Submission #799288

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
799288	2023-07-31T11:52:36 Z	LittleCube	Ancient Books (IOI17_books)	C++17	42 / 100	731 ms	25424 KB

books

#pragma GCC optimize("Ofast,unroll-loops")
#include "books.h"
#include <bits/stdc++.h>
#define ll long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define F first
#define S second
using namespace std;

int n, dp[1005][1005], rp[1005], l, r, range[1005][2];

long long minimum_walk(std::vector<int> p, int s)
{
	n = p.size();
	l = 0, r = n - 1;
	while (l < n && p[l] == l)
		l++;
	if (l == n)
		return 0;
	while (r && p[r] == r)
		r--;

	ll ans = 0;
	if (s < l)
	{
		ans += 2 * (l - s);
		s = l;
	}
	if (r < s)
	{
		ans += 2 * (s - r);
		s = r;
	}
	for (int i = 0; i < n; i++)
		ans += abs(p[i] - i);
	for (int i = 0; i < n; i++)
		rp[p[i]] = i;

	cerr << "calc n\n";
	// calc n

	for (int i = 0; i < n; i++)
		for (int j = 0; j < n; j++)
			dp[i][j] = 1e9;
	dp[s][s] = 0;
	for (int i = 0; i < n; i++)
		range[i][0] = min({i, p[i], rp[i]}), range[i][1] = max({i, p[i], rp[i]});
	for (int l = 0; l < n; l++)
		for (int i = 0; i + l < n; i++)
		{
			int j = i + l;
			for (int k = i; k <= j; k++)
			{
				dp[min(i, range[k][0])][max(j, range[k][1])] = min(dp[min(i, range[k][0])][max(j, range[k][1])], dp[i][j]);
				if (j + 1 < n)
					dp[i][j + 1] = min(dp[i][j + 1], dp[i][j] + 2);
				if (i)
					dp[i - 1][j] = min(dp[i - 1][j], dp[i][j] + 2);
			}
		}
	// for (int i = 0; i < n; i++)
	// 	for (int j = i; j < n; j++)
	// 		cerr << dp[i][j] << " \n"[j == n - 1];
	return ans + dp[l][r];
}

Subtask #1

12.0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	340 KB	Output is correct
2	Correct	1 ms	340 KB	Output is correct
3	Correct	1 ms	340 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	1 ms	340 KB	Output is correct
6	Correct	0 ms	312 KB	Output is correct
7	Correct	0 ms	212 KB	Output is correct
8	Correct	0 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	0 ms	340 KB	Output is correct
11	Correct	1 ms	212 KB	Output is correct
12	Correct	1 ms	212 KB	Output is correct
13	Correct	0 ms	312 KB	Output is correct
14	Correct	1 ms	212 KB	Output is correct
15	Correct	1 ms	340 KB	Output is correct
16	Correct	0 ms	340 KB	Output is correct
17	Correct	0 ms	212 KB	Output is correct
18	Correct	1 ms	340 KB	Output is correct

Subtask #2

10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	340 KB	Output is correct
2	Correct	1 ms	340 KB	Output is correct
3	Correct	1 ms	340 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	1 ms	340 KB	Output is correct
6	Correct	0 ms	312 KB	Output is correct
7	Correct	0 ms	212 KB	Output is correct
8	Correct	0 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	0 ms	340 KB	Output is correct
11	Correct	1 ms	212 KB	Output is correct
12	Correct	1 ms	212 KB	Output is correct
13	Correct	0 ms	312 KB	Output is correct
14	Correct	1 ms	212 KB	Output is correct
15	Correct	1 ms	340 KB	Output is correct
16	Correct	0 ms	340 KB	Output is correct
17	Correct	0 ms	212 KB	Output is correct
18	Correct	1 ms	340 KB	Output is correct
19	Correct	592 ms	4244 KB	Output is correct
20	Correct	585 ms	4240 KB	Output is correct
21	Correct	1 ms	312 KB	Output is correct
22	Correct	704 ms	4244 KB	Output is correct
23	Correct	700 ms	4248 KB	Output is correct
24	Correct	698 ms	4248 KB	Output is correct
25	Correct	701 ms	4244 KB	Output is correct
26	Correct	705 ms	4240 KB	Output is correct
27	Correct	688 ms	4240 KB	Output is correct
28	Correct	666 ms	4244 KB	Output is correct
29	Correct	676 ms	4244 KB	Output is correct

Subtask #3

0 / 28.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	340 KB	Output is correct
2	Correct	1 ms	340 KB	Output is correct
3	Correct	1 ms	340 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	1 ms	340 KB	Output is correct
6	Correct	0 ms	312 KB	Output is correct
7	Correct	0 ms	212 KB	Output is correct
8	Correct	0 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	0 ms	340 KB	Output is correct
11	Correct	1 ms	212 KB	Output is correct
12	Correct	1 ms	212 KB	Output is correct
13	Correct	0 ms	312 KB	Output is correct
14	Correct	1 ms	212 KB	Output is correct
15	Correct	1 ms	340 KB	Output is correct
16	Correct	0 ms	340 KB	Output is correct
17	Correct	0 ms	212 KB	Output is correct
18	Correct	1 ms	340 KB	Output is correct
19	Correct	592 ms	4244 KB	Output is correct
20	Correct	585 ms	4240 KB	Output is correct
21	Correct	1 ms	312 KB	Output is correct
22	Correct	704 ms	4244 KB	Output is correct
23	Correct	700 ms	4248 KB	Output is correct
24	Correct	698 ms	4248 KB	Output is correct
25	Correct	701 ms	4244 KB	Output is correct
26	Correct	705 ms	4240 KB	Output is correct
27	Correct	688 ms	4240 KB	Output is correct
28	Correct	666 ms	4244 KB	Output is correct
29	Correct	676 ms	4244 KB	Output is correct
30	Runtime error	96 ms	25424 KB	Execution killed with signal 11
31	Halted	0 ms	0 KB	-

Subtask #4

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	727 ms	4248 KB	Output is correct
2	Correct	717 ms	4244 KB	Output is correct
3	Correct	731 ms	4244 KB	Output is correct
4	Correct	706 ms	4240 KB	Output is correct
5	Correct	705 ms	4248 KB	Output is correct
6	Correct	685 ms	4244 KB	Output is correct
7	Correct	703 ms	4244 KB	Output is correct
8	Correct	711 ms	4240 KB	Output is correct
9	Correct	704 ms	4240 KB	Output is correct
10	Correct	1 ms	308 KB	Output is correct
11	Correct	647 ms	4248 KB	Output is correct
12	Correct	652 ms	4248 KB	Output is correct
13	Correct	686 ms	4248 KB	Output is correct
14	Correct	686 ms	4244 KB	Output is correct
15	Correct	688 ms	4240 KB	Output is correct
16	Correct	699 ms	4244 KB	Output is correct
17	Correct	676 ms	4244 KB	Output is correct
18	Correct	671 ms	4244 KB	Output is correct
19	Correct	681 ms	4244 KB	Output is correct
20	Correct	672 ms	4244 KB	Output is correct

Subtask #5

0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	340 KB	Output is correct
2	Correct	1 ms	340 KB	Output is correct
3	Correct	1 ms	340 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	1 ms	340 KB	Output is correct
6	Correct	0 ms	312 KB	Output is correct
7	Correct	0 ms	212 KB	Output is correct
8	Correct	0 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	0 ms	340 KB	Output is correct
11	Correct	1 ms	212 KB	Output is correct
12	Correct	1 ms	212 KB	Output is correct
13	Correct	0 ms	312 KB	Output is correct
14	Correct	1 ms	212 KB	Output is correct
15	Correct	1 ms	340 KB	Output is correct
16	Correct	0 ms	340 KB	Output is correct
17	Correct	0 ms	212 KB	Output is correct
18	Correct	1 ms	340 KB	Output is correct
19	Correct	592 ms	4244 KB	Output is correct
20	Correct	585 ms	4240 KB	Output is correct
21	Correct	1 ms	312 KB	Output is correct
22	Correct	704 ms	4244 KB	Output is correct
23	Correct	700 ms	4248 KB	Output is correct
24	Correct	698 ms	4248 KB	Output is correct
25	Correct	701 ms	4244 KB	Output is correct
26	Correct	705 ms	4240 KB	Output is correct
27	Correct	688 ms	4240 KB	Output is correct
28	Correct	666 ms	4244 KB	Output is correct
29	Correct	676 ms	4244 KB	Output is correct
30	Runtime error	96 ms	25424 KB	Execution killed with signal 11
31	Halted	0 ms	0 KB	-