oj.uz

Submission #371243

# Submission time Handle Problem Language Result Execution time Memory
371243 2021-02-26T09:29:42 Z nafis_shifat Group Photo (JOI21_ho_t3) C++14
100 / 100
 1422 ms 234860 KB 
#include<bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
using namespace std;
const int mxn=5e3+5;
const int inf=1e9;
int h[mxn];
int pos[mxn];

ll dp1[mxn][mxn] = {};
ll dp2[mxn][mxn] = {};
struct BIT
{
	int bit[mxn];
	void init() {
		memset(bit,0,sizeof bit);
	}	

	void update(int p,int v) {
		if(p==0) return;
		for(;p > 0;p -=p&-p) bit[p] += v;
	}
    int query(int p) {
    	int r=0;
    	for(;p < mxn; p +=p&-p) r += bit[p];
        return r;
    }
} bt;
ll rev(int l,int r) {
	int p = l;

	bt.init();

	for(int i = 1; i < l; i++) bt.update(pos[i],1);
	ll tot = 0;
	for(int i = r; i >= l; i--) {
		tot += bt.query(pos[i]);
		bt.update(pos[i],1);		
	}
	return tot;
}



ll sor(int l,int r) {
	int p = l;

	bt.init();

	for(int i = 1; i < l; i++) bt.update(pos[i],1);
	ll tot = 0;
	for(int i = l; i <= r; i++) {
		tot += bt.query(pos[i]);
		bt.update(pos[i],1);		
	}

	return tot;
}
int main() {
	int n;
	cin >> n;

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

	BIT bt1;
	bt1.init();

	for(int i = 1; i <= n; i++) {
		bt.init();
		for(int j = i; j <= n; j++) {
			ll v1 = bt1.query(pos[j]);
			ll v2 = j - i - bt.query(pos[j]);
			bt.update(pos[j],1);
			dp1[i][j] = dp1[i][j - 1] + v1 + v2;
		}
		bt1.update(pos[i],1);
	}

   
	for(int i = 1; i <= n; i++) {
		bt.init();
		for(int j = 1; j < i; j++) {
			bt.update(pos[j],1);
		}
		for(int j = i; j <= n; j++) {
			dp2[i][j] = dp2[i][j - 1] + bt.query(pos[j]);
			bt.update(pos[j],1);
		}
	}

	ll dp[n + 1];
	dp[0] = 0;

	for(int i = 1; i <= n; i++) {
		dp[i] = inf;
		for(int j = i; j >= 1; j--) {
			dp[i] = min(dp[i],dp[j - 1] + min(dp1[j][i],dp2[j][i]));
		}
	}

	cout<<dp[n]<<endl;


}

Compilation message

Main.cpp: In function 'long long int rev(int, int)':
Main.cpp:30:6: warning: unused variable 'p' [-Wunused-variable]
   30 |  int p = l;
      |      ^
Main.cpp: In function 'long long int sor(int, int)':
Main.cpp:46:6: warning: unused variable 'p' [-Wunused-variable]
   46 |  int p = l;
      |      ^

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 364 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 492 KB Output is correct
6 Correct 1 ms 512 KB Output is correct
7 Correct 1 ms 492 KB Output is correct
8 Correct 1 ms 492 KB Output is correct
9 Correct 1 ms 492 KB Output is correct
10 Correct 1 ms 492 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 364 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 492 KB Output is correct
6 Correct 1 ms 512 KB Output is correct
7 Correct 1 ms 492 KB Output is correct
8 Correct 1 ms 492 KB Output is correct
9 Correct 1 ms 492 KB Output is correct
10 Correct 1 ms 492 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 364 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 492 KB Output is correct
6 Correct 1 ms 512 KB Output is correct
7 Correct 1 ms 492 KB Output is correct
8 Correct 1 ms 492 KB Output is correct
9 Correct 1 ms 492 KB Output is correct
10 Correct 1 ms 492 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 4 ms 2284 KB Output is correct
22 Correct 4 ms 2284 KB Output is correct
23 Correct 4 ms 2432 KB Output is correct
24 Correct 4 ms 2284 KB Output is correct
25 Correct 4 ms 2284 KB Output is correct
26 Correct 4 ms 2284 KB Output is correct
27 Correct 4 ms 2284 KB Output is correct
28 Correct 4 ms 2284 KB Output is correct
29 Correct 4 ms 2284 KB Output is correct
30 Correct 4 ms 2284 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 364 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 492 KB Output is correct
6 Correct 1 ms 512 KB Output is correct
7 Correct 1 ms 492 KB Output is correct
8 Correct 1 ms 492 KB Output is correct
9 Correct 1 ms 492 KB Output is correct
10 Correct 1 ms 492 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 4 ms 2284 KB Output is correct
22 Correct 4 ms 2284 KB Output is correct
23 Correct 4 ms 2432 KB Output is correct
24 Correct 4 ms 2284 KB Output is correct
25 Correct 4 ms 2284 KB Output is correct
26 Correct 4 ms 2284 KB Output is correct
27 Correct 4 ms 2284 KB Output is correct
28 Correct 4 ms 2284 KB Output is correct
29 Correct 4 ms 2284 KB Output is correct
30 Correct 4 ms 2284 KB Output is correct
31 Correct 37 ms 11884 KB Output is correct
32 Correct 34 ms 11884 KB Output is correct
33 Correct 35 ms 11884 KB Output is correct
34 Correct 35 ms 11884 KB Output is correct
35 Correct 34 ms 11884 KB Output is correct
36 Correct 34 ms 11884 KB Output is correct
37 Correct 35 ms 12012 KB Output is correct
38 Correct 35 ms 11884 KB Output is correct
39 Correct 34 ms 11884 KB Output is correct
40 Correct 34 ms 11884 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 364 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 492 KB Output is correct
6 Correct 1 ms 512 KB Output is correct
7 Correct 1 ms 492 KB Output is correct
8 Correct 1 ms 492 KB Output is correct
9 Correct 1 ms 492 KB Output is correct
10 Correct 1 ms 492 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 4 ms 2284 KB Output is correct
22 Correct 4 ms 2284 KB Output is correct
23 Correct 4 ms 2432 KB Output is correct
24 Correct 4 ms 2284 KB Output is correct
25 Correct 4 ms 2284 KB Output is correct
26 Correct 4 ms 2284 KB Output is correct
27 Correct 4 ms 2284 KB Output is correct
28 Correct 4 ms 2284 KB Output is correct
29 Correct 4 ms 2284 KB Output is correct
30 Correct 4 ms 2284 KB Output is correct
31 Correct 37 ms 11884 KB Output is correct
32 Correct 34 ms 11884 KB Output is correct
33 Correct 35 ms 11884 KB Output is correct
34 Correct 35 ms 11884 KB Output is correct
35 Correct 34 ms 11884 KB Output is correct
36 Correct 34 ms 11884 KB Output is correct
37 Correct 35 ms 12012 KB Output is correct
38 Correct 35 ms 11884 KB Output is correct
39 Correct 34 ms 11884 KB Output is correct
40 Correct 34 ms 11884 KB Output is correct
41 Correct 1400 ms 234476 KB Output is correct
42 Correct 1402 ms 234476 KB Output is correct
43 Correct 1422 ms 234428 KB Output is correct
44 Correct 1406 ms 234520 KB Output is correct
45 Correct 1403 ms 234348 KB Output is correct
46 Correct 1402 ms 234604 KB Output is correct
47 Correct 1416 ms 234732 KB Output is correct
48 Correct 1399 ms 234860 KB Output is correct
49 Correct 1420 ms 234476 KB Output is correct
50 Correct 1410 ms 234732 KB Output is correct
51 Correct 1415 ms 234732 KB Output is correct
52 Correct 1408 ms 234604 KB Output is correct
53 Correct 1407 ms 234720 KB Output is correct
54 Correct 1403 ms 234476 KB Output is correct
55 Correct 1404 ms 234508 KB Output is correct