oj.uz

Submission #388516

# Submission time Handle Problem Language Result Execution time Memory
388516 2021-04-11T20:26:37 Z luciocf Group Photo (JOI21_ho_t3) C++14
100 / 100
 922 ms 67552 KB 
#include <bits/stdc++.h>

using namespace std;

const int maxn = 5e3+10;
const int inf = 1e9+10;

struct FenwickTree
{
	int bit[maxn];

	void upd(int x, int v)
	{
		for (; x < maxn; x += (x&-x))
			bit[x] += v;
	}

	int soma(int x)
	{
		int ans = 0;
		for (; x > 0; x -= (x&-x))
			ans += bit[x];
		return ans;
	}

	int get(int l, int r)
	{
		if (l > r) return 0;
		return soma(r) - soma(l-1);
	}
} BIT[2];

int a[maxn];
int val[maxn][maxn];

int dp[maxn];

int main(void)
{
	int n;
	scanf("%d", &n);

	for (int i = 1; i <= n; i++)
	{
		int x;
		scanf("%d", &x);

		a[x] = i;
	}

	for (int l = 1; l <= n; l++)
	{
		memset(BIT[0].bit, 0, sizeof BIT[0].bit);
		memset(BIT[1].bit, 0, sizeof BIT[1].bit);

		for (int i = l; i <= n; i++)
			BIT[0].upd(a[i], 1);

		for (int r = l; r <= n; r++)
		{
			val[l][r] = val[l][r-1];
			val[l][r] -= BIT[1].get(a[r]+1, n);
			val[l][r] += BIT[0].get(1, a[r]-1);

			BIT[1].upd(a[r], 1);
		}
	}

	for (int i = 1; i <= n; i++)
	{
		dp[i] = inf;

		for (int j = 1; j <= i; j++)
			dp[i] = min(dp[i], val[j][i] + dp[j-1]);
	}

	printf("%d\n", dp[n]);
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:41:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   41 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
Main.cpp:46:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   46 |   scanf("%d", &x);
      |   ~~~~~^~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 300 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 300 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 460 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct

Subtask #3
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 300 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 460 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 2 ms 1100 KB Output is correct
22 Correct 2 ms 1228 KB Output is correct
23 Correct 3 ms 1100 KB Output is correct
24 Correct 2 ms 1228 KB Output is correct
25 Correct 3 ms 1228 KB Output is correct
26 Correct 2 ms 1228 KB Output is correct
27 Correct 2 ms 1228 KB Output is correct
28 Correct 2 ms 1232 KB Output is correct
29 Correct 2 ms 1228 KB Output is correct
30 Correct 2 ms 1228 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 300 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 460 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 2 ms 1100 KB Output is correct
22 Correct 2 ms 1228 KB Output is correct
23 Correct 3 ms 1100 KB Output is correct
24 Correct 2 ms 1228 KB Output is correct
25 Correct 3 ms 1228 KB Output is correct
26 Correct 2 ms 1228 KB Output is correct
27 Correct 2 ms 1228 KB Output is correct
28 Correct 2 ms 1232 KB Output is correct
29 Correct 2 ms 1228 KB Output is correct
30 Correct 2 ms 1228 KB Output is correct
31 Correct 22 ms 4704 KB Output is correct
32 Correct 27 ms 4716 KB Output is correct
33 Correct 27 ms 4808 KB Output is correct
34 Correct 21 ms 4812 KB Output is correct
35 Correct 21 ms 4688 KB Output is correct
36 Correct 21 ms 4744 KB Output is correct
37 Correct 22 ms 4720 KB Output is correct
38 Correct 22 ms 4712 KB Output is correct
39 Correct 22 ms 4712 KB Output is correct
40 Correct 22 ms 4772 KB Output is correct

Subtask #5
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 300 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 460 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 2 ms 1100 KB Output is correct
22 Correct 2 ms 1228 KB Output is correct
23 Correct 3 ms 1100 KB Output is correct
24 Correct 2 ms 1228 KB Output is correct
25 Correct 3 ms 1228 KB Output is correct
26 Correct 2 ms 1228 KB Output is correct
27 Correct 2 ms 1228 KB Output is correct
28 Correct 2 ms 1232 KB Output is correct
29 Correct 2 ms 1228 KB Output is correct
30 Correct 2 ms 1228 KB Output is correct
31 Correct 22 ms 4704 KB Output is correct
32 Correct 27 ms 4716 KB Output is correct
33 Correct 27 ms 4808 KB Output is correct
34 Correct 21 ms 4812 KB Output is correct
35 Correct 21 ms 4688 KB Output is correct
36 Correct 21 ms 4744 KB Output is correct
37 Correct 22 ms 4720 KB Output is correct
38 Correct 22 ms 4712 KB Output is correct
39 Correct 22 ms 4712 KB Output is correct
40 Correct 22 ms 4772 KB Output is correct
41 Correct 917 ms 67224 KB Output is correct
42 Correct 890 ms 67332 KB Output is correct
43 Correct 887 ms 67368 KB Output is correct
44 Correct 886 ms 67304 KB Output is correct
45 Correct 889 ms 67332 KB Output is correct
46 Correct 901 ms 67360 KB Output is correct
47 Correct 873 ms 67552 KB Output is correct
48 Correct 892 ms 67388 KB Output is correct
49 Correct 875 ms 67364 KB Output is correct
50 Correct 870 ms 67432 KB Output is correct
51 Correct 864 ms 67340 KB Output is correct
52 Correct 922 ms 67256 KB Output is correct
53 Correct 901 ms 67380 KB Output is correct
54 Correct 917 ms 67364 KB Output is correct
55 Correct 876 ms 67332 KB Output is correct