#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
#define rep(a, b) for(int a = 0; a < (b); ++a)
#define st first
#define nd second
#define pb push_back
#define all(a) a.begin(), a.end()
const int LIM=5e3+7, INF=1e9+7;
int T[LIM], mniejsze[LIM], ile[LIM][LIM], ile2[LIM][LIM], dp[LIM][LIM], mi[LIM];
int main() {
ios_base::sync_with_stdio(0); cin.tie(0);
int n;
cin >> n;
rep(i, n) {
cin >> T[i]; --T[i];
}
rep(i, n) {
rep(j, i) ++ile[T[i]][T[j]];
for(int j=i+1; j<n; ++j) ++ile2[T[i]][T[j]];
for(int j=n-2; j>=0; --j) {
ile[T[i]][j]+=ile[T[i]][j+1];
ile2[T[i]][j]+=ile2[T[i]][j+1];
}
for(int j=i; j<n; ++j) if(T[i]>T[j]) ++mniejsze[T[i]];
}
rep(i, n) {
int akt=0;
for(int j=i; j>0; --j) {
akt+=mniejsze[j];
akt-=ile[j][j]-ile[j][i+1];
akt+=ile2[j][j]-ile2[j][i+1];
dp[i][j]=mi[j-1]+akt;
}
akt-=ile[0][0]-ile[0][i+1];
akt+=ile2[0][0]-ile2[0][i+1];
dp[i][0]=akt;
mi[i]=INF;
rep(j, i+1) mi[i]=min(mi[i], dp[i][j]);
}
int ans=INF;
rep(i, n) ans=min(ans, dp[n-1][i]);
cout << ans << '\n';
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
1 ms |
320 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 |
332 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 |
0 ms |
332 KB |
Output is correct |
| 10 |
Correct |
1 ms |
320 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
1 ms |
320 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 |
332 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 |
0 ms |
332 KB |
Output is correct |
| 10 |
Correct |
1 ms |
320 KB |
Output is correct |
| 11 |
Correct |
0 ms |
460 KB |
Output is correct |
| 12 |
Correct |
1 ms |
460 KB |
Output is correct |
| 13 |
Correct |
0 ms |
460 KB |
Output is correct |
| 14 |
Correct |
1 ms |
460 KB |
Output is correct |
| 15 |
Correct |
1 ms |
460 KB |
Output is correct |
| 16 |
Correct |
1 ms |
588 KB |
Output is correct |
| 17 |
Correct |
1 ms |
588 KB |
Output is correct |
| 18 |
Correct |
1 ms |
588 KB |
Output is correct |
| 19 |
Correct |
1 ms |
588 KB |
Output is correct |
| 20 |
Correct |
0 ms |
588 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
1 ms |
320 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 |
332 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 |
0 ms |
332 KB |
Output is correct |
| 10 |
Correct |
1 ms |
320 KB |
Output is correct |
| 11 |
Correct |
0 ms |
460 KB |
Output is correct |
| 12 |
Correct |
1 ms |
460 KB |
Output is correct |
| 13 |
Correct |
0 ms |
460 KB |
Output is correct |
| 14 |
Correct |
1 ms |
460 KB |
Output is correct |
| 15 |
Correct |
1 ms |
460 KB |
Output is correct |
| 16 |
Correct |
1 ms |
588 KB |
Output is correct |
| 17 |
Correct |
1 ms |
588 KB |
Output is correct |
| 18 |
Correct |
1 ms |
588 KB |
Output is correct |
| 19 |
Correct |
1 ms |
588 KB |
Output is correct |
| 20 |
Correct |
0 ms |
588 KB |
Output is correct |
| 21 |
Correct |
2 ms |
3020 KB |
Output is correct |
| 22 |
Correct |
2 ms |
3020 KB |
Output is correct |
| 23 |
Correct |
2 ms |
3020 KB |
Output is correct |
| 24 |
Correct |
2 ms |
3148 KB |
Output is correct |
| 25 |
Correct |
2 ms |
3020 KB |
Output is correct |
| 26 |
Correct |
2 ms |
3020 KB |
Output is correct |
| 27 |
Correct |
2 ms |
3020 KB |
Output is correct |
| 28 |
Correct |
2 ms |
3148 KB |
Output is correct |
| 29 |
Correct |
2 ms |
3020 KB |
Output is correct |
| 30 |
Correct |
2 ms |
3148 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
1 ms |
320 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 |
332 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 |
0 ms |
332 KB |
Output is correct |
| 10 |
Correct |
1 ms |
320 KB |
Output is correct |
| 11 |
Correct |
0 ms |
460 KB |
Output is correct |
| 12 |
Correct |
1 ms |
460 KB |
Output is correct |
| 13 |
Correct |
0 ms |
460 KB |
Output is correct |
| 14 |
Correct |
1 ms |
460 KB |
Output is correct |
| 15 |
Correct |
1 ms |
460 KB |
Output is correct |
| 16 |
Correct |
1 ms |
588 KB |
Output is correct |
| 17 |
Correct |
1 ms |
588 KB |
Output is correct |
| 18 |
Correct |
1 ms |
588 KB |
Output is correct |
| 19 |
Correct |
1 ms |
588 KB |
Output is correct |
| 20 |
Correct |
0 ms |
588 KB |
Output is correct |
| 21 |
Correct |
2 ms |
3020 KB |
Output is correct |
| 22 |
Correct |
2 ms |
3020 KB |
Output is correct |
| 23 |
Correct |
2 ms |
3020 KB |
Output is correct |
| 24 |
Correct |
2 ms |
3148 KB |
Output is correct |
| 25 |
Correct |
2 ms |
3020 KB |
Output is correct |
| 26 |
Correct |
2 ms |
3020 KB |
Output is correct |
| 27 |
Correct |
2 ms |
3020 KB |
Output is correct |
| 28 |
Correct |
2 ms |
3148 KB |
Output is correct |
| 29 |
Correct |
2 ms |
3020 KB |
Output is correct |
| 30 |
Correct |
2 ms |
3148 KB |
Output is correct |
| 31 |
Correct |
15 ms |
16188 KB |
Output is correct |
| 32 |
Correct |
15 ms |
16204 KB |
Output is correct |
| 33 |
Correct |
14 ms |
16180 KB |
Output is correct |
| 34 |
Correct |
15 ms |
16204 KB |
Output is correct |
| 35 |
Correct |
14 ms |
16196 KB |
Output is correct |
| 36 |
Correct |
16 ms |
16292 KB |
Output is correct |
| 37 |
Correct |
15 ms |
16192 KB |
Output is correct |
| 38 |
Correct |
18 ms |
16276 KB |
Output is correct |
| 39 |
Correct |
15 ms |
16196 KB |
Output is correct |
| 40 |
Correct |
15 ms |
16204 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
1 ms |
320 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 |
332 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 |
0 ms |
332 KB |
Output is correct |
| 10 |
Correct |
1 ms |
320 KB |
Output is correct |
| 11 |
Correct |
0 ms |
460 KB |
Output is correct |
| 12 |
Correct |
1 ms |
460 KB |
Output is correct |
| 13 |
Correct |
0 ms |
460 KB |
Output is correct |
| 14 |
Correct |
1 ms |
460 KB |
Output is correct |
| 15 |
Correct |
1 ms |
460 KB |
Output is correct |
| 16 |
Correct |
1 ms |
588 KB |
Output is correct |
| 17 |
Correct |
1 ms |
588 KB |
Output is correct |
| 18 |
Correct |
1 ms |
588 KB |
Output is correct |
| 19 |
Correct |
1 ms |
588 KB |
Output is correct |
| 20 |
Correct |
0 ms |
588 KB |
Output is correct |
| 21 |
Correct |
2 ms |
3020 KB |
Output is correct |
| 22 |
Correct |
2 ms |
3020 KB |
Output is correct |
| 23 |
Correct |
2 ms |
3020 KB |
Output is correct |
| 24 |
Correct |
2 ms |
3148 KB |
Output is correct |
| 25 |
Correct |
2 ms |
3020 KB |
Output is correct |
| 26 |
Correct |
2 ms |
3020 KB |
Output is correct |
| 27 |
Correct |
2 ms |
3020 KB |
Output is correct |
| 28 |
Correct |
2 ms |
3148 KB |
Output is correct |
| 29 |
Correct |
2 ms |
3020 KB |
Output is correct |
| 30 |
Correct |
2 ms |
3148 KB |
Output is correct |
| 31 |
Correct |
15 ms |
16188 KB |
Output is correct |
| 32 |
Correct |
15 ms |
16204 KB |
Output is correct |
| 33 |
Correct |
14 ms |
16180 KB |
Output is correct |
| 34 |
Correct |
15 ms |
16204 KB |
Output is correct |
| 35 |
Correct |
14 ms |
16196 KB |
Output is correct |
| 36 |
Correct |
16 ms |
16292 KB |
Output is correct |
| 37 |
Correct |
15 ms |
16192 KB |
Output is correct |
| 38 |
Correct |
18 ms |
16276 KB |
Output is correct |
| 39 |
Correct |
15 ms |
16196 KB |
Output is correct |
| 40 |
Correct |
15 ms |
16204 KB |
Output is correct |
| 41 |
Correct |
612 ms |
263244 KB |
Output is correct |
| 42 |
Correct |
600 ms |
263348 KB |
Output is correct |
| 43 |
Correct |
594 ms |
263364 KB |
Output is correct |
| 44 |
Correct |
594 ms |
263300 KB |
Output is correct |
| 45 |
Correct |
611 ms |
263372 KB |
Output is correct |
| 46 |
Correct |
604 ms |
263356 KB |
Output is correct |
| 47 |
Correct |
613 ms |
263584 KB |
Output is correct |
| 48 |
Correct |
610 ms |
263380 KB |
Output is correct |
| 49 |
Correct |
629 ms |
263344 KB |
Output is correct |
| 50 |
Correct |
595 ms |
263440 KB |
Output is correct |
| 51 |
Correct |
599 ms |
263364 KB |
Output is correct |
| 52 |
Correct |
613 ms |
263512 KB |
Output is correct |
| 53 |
Correct |
598 ms |
263556 KB |
Output is correct |
| 54 |
Correct |
639 ms |
263380 KB |
Output is correct |
| 55 |
Correct |
602 ms |
263568 KB |
Output is correct |
