#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<pii> vpi;
typedef vector<pll> vpl;
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define pb push_back
const int MAXN = 5005;
int N, a[MAXN], pos[MAXN], DP[MAXN], pre[MAXN][MAXN];
int BIT_u[MAXN], BIT_p[MAXN];
void upd_u(int _pos)
{
for(; _pos <= N; _pos += _pos&-_pos)
BIT_u[_pos]++;
}
void upd_p(int _pos)
{
for(; _pos <= N; _pos += _pos&-_pos)
BIT_p[_pos]++;
}
int qry_u(int _pos)
{
int res = 0;
for(; _pos; _pos -= _pos&-_pos)
res += BIT_u[_pos];
return res;
}
int qry_p(int _pos)
{
int res = 0;
for(; _pos; _pos -= _pos&-_pos)
res += BIT_p[_pos];
return res;
}
int main()
{
cin >> N;
for(int i = 1; i <= N; i++)
{
cin >> a[i];
pos[a[i]] = i;
}
for(int i = 1; i <= N; i++)
{
for(int j = 1; j <= N; j++)
BIT_p[j] = 0;
pre[i][i] = qry_u(N) - qry_u(pos[i]);
upd_p(pos[i]);
for(int j = i + 1; j <= N; j++)
{
pre[i][j] = pre[i][j - 1] + qry_p(pos[j]) + qry_u(N) - qry_u(pos[j]);
upd_p(pos[j]);
}
upd_u(pos[i]);
}
DP[1] = 0;
for(int l = 2; l <= N; l++)
{
DP[l] = (1 << 30);
for(int j = l; j >= 1; j--)
DP[l] = min(DP[l], pre[j][l] + DP[j - 1]);
}
cout << DP[N] << "\n";
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
1 ms |
332 KB |
Output is correct |
| 3 |
Correct |
1 ms |
332 KB |
Output is correct |
| 4 |
Correct |
1 ms |
332 KB |
Output is correct |
| 5 |
Correct |
1 ms |
304 KB |
Output is correct |
| 6 |
Correct |
1 ms |
332 KB |
Output is correct |
| 7 |
Correct |
1 ms |
332 KB |
Output is correct |
| 8 |
Correct |
1 ms |
332 KB |
Output is correct |
| 9 |
Correct |
1 ms |
332 KB |
Output is correct |
| 10 |
Correct |
1 ms |
304 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
1 ms |
332 KB |
Output is correct |
| 3 |
Correct |
1 ms |
332 KB |
Output is correct |
| 4 |
Correct |
1 ms |
332 KB |
Output is correct |
| 5 |
Correct |
1 ms |
304 KB |
Output is correct |
| 6 |
Correct |
1 ms |
332 KB |
Output is correct |
| 7 |
Correct |
1 ms |
332 KB |
Output is correct |
| 8 |
Correct |
1 ms |
332 KB |
Output is correct |
| 9 |
Correct |
1 ms |
332 KB |
Output is correct |
| 10 |
Correct |
1 ms |
304 KB |
Output is correct |
| 11 |
Correct |
1 ms |
332 KB |
Output is correct |
| 12 |
Correct |
1 ms |
332 KB |
Output is correct |
| 13 |
Correct |
1 ms |
332 KB |
Output is correct |
| 14 |
Correct |
1 ms |
332 KB |
Output is correct |
| 15 |
Correct |
1 ms |
332 KB |
Output is correct |
| 16 |
Correct |
1 ms |
332 KB |
Output is correct |
| 17 |
Correct |
1 ms |
332 KB |
Output is correct |
| 18 |
Correct |
1 ms |
332 KB |
Output is correct |
| 19 |
Correct |
1 ms |
332 KB |
Output is correct |
| 20 |
Correct |
1 ms |
332 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
1 ms |
332 KB |
Output is correct |
| 3 |
Correct |
1 ms |
332 KB |
Output is correct |
| 4 |
Correct |
1 ms |
332 KB |
Output is correct |
| 5 |
Correct |
1 ms |
304 KB |
Output is correct |
| 6 |
Correct |
1 ms |
332 KB |
Output is correct |
| 7 |
Correct |
1 ms |
332 KB |
Output is correct |
| 8 |
Correct |
1 ms |
332 KB |
Output is correct |
| 9 |
Correct |
1 ms |
332 KB |
Output is correct |
| 10 |
Correct |
1 ms |
304 KB |
Output is correct |
| 11 |
Correct |
1 ms |
332 KB |
Output is correct |
| 12 |
Correct |
1 ms |
332 KB |
Output is correct |
| 13 |
Correct |
1 ms |
332 KB |
Output is correct |
| 14 |
Correct |
1 ms |
332 KB |
Output is correct |
| 15 |
Correct |
1 ms |
332 KB |
Output is correct |
| 16 |
Correct |
1 ms |
332 KB |
Output is correct |
| 17 |
Correct |
1 ms |
332 KB |
Output is correct |
| 18 |
Correct |
1 ms |
332 KB |
Output is correct |
| 19 |
Correct |
1 ms |
332 KB |
Output is correct |
| 20 |
Correct |
1 ms |
332 KB |
Output is correct |
| 21 |
Correct |
2 ms |
1124 KB |
Output is correct |
| 22 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 24 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 25 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 26 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1200 KB |
Output is correct |
| 28 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 29 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 30 |
Correct |
2 ms |
1100 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
1 ms |
332 KB |
Output is correct |
| 3 |
Correct |
1 ms |
332 KB |
Output is correct |
| 4 |
Correct |
1 ms |
332 KB |
Output is correct |
| 5 |
Correct |
1 ms |
304 KB |
Output is correct |
| 6 |
Correct |
1 ms |
332 KB |
Output is correct |
| 7 |
Correct |
1 ms |
332 KB |
Output is correct |
| 8 |
Correct |
1 ms |
332 KB |
Output is correct |
| 9 |
Correct |
1 ms |
332 KB |
Output is correct |
| 10 |
Correct |
1 ms |
304 KB |
Output is correct |
| 11 |
Correct |
1 ms |
332 KB |
Output is correct |
| 12 |
Correct |
1 ms |
332 KB |
Output is correct |
| 13 |
Correct |
1 ms |
332 KB |
Output is correct |
| 14 |
Correct |
1 ms |
332 KB |
Output is correct |
| 15 |
Correct |
1 ms |
332 KB |
Output is correct |
| 16 |
Correct |
1 ms |
332 KB |
Output is correct |
| 17 |
Correct |
1 ms |
332 KB |
Output is correct |
| 18 |
Correct |
1 ms |
332 KB |
Output is correct |
| 19 |
Correct |
1 ms |
332 KB |
Output is correct |
| 20 |
Correct |
1 ms |
332 KB |
Output is correct |
| 21 |
Correct |
2 ms |
1124 KB |
Output is correct |
| 22 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 24 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 25 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 26 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1200 KB |
Output is correct |
| 28 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 29 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 30 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 31 |
Correct |
12 ms |
4780 KB |
Output is correct |
| 32 |
Correct |
13 ms |
4812 KB |
Output is correct |
| 33 |
Correct |
13 ms |
4776 KB |
Output is correct |
| 34 |
Correct |
13 ms |
4772 KB |
Output is correct |
| 35 |
Correct |
12 ms |
4752 KB |
Output is correct |
| 36 |
Correct |
12 ms |
4812 KB |
Output is correct |
| 37 |
Correct |
12 ms |
4812 KB |
Output is correct |
| 38 |
Correct |
12 ms |
4800 KB |
Output is correct |
| 39 |
Correct |
12 ms |
4812 KB |
Output is correct |
| 40 |
Correct |
12 ms |
4812 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
1 ms |
332 KB |
Output is correct |
| 3 |
Correct |
1 ms |
332 KB |
Output is correct |
| 4 |
Correct |
1 ms |
332 KB |
Output is correct |
| 5 |
Correct |
1 ms |
304 KB |
Output is correct |
| 6 |
Correct |
1 ms |
332 KB |
Output is correct |
| 7 |
Correct |
1 ms |
332 KB |
Output is correct |
| 8 |
Correct |
1 ms |
332 KB |
Output is correct |
| 9 |
Correct |
1 ms |
332 KB |
Output is correct |
| 10 |
Correct |
1 ms |
304 KB |
Output is correct |
| 11 |
Correct |
1 ms |
332 KB |
Output is correct |
| 12 |
Correct |
1 ms |
332 KB |
Output is correct |
| 13 |
Correct |
1 ms |
332 KB |
Output is correct |
| 14 |
Correct |
1 ms |
332 KB |
Output is correct |
| 15 |
Correct |
1 ms |
332 KB |
Output is correct |
| 16 |
Correct |
1 ms |
332 KB |
Output is correct |
| 17 |
Correct |
1 ms |
332 KB |
Output is correct |
| 18 |
Correct |
1 ms |
332 KB |
Output is correct |
| 19 |
Correct |
1 ms |
332 KB |
Output is correct |
| 20 |
Correct |
1 ms |
332 KB |
Output is correct |
| 21 |
Correct |
2 ms |
1124 KB |
Output is correct |
| 22 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 24 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 25 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 26 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1200 KB |
Output is correct |
| 28 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 29 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 30 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 31 |
Correct |
12 ms |
4780 KB |
Output is correct |
| 32 |
Correct |
13 ms |
4812 KB |
Output is correct |
| 33 |
Correct |
13 ms |
4776 KB |
Output is correct |
| 34 |
Correct |
13 ms |
4772 KB |
Output is correct |
| 35 |
Correct |
12 ms |
4752 KB |
Output is correct |
| 36 |
Correct |
12 ms |
4812 KB |
Output is correct |
| 37 |
Correct |
12 ms |
4812 KB |
Output is correct |
| 38 |
Correct |
12 ms |
4800 KB |
Output is correct |
| 39 |
Correct |
12 ms |
4812 KB |
Output is correct |
| 40 |
Correct |
12 ms |
4812 KB |
Output is correct |
| 41 |
Correct |
648 ms |
67244 KB |
Output is correct |
| 42 |
Correct |
656 ms |
67648 KB |
Output is correct |
| 43 |
Correct |
666 ms |
67396 KB |
Output is correct |
| 44 |
Correct |
676 ms |
67364 KB |
Output is correct |
| 45 |
Correct |
669 ms |
67396 KB |
Output is correct |
| 46 |
Correct |
653 ms |
67396 KB |
Output is correct |
| 47 |
Correct |
649 ms |
67376 KB |
Output is correct |
| 48 |
Correct |
648 ms |
67524 KB |
Output is correct |
| 49 |
Correct |
649 ms |
67304 KB |
Output is correct |
| 50 |
Correct |
647 ms |
67540 KB |
Output is correct |
| 51 |
Correct |
644 ms |
67452 KB |
Output is correct |
| 52 |
Correct |
654 ms |
67376 KB |
Output is correct |
| 53 |
Correct |
646 ms |
67480 KB |
Output is correct |
| 54 |
Correct |
641 ms |
67456 KB |
Output is correct |
| 55 |
Correct |
640 ms |
67264 KB |
Output is correct |
