 KB Output is correct
19 Correct 1 ms 468 KB Output is correct
20 Correct 1 ms 468 KB Output is correct
21 Correct 1 ms 1236 KB Output is correct
22 Correct 4 ms 9828 KB Output is correct
23 Correct 16 ms 35284 KB Output is correct
24 Correct 30 ms 59908 KB Output is correct
25 Correct 60 ms 85024 KB Output is correct
26 Correct 47 ms 89160 KB Output is correct
27 Correct 60 ms 89708 KB Output is correct
28 Correct 48 ms 90316 KB Output is correct
29 Correct 57 ms 90972 KB Output is correct
30 Correct 49 ms 91468 KB Output is correct
31 Incorrect 4607 ms 356 KB Output isn't correct
32 Halted 0 ms 0 KB -