oj.uz

Submission #620850

# Submission time Handle Problem Language Result Execution time Memory
620850 2022-08-03T09:45:20 Z patrikpavic2 Group Photo (JOI21_ho_t3) C++17
100 / 100
 979 ms 233600 KB 
#include <cstdio>
#include <algorithm>

using namespace std;

const int N = 5050;

int n, A[N], P[N][N], inv[N][N], pos[N], dp[N], vec[N][N];

int main(){
	scanf("%d", &n);
	for(int i = 0;i < n;i++){
		scanf("%d", A + i), A[i]--;
		pos[A[i]] = i;
	}
	for(int i = 0;i < n;i++){
		if(i){
			for(int j = 0;j < n;j++)
				P[i][j] = P[i - 1][j];
		}
		for(int j = A[i];j < n;j++)
			P[i][j]++;
	}
	for(int r = 0;r < n;r++){
		inv[r][r] = 0; vec[r][r] = P[pos[r]][n - 1] - P[pos[r]][r];
		for(int l = r - 1;l >= 0;l--){
			inv[l][r] = inv[l + 1][r];
			vec[l][r] = vec[l + 1][r];
			inv[l][r] += P[pos[l]][r] - P[pos[l]][l];
			vec[l][r] += P[pos[l]][n - 1] - P[pos[l]][r];
		}
	}
	for(int i = 0;i < n;i++){
		dp[i] = i * (i + 1) / 2 - inv[0][i] + vec[0][i];
		for(int j = 0;j < i;j++){
			dp[i] = min(dp[i], dp[j] + (i - j) * (i - j - 1) / 2 - inv[j + 1][i] + vec[j + 1][i]);
		}
	}
	printf("%d\n", dp[n - 1]);
	return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:11:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
Main.cpp:13:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |   scanf("%d", A + i), A[i]--;
      |   ~~~~~^~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 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 296 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 292 KB Output is correct
6 Correct 0 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 424 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 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 296 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 292 KB Output is correct
6 Correct 0 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 424 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 0 ms 548 KB Output is correct
16 Correct 1 ms 552 KB Output is correct
17 Correct 1 ms 548 KB Output is correct
18 Correct 0 ms 548 KB Output is correct
19 Correct 0 ms 468 KB Output is correct
20 Correct 0 ms 468 KB Output is correct

Subtask #3
32.0 / 32.0

# 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 296 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 292 KB Output is correct
6 Correct 0 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 424 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 0 ms 548 KB Output is correct
16 Correct 1 ms 552 KB Output is correct
17 Correct 1 ms 548 KB Output is correct
18 Correct 0 ms 548 KB Output is correct
19 Correct 0 ms 468 KB Output is correct
20 Correct 0 ms 468 KB Output is correct
21 Correct 1 ms 2900 KB Output is correct
22 Correct 1 ms 3028 KB Output is correct
23 Correct 2 ms 2984 KB Output is correct
24 Correct 2 ms 3028 KB Output is correct
25 Correct 2 ms 2984 KB Output is correct
26 Correct 2 ms 2984 KB Output is correct
27 Correct 2 ms 3028 KB Output is correct
28 Correct 2 ms 3028 KB Output is correct
29 Correct 2 ms 2980 KB Output is correct
30 Correct 1 ms 3028 KB Output is correct

Subtask #4
20.0 / 20.0

# 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 296 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 292 KB Output is correct
6 Correct 0 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 424 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 0 ms 548 KB Output is correct
16 Correct 1 ms 552 KB Output is correct
17 Correct 1 ms 548 KB Output is correct
18 Correct 0 ms 548 KB Output is correct
19 Correct 0 ms 468 KB Output is correct
20 Correct 0 ms 468 KB Output is correct
21 Correct 1 ms 2900 KB Output is correct
22 Correct 1 ms 3028 KB Output is correct
23 Correct 2 ms 2984 KB Output is correct
24 Correct 2 ms 3028 KB Output is correct
25 Correct 2 ms 2984 KB Output is correct
26 Correct 2 ms 2984 KB Output is correct
27 Correct 2 ms 3028 KB Output is correct
28 Correct 2 ms 3028 KB Output is correct
29 Correct 2 ms 2980 KB Output is correct
30 Correct 1 ms 3028 KB Output is correct
31 Correct 17 ms 14864 KB Output is correct
32 Correct 17 ms 14936 KB Output is correct
33 Correct 21 ms 14924 KB Output is correct
34 Correct 25 ms 15020 KB Output is correct
35 Correct 20 ms 14932 KB Output is correct
36 Correct 18 ms 14932 KB Output is correct
37 Correct 25 ms 14924 KB Output is correct
38 Correct 19 ms 14924 KB Output is correct
39 Correct 24 ms 14924 KB Output is correct
40 Correct 19 ms 14872 KB Output is correct

Subtask #5
36.0 / 36.0

# 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 296 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 292 KB Output is correct
6 Correct 0 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 424 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 0 ms 548 KB Output is correct
16 Correct 1 ms 552 KB Output is correct
17 Correct 1 ms 548 KB Output is correct
18 Correct 0 ms 548 KB Output is correct
19 Correct 0 ms 468 KB Output is correct
20 Correct 0 ms 468 KB Output is correct
21 Correct 1 ms 2900 KB Output is correct
22 Correct 1 ms 3028 KB Output is correct
23 Correct 2 ms 2984 KB Output is correct
24 Correct 2 ms 3028 KB Output is correct
25 Correct 2 ms 2984 KB Output is correct
26 Correct 2 ms 2984 KB Output is correct
27 Correct 2 ms 3028 KB Output is correct
28 Correct 2 ms 3028 KB Output is correct
29 Correct 2 ms 2980 KB Output is correct
30 Correct 1 ms 3028 KB Output is correct
31 Correct 17 ms 14864 KB Output is correct
32 Correct 17 ms 14936 KB Output is correct
33 Correct 21 ms 14924 KB Output is correct
34 Correct 25 ms 15020 KB Output is correct
35 Correct 20 ms 14932 KB Output is correct
36 Correct 18 ms 14932 KB Output is correct
37 Correct 25 ms 14924 KB Output is correct
38 Correct 19 ms 14924 KB Output is correct
39 Correct 24 ms 14924 KB Output is correct
40 Correct 19 ms 14872 KB Output is correct
41 Correct 889 ms 233316 KB Output is correct
42 Correct 891 ms 233372 KB Output is correct
43 Correct 919 ms 233396 KB Output is correct
44 Correct 892 ms 233420 KB Output is correct
45 Correct 979 ms 233456 KB Output is correct
46 Correct 954 ms 233488 KB Output is correct
47 Correct 893 ms 233420 KB Output is correct
48 Correct 900 ms 233496 KB Output is correct
49 Correct 898 ms 233496 KB Output is correct
50 Correct 894 ms 233508 KB Output is correct
51 Correct 891 ms 233600 KB Output is correct
52 Correct 880 ms 233592 KB Output is correct
53 Correct 910 ms 233532 KB Output is correct
54 Correct 957 ms 233556 KB Output is correct
55 Correct 896 ms 233548 KB Output is correct