oj.uz

Submission #371232

# Submission time Handle Problem Language Result Execution time Memory
371232 2021-02-26T08:40:11 Z cheissmart Group Photo (JOI21_ho_t3) C++14
100 / 100
 1530 ms 67748 KB 
#include <bits/stdc++.h>
#define IO_OP std::ios::sync_with_stdio(0); std::cin.tie(0);
#define F first
#define S second
#define V vector
#define PB push_back
#define MP make_pair
#define EB emplace_back
#define ALL(v) (v).begin(), (v).end()
#define debug(x) cerr << "Line(" << __LINE__ << ") -> " << #x << " is " << x << endl

using namespace std;

typedef long long ll;
typedef pair<int, int> pi;
typedef V<int> vi;

const int INF = 1e9 + 7, N = 5005;

int a[N], p[N], dp[N], cost[N][N];

struct BIT {
	int bit[N];
	BIT() {
		memset(bit, 0, sizeof bit);
	}
	void add(int pos, int val) {
		for(; pos < N; pos += pos & -pos)
			bit[pos] += val;
	}
	int qry(int pos) {
		int res = 0;
		for(; pos; pos -= pos & -pos)
			res += bit[pos];
		return res;
	}
} b1, b2;

signed main()
{
	IO_OP;

	int n;
	cin >> n;
	for(int i = 1; i <= n; i++) {
		cin >> a[i];
		p[a[i]] = i;
	}

	for(int r = 1; r <= n; r++) {
		for(int i = 1; i <= r; i++) b1.add(p[i], 1);
		int ans = 0;
		for(int l = r; l >= 1; l--) {
			ans += b1.qry(n) - b1.qry(p[l]);
			ans -= b2.qry(p[l]);
			cost[l][r] = ans;
			b2.add(p[l], 1);
		}
		for(int l = r; l >= 1; l--) b2.add(p[l], -1);
		for(int i = 1; i <= r; i++) b1.add(p[i], -1);
	}

	dp[0] = 0;
	for(int i = 1; i <= n; i++) {
		dp[i] = INF;
		for(int j = 1; j <= i; j++) {
			dp[i] = min(dp[i], dp[j - 1] + cost[j][i]);
		}
	}
	cout << dp[n] << endl;

}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 492 KB Output is correct
12 Correct 1 ms 492 KB Output is correct
13 Correct 1 ms 492 KB Output is correct
14 Correct 1 ms 492 KB Output is correct
15 Correct 1 ms 492 KB Output is correct
16 Correct 1 ms 492 KB Output is correct
17 Correct 1 ms 492 KB Output is correct
18 Correct 1 ms 492 KB Output is correct
19 Correct 1 ms 492 KB Output is correct
20 Correct 1 ms 492 KB Output is correct

Subtask #3
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 492 KB Output is correct
12 Correct 1 ms 492 KB Output is correct
13 Correct 1 ms 492 KB Output is correct
14 Correct 1 ms 492 KB Output is correct
15 Correct 1 ms 492 KB Output is correct
16 Correct 1 ms 492 KB Output is correct
17 Correct 1 ms 492 KB Output is correct
18 Correct 1 ms 492 KB Output is correct
19 Correct 1 ms 492 KB Output is correct
20 Correct 1 ms 492 KB Output is correct
21 Correct 3 ms 1260 KB Output is correct
22 Correct 3 ms 1260 KB Output is correct
23 Correct 3 ms 1260 KB Output is correct
24 Correct 3 ms 1260 KB Output is correct
25 Correct 3 ms 1260 KB Output is correct
26 Correct 3 ms 1260 KB Output is correct
27 Correct 3 ms 1260 KB Output is correct
28 Correct 3 ms 1260 KB Output is correct
29 Correct 3 ms 1260 KB Output is correct
30 Correct 3 ms 1260 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 492 KB Output is correct
12 Correct 1 ms 492 KB Output is correct
13 Correct 1 ms 492 KB Output is correct
14 Correct 1 ms 492 KB Output is correct
15 Correct 1 ms 492 KB Output is correct
16 Correct 1 ms 492 KB Output is correct
17 Correct 1 ms 492 KB Output is correct
18 Correct 1 ms 492 KB Output is correct
19 Correct 1 ms 492 KB Output is correct
20 Correct 1 ms 492 KB Output is correct
21 Correct 3 ms 1260 KB Output is correct
22 Correct 3 ms 1260 KB Output is correct
23 Correct 3 ms 1260 KB Output is correct
24 Correct 3 ms 1260 KB Output is correct
25 Correct 3 ms 1260 KB Output is correct
26 Correct 3 ms 1260 KB Output is correct
27 Correct 3 ms 1260 KB Output is correct
28 Correct 3 ms 1260 KB Output is correct
29 Correct 3 ms 1260 KB Output is correct
30 Correct 3 ms 1260 KB Output is correct
31 Correct 34 ms 4844 KB Output is correct
32 Correct 37 ms 4844 KB Output is correct
33 Correct 34 ms 4844 KB Output is correct
34 Correct 37 ms 4844 KB Output is correct
35 Correct 34 ms 4972 KB Output is correct
36 Correct 33 ms 4844 KB Output is correct
37 Correct 34 ms 4844 KB Output is correct
38 Correct 33 ms 4844 KB Output is correct
39 Correct 33 ms 4844 KB Output is correct
40 Correct 33 ms 4844 KB Output is correct

Subtask #5
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 492 KB Output is correct
12 Correct 1 ms 492 KB Output is correct
13 Correct 1 ms 492 KB Output is correct
14 Correct 1 ms 492 KB Output is correct
15 Correct 1 ms 492 KB Output is correct
16 Correct 1 ms 492 KB Output is correct
17 Correct 1 ms 492 KB Output is correct
18 Correct 1 ms 492 KB Output is correct
19 Correct 1 ms 492 KB Output is correct
20 Correct 1 ms 492 KB Output is correct
21 Correct 3 ms 1260 KB Output is correct
22 Correct 3 ms 1260 KB Output is correct
23 Correct 3 ms 1260 KB Output is correct
24 Correct 3 ms 1260 KB Output is correct
25 Correct 3 ms 1260 KB Output is correct
26 Correct 3 ms 1260 KB Output is correct
27 Correct 3 ms 1260 KB Output is correct
28 Correct 3 ms 1260 KB Output is correct
29 Correct 3 ms 1260 KB Output is correct
30 Correct 3 ms 1260 KB Output is correct
31 Correct 34 ms 4844 KB Output is correct
32 Correct 37 ms 4844 KB Output is correct
33 Correct 34 ms 4844 KB Output is correct
34 Correct 37 ms 4844 KB Output is correct
35 Correct 34 ms 4972 KB Output is correct
36 Correct 33 ms 4844 KB Output is correct
37 Correct 34 ms 4844 KB Output is correct
38 Correct 33 ms 4844 KB Output is correct
39 Correct 33 ms 4844 KB Output is correct
40 Correct 33 ms 4844 KB Output is correct
41 Correct 1480 ms 67308 KB Output is correct
42 Correct 1475 ms 67404 KB Output is correct
43 Correct 1478 ms 67436 KB Output is correct
44 Correct 1495 ms 67528 KB Output is correct
45 Correct 1530 ms 67356 KB Output is correct
46 Correct 1520 ms 67748 KB Output is correct
47 Correct 1459 ms 67436 KB Output is correct
48 Correct 1469 ms 67436 KB Output is correct
49 Correct 1480 ms 67356 KB Output is correct
50 Correct 1495 ms 67436 KB Output is correct
51 Correct 1456 ms 67468 KB Output is correct
52 Correct 1464 ms 67540 KB Output is correct
53 Correct 1469 ms 67692 KB Output is correct
54 Correct 1462 ms 67520 KB Output is correct
55 Correct 1455 ms 67436 KB Output is correct