#include <bits/stdc++.h>
#define int long long
using namespace std;
struct Fenwick
{
int N;
vector<int> BIT;
Fenwick(int n) : N(n+1), BIT(N) {}
void update(int iPos, int delta)
{
for (iPos++; iPos < N; iPos += iPos & -iPos)
BIT[iPos] += delta;
}
int sum(int r) // sum < r
{
int sol(0);
for (; r; r -= r & -r)
sol += BIT[r];
return sol;
}
int sum(int l, int r) // l <= i < r
{
return sum(r) - sum(l);
}
};
signed main(void)
{
ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
int nbElem;
cin >> nbElem;
vector<int> hauteurs(nbElem);
vector<int> positions(nbElem);
for (int iPos = 0; iPos < nbElem; ++iPos)
{
cin >> hauteurs[iPos];
--hauteurs[iPos];
positions[hauteurs[iPos]] = iPos;
}
Fenwick fen(nbElem+1);
Fenwick fen2(nbElem+1);
for (int iPos = 0; iPos < nbElem; ++iPos)
fen.update(iPos, 1);
vector<int> dp(nbElem+1, 1e18);
dp[0] = 0;
for (int dejaPlace(0); dejaPlace < nbElem; ++dejaPlace)
{
int coutPlacement = dp[dejaPlace];
for (int placeApres(1); placeApres + dejaPlace <= nbElem; ++placeApres)
{
int iPos = placeApres + dejaPlace - 1;
coutPlacement += fen.sum(positions[iPos]);
coutPlacement -= fen2.sum(positions[iPos]+1, nbElem);
fen2.update(positions[iPos], 1);
/*for (int iPos = dejaPlace + placeApres-1; iPos >= dejaPlace; --iPos)
{
coutPlacement += fen.sum(positions[iPos]);
fen.update(positions[iPos], -1);
}
for (int j(0); j < positions[iPos]; ++j)
if (hauteurs[j] >= dejaPlace and (hauteurs[j] >= dejaPlace + placeApres or hauteurs[j] < iPos))
++coutPlacement;*/
dp[dejaPlace+placeApres] = min(dp[dejaPlace+placeApres], coutPlacement);
}
for (int placeApres(1); placeApres + dejaPlace <= nbElem; ++placeApres)
fen2.update(positions[placeApres+dejaPlace-1], -1);
fen.update(positions[dejaPlace], -1);
}
cout << dp[nbElem] << endl;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Correct |
0 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
0 ms |
364 KB |
Output is correct |
| 6 |
Correct |
0 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
0 ms |
364 KB |
Output is correct |
| 9 |
Correct |
1 ms |
364 KB |
Output is correct |
| 10 |
Correct |
1 ms |
364 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Correct |
0 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
0 ms |
364 KB |
Output is correct |
| 6 |
Correct |
0 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
0 ms |
364 KB |
Output is correct |
| 9 |
Correct |
1 ms |
364 KB |
Output is correct |
| 10 |
Correct |
1 ms |
364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
364 KB |
Output is correct |
| 12 |
Correct |
1 ms |
512 KB |
Output is correct |
| 13 |
Correct |
1 ms |
364 KB |
Output is correct |
| 14 |
Correct |
1 ms |
376 KB |
Output is correct |
| 15 |
Correct |
1 ms |
364 KB |
Output is correct |
| 16 |
Correct |
1 ms |
364 KB |
Output is correct |
| 17 |
Correct |
1 ms |
364 KB |
Output is correct |
| 18 |
Correct |
1 ms |
364 KB |
Output is correct |
| 19 |
Correct |
1 ms |
364 KB |
Output is correct |
| 20 |
Correct |
1 ms |
364 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Correct |
0 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
0 ms |
364 KB |
Output is correct |
| 6 |
Correct |
0 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
0 ms |
364 KB |
Output is correct |
| 9 |
Correct |
1 ms |
364 KB |
Output is correct |
| 10 |
Correct |
1 ms |
364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
364 KB |
Output is correct |
| 12 |
Correct |
1 ms |
512 KB |
Output is correct |
| 13 |
Correct |
1 ms |
364 KB |
Output is correct |
| 14 |
Correct |
1 ms |
376 KB |
Output is correct |
| 15 |
Correct |
1 ms |
364 KB |
Output is correct |
| 16 |
Correct |
1 ms |
364 KB |
Output is correct |
| 17 |
Correct |
1 ms |
364 KB |
Output is correct |
| 18 |
Correct |
1 ms |
364 KB |
Output is correct |
| 19 |
Correct |
1 ms |
364 KB |
Output is correct |
| 20 |
Correct |
1 ms |
364 KB |
Output is correct |
| 21 |
Correct |
1 ms |
508 KB |
Output is correct |
| 22 |
Correct |
1 ms |
512 KB |
Output is correct |
| 23 |
Correct |
1 ms |
364 KB |
Output is correct |
| 24 |
Correct |
1 ms |
364 KB |
Output is correct |
| 25 |
Correct |
1 ms |
364 KB |
Output is correct |
| 26 |
Correct |
1 ms |
364 KB |
Output is correct |
| 27 |
Correct |
1 ms |
364 KB |
Output is correct |
| 28 |
Correct |
1 ms |
364 KB |
Output is correct |
| 29 |
Correct |
1 ms |
364 KB |
Output is correct |
| 30 |
Correct |
1 ms |
364 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Correct |
0 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
0 ms |
364 KB |
Output is correct |
| 6 |
Correct |
0 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
0 ms |
364 KB |
Output is correct |
| 9 |
Correct |
1 ms |
364 KB |
Output is correct |
| 10 |
Correct |
1 ms |
364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
364 KB |
Output is correct |
| 12 |
Correct |
1 ms |
512 KB |
Output is correct |
| 13 |
Correct |
1 ms |
364 KB |
Output is correct |
| 14 |
Correct |
1 ms |
376 KB |
Output is correct |
| 15 |
Correct |
1 ms |
364 KB |
Output is correct |
| 16 |
Correct |
1 ms |
364 KB |
Output is correct |
| 17 |
Correct |
1 ms |
364 KB |
Output is correct |
| 18 |
Correct |
1 ms |
364 KB |
Output is correct |
| 19 |
Correct |
1 ms |
364 KB |
Output is correct |
| 20 |
Correct |
1 ms |
364 KB |
Output is correct |
| 21 |
Correct |
1 ms |
508 KB |
Output is correct |
| 22 |
Correct |
1 ms |
512 KB |
Output is correct |
| 23 |
Correct |
1 ms |
364 KB |
Output is correct |
| 24 |
Correct |
1 ms |
364 KB |
Output is correct |
| 25 |
Correct |
1 ms |
364 KB |
Output is correct |
| 26 |
Correct |
1 ms |
364 KB |
Output is correct |
| 27 |
Correct |
1 ms |
364 KB |
Output is correct |
| 28 |
Correct |
1 ms |
364 KB |
Output is correct |
| 29 |
Correct |
1 ms |
364 KB |
Output is correct |
| 30 |
Correct |
1 ms |
364 KB |
Output is correct |
| 31 |
Correct |
14 ms |
364 KB |
Output is correct |
| 32 |
Correct |
15 ms |
364 KB |
Output is correct |
| 33 |
Correct |
15 ms |
512 KB |
Output is correct |
| 34 |
Correct |
14 ms |
492 KB |
Output is correct |
| 35 |
Correct |
15 ms |
364 KB |
Output is correct |
| 36 |
Correct |
13 ms |
364 KB |
Output is correct |
| 37 |
Correct |
13 ms |
364 KB |
Output is correct |
| 38 |
Correct |
15 ms |
512 KB |
Output is correct |
| 39 |
Correct |
16 ms |
364 KB |
Output is correct |
| 40 |
Correct |
13 ms |
364 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Correct |
0 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
0 ms |
364 KB |
Output is correct |
| 6 |
Correct |
0 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
0 ms |
364 KB |
Output is correct |
| 9 |
Correct |
1 ms |
364 KB |
Output is correct |
| 10 |
Correct |
1 ms |
364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
364 KB |
Output is correct |
| 12 |
Correct |
1 ms |
512 KB |
Output is correct |
| 13 |
Correct |
1 ms |
364 KB |
Output is correct |
| 14 |
Correct |
1 ms |
376 KB |
Output is correct |
| 15 |
Correct |
1 ms |
364 KB |
Output is correct |
| 16 |
Correct |
1 ms |
364 KB |
Output is correct |
| 17 |
Correct |
1 ms |
364 KB |
Output is correct |
| 18 |
Correct |
1 ms |
364 KB |
Output is correct |
| 19 |
Correct |
1 ms |
364 KB |
Output is correct |
| 20 |
Correct |
1 ms |
364 KB |
Output is correct |
| 21 |
Correct |
1 ms |
508 KB |
Output is correct |
| 22 |
Correct |
1 ms |
512 KB |
Output is correct |
| 23 |
Correct |
1 ms |
364 KB |
Output is correct |
| 24 |
Correct |
1 ms |
364 KB |
Output is correct |
| 25 |
Correct |
1 ms |
364 KB |
Output is correct |
| 26 |
Correct |
1 ms |
364 KB |
Output is correct |
| 27 |
Correct |
1 ms |
364 KB |
Output is correct |
| 28 |
Correct |
1 ms |
364 KB |
Output is correct |
| 29 |
Correct |
1 ms |
364 KB |
Output is correct |
| 30 |
Correct |
1 ms |
364 KB |
Output is correct |
| 31 |
Correct |
14 ms |
364 KB |
Output is correct |
| 32 |
Correct |
15 ms |
364 KB |
Output is correct |
| 33 |
Correct |
15 ms |
512 KB |
Output is correct |
| 34 |
Correct |
14 ms |
492 KB |
Output is correct |
| 35 |
Correct |
15 ms |
364 KB |
Output is correct |
| 36 |
Correct |
13 ms |
364 KB |
Output is correct |
| 37 |
Correct |
13 ms |
364 KB |
Output is correct |
| 38 |
Correct |
15 ms |
512 KB |
Output is correct |
| 39 |
Correct |
16 ms |
364 KB |
Output is correct |
| 40 |
Correct |
13 ms |
364 KB |
Output is correct |
| 41 |
Correct |
774 ms |
620 KB |
Output is correct |
| 42 |
Correct |
793 ms |
492 KB |
Output is correct |
| 43 |
Correct |
789 ms |
620 KB |
Output is correct |
| 44 |
Correct |
798 ms |
492 KB |
Output is correct |
| 45 |
Correct |
792 ms |
616 KB |
Output is correct |
| 46 |
Correct |
758 ms |
620 KB |
Output is correct |
| 47 |
Correct |
809 ms |
620 KB |
Output is correct |
| 48 |
Correct |
765 ms |
616 KB |
Output is correct |
| 49 |
Correct |
768 ms |
492 KB |
Output is correct |
| 50 |
Correct |
764 ms |
620 KB |
Output is correct |
| 51 |
Correct |
798 ms |
756 KB |
Output is correct |
| 52 |
Correct |
793 ms |
492 KB |
Output is correct |
| 53 |
Correct |
771 ms |
620 KB |
Output is correct |
| 54 |
Correct |
780 ms |
620 KB |
Output is correct |
| 55 |
Correct |
766 ms |
616 KB |
Output is correct |
