oj.uz

Submission #629962

# Submission time Handle Problem Language Result Execution time Memory
629962 2022-08-15T12:39:59 Z QwertyPi Group Photo (JOI21_ho_t3) C++14
100 / 100
 1024 ms 67520 KB 
#include <bits/stdc++.h>
#define fi first
#define se second
using namespace std;

const int N = 5001;
int h[N];
int h_i[N];
int dp[N][N];
int dp2[N];

struct BIT{
	int bit[N];
	BIT() = default;
	BIT(int n){
		fill(bit, bit + n, 0);
	}
	void clear(int n){
		fill(bit, bit + n, 0);
	}
	void upd(int x, int v){
		for(int i = x; i < N; i = i | (i + 1)){
			bit[i] += v;
		}
	}
	int qry(int x){
		int ret = 0;
		for(int i = x; i >= 0; i = (i & (i + 1)) - 1){
			ret += bit[i];
		}
		return ret;
	}
};

int32_t main(){
	int n;
	cin >> n;
	for(int i = 0; i < n; i++){
		cin >> h[i];
		h_i[h[i]] = i;
	}
	for(int sm = 1; sm <= n; sm++){
		BIT bit(n);
		int cnt;
		
		cnt = 0;
		for(int i = sm; i <= n; i++){
			bit.upd(h_i[i], 1);
		}
		for(int i = sm; i <= n; i++){
			cnt += bit.qry(h_i[i] - 1);
			bit.upd(h_i[i], -1);
			dp[i][sm] = cnt;
		}
		bit.clear(n);
		cnt = 0;
		for(int i = sm; i <= n; i++){
			cnt += bit.qry(h_i[i] - 1);
			bit.upd(h_i[i], 1);
			dp[i][sm] += cnt;
		}

		bit.clear(n);
		cnt = 0;
		for(int i = sm; i <= n; i++){
			cnt += (i - sm) - bit.qry(h_i[i]);
			bit.upd(h_i[i], 1);
			dp[i][sm] -= cnt;
		}
	}
	fill(dp2 + 1, dp2 + n + 1, (1 << 30));
	for(int i = 0; i < n; i++){
		for(int j = 0; j <= i; j++){
			dp2[i + 1] = min(dp2[i + 1], dp2[j] + dp[i + 1][j + 1]);
		}
	}
	cout << dp2[n] << endl;
}

Subtask #1
5.0 / 5.0

# 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 320 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 328 KB Output is correct
7 Correct 1 ms 324 KB Output is correct
8 Correct 1 ms 316 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct

Subtask #2
7.0 / 7.0

# 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 320 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 328 KB Output is correct
7 Correct 1 ms 324 KB Output is correct
8 Correct 1 ms 316 KB Output is correct
9 Correct 0 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 328 KB Output is correct
13 Correct 1 ms 324 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 320 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct

Subtask #3
32.0 / 32.0

# 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 320 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 328 KB Output is correct
7 Correct 1 ms 324 KB Output is correct
8 Correct 1 ms 316 KB Output is correct
9 Correct 0 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 328 KB Output is correct
13 Correct 1 ms 324 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 320 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 2 ms 1108 KB Output is correct
22 Correct 2 ms 1092 KB Output is correct
23 Correct 2 ms 1108 KB Output is correct
24 Correct 2 ms 1108 KB Output is correct
25 Correct 2 ms 1220 KB Output is correct
26 Correct 2 ms 1108 KB Output is correct
27 Correct 2 ms 1108 KB Output is correct
28 Correct 2 ms 1108 KB Output is correct
29 Correct 2 ms 1108 KB Output is correct
30 Correct 3 ms 1108 KB Output is correct

Subtask #4
20.0 / 20.0

# 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 320 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 328 KB Output is correct
7 Correct 1 ms 324 KB Output is correct
8 Correct 1 ms 316 KB Output is correct
9 Correct 0 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 328 KB Output is correct
13 Correct 1 ms 324 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 320 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 2 ms 1108 KB Output is correct
22 Correct 2 ms 1092 KB Output is correct
23 Correct 2 ms 1108 KB Output is correct
24 Correct 2 ms 1108 KB Output is correct
25 Correct 2 ms 1220 KB Output is correct
26 Correct 2 ms 1108 KB Output is correct
27 Correct 2 ms 1108 KB Output is correct
28 Correct 2 ms 1108 KB Output is correct
29 Correct 2 ms 1108 KB Output is correct
30 Correct 3 ms 1108 KB Output is correct
31 Correct 24 ms 4708 KB Output is correct
32 Correct 26 ms 4788 KB Output is correct
33 Correct 24 ms 4808 KB Output is correct
34 Correct 27 ms 4744 KB Output is correct
35 Correct 24 ms 4696 KB Output is correct
36 Correct 24 ms 4820 KB Output is correct
37 Correct 25 ms 4816 KB Output is correct
38 Correct 24 ms 4692 KB Output is correct
39 Correct 25 ms 4808 KB Output is correct
40 Correct 24 ms 4736 KB Output is correct

Subtask #5
36.0 / 36.0

# 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 320 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 328 KB Output is correct
7 Correct 1 ms 324 KB Output is correct
8 Correct 1 ms 316 KB Output is correct
9 Correct 0 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 328 KB Output is correct
13 Correct 1 ms 324 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 320 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 2 ms 1108 KB Output is correct
22 Correct 2 ms 1092 KB Output is correct
23 Correct 2 ms 1108 KB Output is correct
24 Correct 2 ms 1108 KB Output is correct
25 Correct 2 ms 1220 KB Output is correct
26 Correct 2 ms 1108 KB Output is correct
27 Correct 2 ms 1108 KB Output is correct
28 Correct 2 ms 1108 KB Output is correct
29 Correct 2 ms 1108 KB Output is correct
30 Correct 3 ms 1108 KB Output is correct
31 Correct 24 ms 4708 KB Output is correct
32 Correct 26 ms 4788 KB Output is correct
33 Correct 24 ms 4808 KB Output is correct
34 Correct 27 ms 4744 KB Output is correct
35 Correct 24 ms 4696 KB Output is correct
36 Correct 24 ms 4820 KB Output is correct
37 Correct 25 ms 4816 KB Output is correct
38 Correct 24 ms 4692 KB Output is correct
39 Correct 25 ms 4808 KB Output is correct
40 Correct 24 ms 4736 KB Output is correct
41 Correct 973 ms 67420 KB Output is correct
42 Correct 989 ms 67264 KB Output is correct
43 Correct 1024 ms 67432 KB Output is correct
44 Correct 972 ms 67416 KB Output is correct
45 Correct 965 ms 67416 KB Output is correct
46 Correct 977 ms 67272 KB Output is correct
47 Correct 969 ms 67520 KB Output is correct
48 Correct 965 ms 67400 KB Output is correct
49 Correct 989 ms 67356 KB Output is correct
50 Correct 994 ms 67292 KB Output is correct
51 Correct 981 ms 67264 KB Output is correct
52 Correct 984 ms 67320 KB Output is correct
53 Correct 978 ms 67396 KB Output is correct
54 Correct 967 ms 67352 KB Output is correct
55 Correct 980 ms 67272 KB Output is correct