oj.uz

Submission #752945

# Submission time Handle Problem Language Result Execution time Memory
752945 2023-06-04T10:26:08 Z IvanJ Group Photo (JOI21_ho_t3) C++17
100 / 100
 587 ms 160816 KB 
#include<bits/stdc++.h>

#define x first
#define y second
#define pb push_back
#define all(a) (a).begin(), (a).end()

using namespace std;

typedef long long ll;
typedef pair<int, int> ii;

const int maxn = 5e3 + 5;

int n, ans = 0;
int h[maxn];
int dp[maxn];

int solve(int N) {
	if(N < 2) return 0;
	if(dp[N] != -1) return dp[N];
	
	vector<int> v;
	for(int i = 0;i < n;i++) 
		if(h[i] <= N) v.pb(h[i]);
	
	vector<int> pos(N + 1, 0);
	for(int i = 0;i < N;i++) pos[v[i]] = i;
	
	int ret = 1e9;
	int cost = 0;
	vector<int> fwt(N + 1, 0);
	for(int i = N;i >= 1;i--) {
		cost += i - pos[i] - 1;
		{
			for(int x = N;x > 0;x -= (x & -x)) cost += fwt[x];
			for(int x = pos[i] + 1;x > 0;x -= (x & -x)) cost -= fwt[x];
			for(int x = pos[i] + 1;x <= N;x += (x & -x)) fwt[x]++; 	
		}
		//cout << i << " " << cost << "\n";
		//cout << N << " " << i << " " << solve(i - 1) << " " << cost << "\n";
		ret = min(ret, solve(i - 1) + cost);
	}
	return dp[N] = ret;
}

int main() {
	scanf("%d", &n);
	for(int i = 0;i < n;i++) 
		scanf("%d", h + i);
	
	memset(dp, -1, sizeof dp);
	ans = solve(n);
	printf("%d\n", ans);
	return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:48:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
Main.cpp:50:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |   scanf("%d", h + i);
      |   ~~~~~^~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 304 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 304 KB Output is correct
6 Correct 1 ms 300 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 300 KB Output is correct
10 Correct 1 ms 212 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 304 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 304 KB Output is correct
6 Correct 1 ms 300 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 300 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 300 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 304 KB Output is correct
18 Correct 1 ms 304 KB Output is correct
19 Correct 1 ms 300 KB Output is correct
20 Correct 1 ms 212 KB Output is correct

Subtask #3
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 304 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 304 KB Output is correct
6 Correct 1 ms 300 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 300 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 300 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 304 KB Output is correct
18 Correct 1 ms 304 KB Output is correct
19 Correct 1 ms 300 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 2 ms 596 KB Output is correct
22 Correct 2 ms 596 KB Output is correct
23 Correct 1 ms 596 KB Output is correct
24 Correct 2 ms 564 KB Output is correct
25 Correct 2 ms 560 KB Output is correct
26 Correct 2 ms 564 KB Output is correct
27 Correct 2 ms 596 KB Output is correct
28 Correct 2 ms 596 KB Output is correct
29 Correct 2 ms 596 KB Output is correct
30 Correct 2 ms 596 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 304 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 304 KB Output is correct
6 Correct 1 ms 300 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 300 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 300 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 304 KB Output is correct
18 Correct 1 ms 304 KB Output is correct
19 Correct 1 ms 300 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 2 ms 596 KB Output is correct
22 Correct 2 ms 596 KB Output is correct
23 Correct 1 ms 596 KB Output is correct
24 Correct 2 ms 564 KB Output is correct
25 Correct 2 ms 560 KB Output is correct
26 Correct 2 ms 564 KB Output is correct
27 Correct 2 ms 596 KB Output is correct
28 Correct 2 ms 596 KB Output is correct
29 Correct 2 ms 596 KB Output is correct
30 Correct 2 ms 596 KB Output is correct
31 Correct 15 ms 4808 KB Output is correct
32 Correct 16 ms 4784 KB Output is correct
33 Correct 15 ms 4824 KB Output is correct
34 Correct 13 ms 4836 KB Output is correct
35 Correct 14 ms 4836 KB Output is correct
36 Correct 14 ms 4724 KB Output is correct
37 Correct 14 ms 4836 KB Output is correct
38 Correct 15 ms 4820 KB Output is correct
39 Correct 15 ms 4832 KB Output is correct
40 Correct 13 ms 4836 KB Output is correct

Subtask #5
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 304 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 304 KB Output is correct
6 Correct 1 ms 300 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 300 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 300 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 304 KB Output is correct
18 Correct 1 ms 304 KB Output is correct
19 Correct 1 ms 300 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 2 ms 596 KB Output is correct
22 Correct 2 ms 596 KB Output is correct
23 Correct 1 ms 596 KB Output is correct
24 Correct 2 ms 564 KB Output is correct
25 Correct 2 ms 560 KB Output is correct
26 Correct 2 ms 564 KB Output is correct
27 Correct 2 ms 596 KB Output is correct
28 Correct 2 ms 596 KB Output is correct
29 Correct 2 ms 596 KB Output is correct
30 Correct 2 ms 596 KB Output is correct
31 Correct 15 ms 4808 KB Output is correct
32 Correct 16 ms 4784 KB Output is correct
33 Correct 15 ms 4824 KB Output is correct
34 Correct 13 ms 4836 KB Output is correct
35 Correct 14 ms 4836 KB Output is correct
36 Correct 14 ms 4724 KB Output is correct
37 Correct 14 ms 4836 KB Output is correct
38 Correct 15 ms 4820 KB Output is correct
39 Correct 15 ms 4832 KB Output is correct
40 Correct 13 ms 4836 KB Output is correct
41 Correct 557 ms 160444 KB Output is correct
42 Correct 530 ms 160604 KB Output is correct
43 Correct 587 ms 160664 KB Output is correct
44 Correct 556 ms 160656 KB Output is correct
45 Correct 544 ms 160660 KB Output is correct
46 Correct 575 ms 160696 KB Output is correct
47 Correct 553 ms 160588 KB Output is correct
48 Correct 528 ms 160692 KB Output is correct
49 Correct 523 ms 160692 KB Output is correct
50 Correct 538 ms 160692 KB Output is correct
51 Correct 545 ms 160688 KB Output is correct
52 Correct 538 ms 160716 KB Output is correct
53 Correct 550 ms 160688 KB Output is correct
54 Correct 576 ms 160816 KB Output is correct
55 Correct 531 ms 160716 KB Output is correct