# include <bits/stdc++.h>
#define f first
#define s second
#define pb push_back
using namespace std;
const int N = 5005;
int n,a[N],idx[N],dp1[N][N],dp2[N][N],dp[N];
int tree[N];
void update(int idx, int val) {
for (int i = idx; i < N; i+=i&(-i)) {
tree[i] += val;
}
}
int getans(int le, int ri) {
int pas = 0;
for (int i = ri; i > 0; i-=i&(-i)) {
pas += tree[i];
}
for (int i = le - 1; i > 0; i-=i&(-i)){
pas -= tree[i];
}
return pas;
}
main() {
cin>>n;
for (int i = 1; i <= n; i++) {
cin>>a[i];
idx[a[i]] = i;
}
for (int i = 1; i <= n; i++) {
update(idx[i],1);
for (int j = i + 1; j <= n; j++) {
dp1[i][j] = dp1[i][j - 1] + getans(idx[j],n);
}
}
for (int i = 1; i < N; i++) tree[i] = 0;
for (int i = 1; i <= n; i++) {
for (int j = i; j <= n; j++) {
dp2[i][j] = dp2[i][j - 1] + getans(1, idx[j] - 1);
update(idx[j],1);
}
for (int j = i; j <= n; j++) {
update(idx[j], -1);
}
}
dp[0] = 0;
for (int i = 1; i <= n; i++) {
dp[i] = 1e9;
for (int j = i - 1; j >= 0; j--) {
// j ---> 1 + i ---> j + 1
dp[i] = min(dp[i],dp[j] + dp1[j][i] + dp2[j + 1][i]);
}
}
cout<<dp[n]<<endl;
}
Compilation message
Main.cpp:24:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
24 | main() {
| ^~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
308 KB |
Output is correct |
| 2 |
Correct |
1 ms |
304 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 |
300 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 |
428 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
308 KB |
Output is correct |
| 2 |
Correct |
1 ms |
304 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 |
300 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 |
428 KB |
Output is correct |
| 11 |
Correct |
1 ms |
460 KB |
Output is correct |
| 12 |
Correct |
1 ms |
460 KB |
Output is correct |
| 13 |
Correct |
1 ms |
460 KB |
Output is correct |
| 14 |
Correct |
1 ms |
460 KB |
Output is correct |
| 15 |
Correct |
1 ms |
432 KB |
Output is correct |
| 16 |
Correct |
1 ms |
460 KB |
Output is correct |
| 17 |
Correct |
1 ms |
460 KB |
Output is correct |
| 18 |
Correct |
1 ms |
428 KB |
Output is correct |
| 19 |
Correct |
1 ms |
432 KB |
Output is correct |
| 20 |
Correct |
1 ms |
428 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
308 KB |
Output is correct |
| 2 |
Correct |
1 ms |
304 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 |
300 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 |
428 KB |
Output is correct |
| 11 |
Correct |
1 ms |
460 KB |
Output is correct |
| 12 |
Correct |
1 ms |
460 KB |
Output is correct |
| 13 |
Correct |
1 ms |
460 KB |
Output is correct |
| 14 |
Correct |
1 ms |
460 KB |
Output is correct |
| 15 |
Correct |
1 ms |
432 KB |
Output is correct |
| 16 |
Correct |
1 ms |
460 KB |
Output is correct |
| 17 |
Correct |
1 ms |
460 KB |
Output is correct |
| 18 |
Correct |
1 ms |
428 KB |
Output is correct |
| 19 |
Correct |
1 ms |
432 KB |
Output is correct |
| 20 |
Correct |
1 ms |
428 KB |
Output is correct |
| 21 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 22 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 24 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 25 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 26 |
Correct |
3 ms |
2096 KB |
Output is correct |
| 27 |
Correct |
3 ms |
1996 KB |
Output is correct |
| 28 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 29 |
Correct |
3 ms |
1996 KB |
Output is correct |
| 30 |
Correct |
3 ms |
1996 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
308 KB |
Output is correct |
| 2 |
Correct |
1 ms |
304 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 |
300 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 |
428 KB |
Output is correct |
| 11 |
Correct |
1 ms |
460 KB |
Output is correct |
| 12 |
Correct |
1 ms |
460 KB |
Output is correct |
| 13 |
Correct |
1 ms |
460 KB |
Output is correct |
| 14 |
Correct |
1 ms |
460 KB |
Output is correct |
| 15 |
Correct |
1 ms |
432 KB |
Output is correct |
| 16 |
Correct |
1 ms |
460 KB |
Output is correct |
| 17 |
Correct |
1 ms |
460 KB |
Output is correct |
| 18 |
Correct |
1 ms |
428 KB |
Output is correct |
| 19 |
Correct |
1 ms |
432 KB |
Output is correct |
| 20 |
Correct |
1 ms |
428 KB |
Output is correct |
| 21 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 22 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 24 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 25 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 26 |
Correct |
3 ms |
2096 KB |
Output is correct |
| 27 |
Correct |
3 ms |
1996 KB |
Output is correct |
| 28 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 29 |
Correct |
3 ms |
1996 KB |
Output is correct |
| 30 |
Correct |
3 ms |
1996 KB |
Output is correct |
| 31 |
Correct |
23 ms |
9128 KB |
Output is correct |
| 32 |
Correct |
24 ms |
9176 KB |
Output is correct |
| 33 |
Correct |
23 ms |
9264 KB |
Output is correct |
| 34 |
Correct |
22 ms |
9216 KB |
Output is correct |
| 35 |
Correct |
22 ms |
9224 KB |
Output is correct |
| 36 |
Correct |
23 ms |
9180 KB |
Output is correct |
| 37 |
Correct |
23 ms |
9160 KB |
Output is correct |
| 38 |
Correct |
22 ms |
9156 KB |
Output is correct |
| 39 |
Correct |
22 ms |
9292 KB |
Output is correct |
| 40 |
Correct |
22 ms |
9208 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
308 KB |
Output is correct |
| 2 |
Correct |
1 ms |
304 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 |
300 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 |
428 KB |
Output is correct |
| 11 |
Correct |
1 ms |
460 KB |
Output is correct |
| 12 |
Correct |
1 ms |
460 KB |
Output is correct |
| 13 |
Correct |
1 ms |
460 KB |
Output is correct |
| 14 |
Correct |
1 ms |
460 KB |
Output is correct |
| 15 |
Correct |
1 ms |
432 KB |
Output is correct |
| 16 |
Correct |
1 ms |
460 KB |
Output is correct |
| 17 |
Correct |
1 ms |
460 KB |
Output is correct |
| 18 |
Correct |
1 ms |
428 KB |
Output is correct |
| 19 |
Correct |
1 ms |
432 KB |
Output is correct |
| 20 |
Correct |
1 ms |
428 KB |
Output is correct |
| 21 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 22 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 24 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 25 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 26 |
Correct |
3 ms |
2096 KB |
Output is correct |
| 27 |
Correct |
3 ms |
1996 KB |
Output is correct |
| 28 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 29 |
Correct |
3 ms |
1996 KB |
Output is correct |
| 30 |
Correct |
3 ms |
1996 KB |
Output is correct |
| 31 |
Correct |
23 ms |
9128 KB |
Output is correct |
| 32 |
Correct |
24 ms |
9176 KB |
Output is correct |
| 33 |
Correct |
23 ms |
9264 KB |
Output is correct |
| 34 |
Correct |
22 ms |
9216 KB |
Output is correct |
| 35 |
Correct |
22 ms |
9224 KB |
Output is correct |
| 36 |
Correct |
23 ms |
9180 KB |
Output is correct |
| 37 |
Correct |
23 ms |
9160 KB |
Output is correct |
| 38 |
Correct |
22 ms |
9156 KB |
Output is correct |
| 39 |
Correct |
22 ms |
9292 KB |
Output is correct |
| 40 |
Correct |
22 ms |
9208 KB |
Output is correct |
| 41 |
Correct |
876 ms |
134504 KB |
Output is correct |
| 42 |
Correct |
887 ms |
134336 KB |
Output is correct |
| 43 |
Correct |
914 ms |
134396 KB |
Output is correct |
| 44 |
Correct |
897 ms |
134428 KB |
Output is correct |
| 45 |
Correct |
891 ms |
134452 KB |
Output is correct |
| 46 |
Correct |
887 ms |
134412 KB |
Output is correct |
| 47 |
Correct |
883 ms |
134444 KB |
Output is correct |
| 48 |
Correct |
882 ms |
134480 KB |
Output is correct |
| 49 |
Correct |
881 ms |
134496 KB |
Output is correct |
| 50 |
Correct |
880 ms |
134280 KB |
Output is correct |
| 51 |
Correct |
887 ms |
134444 KB |
Output is correct |
| 52 |
Correct |
886 ms |
134476 KB |
Output is correct |
| 53 |
Correct |
904 ms |
134400 KB |
Output is correct |
| 54 |
Correct |
891 ms |
134428 KB |
Output is correct |
| 55 |
Correct |
882 ms |
134320 KB |
Output is correct |
