#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pll pair<ll,ll>
#define pii pair<int,int>
#define fs first
#define sc second
#define tlll tuple<ll,ll,ll>
const int mxn = 5050;
int N;
int arr[mxn],pos[mxn];
int aux[mxn][mxn];
ll bit1[mxn],bit2[mxn];
int dp[mxn];
void modify(ll bit[],int p,int v){
for(;p<mxn;p+=p&-p)bit[p] += v;
return;
}
int getval(ll bit[],int s,int e){
int re = 0;
for(;e>0;e-= e&-e)re += bit[e];
s--;
for(;s>0;s-= s&-s)re -= bit[s];
return re;
}
void calc(){
fill(dp,dp+mxn,mxn*mxn);
dp[0] = 0;
for(int i = 0;i<=N;i++){
memset(bit1,0,sizeof(bit1));
memset(bit2,0,sizeof(bit2));
int sh = 0;
for(int j = 1;j<=N;j++){
if(j>i)modify(bit1,pos[j],1);
}
for(int j = i+1;j<=N;j++){
int tdp = dp[i]+aux[i+1][j];
sh = sh+getval(bit1,0,pos[j]-1)-getval(bit2,pos[j]+1,N);
modify(bit1,pos[j],-1);
modify(bit2,pos[j],1);
dp[j] = min(dp[j],tdp+sh);
//cerr<<i<<' '<<j<<' '<<tdp<<":"<<sh<<endl;
}
}
//for(int i = 1;i<=N;i++)cerr<<dp[i]<<' ';cerr<<endl;
return;
}
int main(){
ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
cin>>N;
for(int i = 1;i<=N;i++)cin>>arr[i],pos[arr[i]] = i;
for(int s = 1;s<=N;s++){
memset(bit1,0,sizeof(bit1));
for(int e = s;e<=N;e++){
aux[s][e] = aux[s][e-1];
aux[s][e] += getval(bit1,0,pos[e]);
modify(bit1,pos[e],1);
}
}
calc();
cout<<dp[N];
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
604 KB |
Output is correct |
| 5 |
Correct |
0 ms |
604 KB |
Output is correct |
| 6 |
Correct |
1 ms |
604 KB |
Output is correct |
| 7 |
Correct |
0 ms |
604 KB |
Output is correct |
| 8 |
Correct |
0 ms |
604 KB |
Output is correct |
| 9 |
Correct |
0 ms |
604 KB |
Output is correct |
| 10 |
Correct |
1 ms |
604 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
604 KB |
Output is correct |
| 5 |
Correct |
0 ms |
604 KB |
Output is correct |
| 6 |
Correct |
1 ms |
604 KB |
Output is correct |
| 7 |
Correct |
0 ms |
604 KB |
Output is correct |
| 8 |
Correct |
0 ms |
604 KB |
Output is correct |
| 9 |
Correct |
0 ms |
604 KB |
Output is correct |
| 10 |
Correct |
1 ms |
604 KB |
Output is correct |
| 11 |
Correct |
1 ms |
604 KB |
Output is correct |
| 12 |
Correct |
1 ms |
604 KB |
Output is correct |
| 13 |
Correct |
1 ms |
604 KB |
Output is correct |
| 14 |
Correct |
1 ms |
604 KB |
Output is correct |
| 15 |
Correct |
1 ms |
604 KB |
Output is correct |
| 16 |
Correct |
1 ms |
604 KB |
Output is correct |
| 17 |
Correct |
1 ms |
604 KB |
Output is correct |
| 18 |
Correct |
1 ms |
604 KB |
Output is correct |
| 19 |
Correct |
1 ms |
604 KB |
Output is correct |
| 20 |
Correct |
0 ms |
604 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
604 KB |
Output is correct |
| 5 |
Correct |
0 ms |
604 KB |
Output is correct |
| 6 |
Correct |
1 ms |
604 KB |
Output is correct |
| 7 |
Correct |
0 ms |
604 KB |
Output is correct |
| 8 |
Correct |
0 ms |
604 KB |
Output is correct |
| 9 |
Correct |
0 ms |
604 KB |
Output is correct |
| 10 |
Correct |
1 ms |
604 KB |
Output is correct |
| 11 |
Correct |
1 ms |
604 KB |
Output is correct |
| 12 |
Correct |
1 ms |
604 KB |
Output is correct |
| 13 |
Correct |
1 ms |
604 KB |
Output is correct |
| 14 |
Correct |
1 ms |
604 KB |
Output is correct |
| 15 |
Correct |
1 ms |
604 KB |
Output is correct |
| 16 |
Correct |
1 ms |
604 KB |
Output is correct |
| 17 |
Correct |
1 ms |
604 KB |
Output is correct |
| 18 |
Correct |
1 ms |
604 KB |
Output is correct |
| 19 |
Correct |
1 ms |
604 KB |
Output is correct |
| 20 |
Correct |
0 ms |
604 KB |
Output is correct |
| 21 |
Correct |
2 ms |
1368 KB |
Output is correct |
| 22 |
Correct |
2 ms |
1372 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1340 KB |
Output is correct |
| 24 |
Correct |
3 ms |
1528 KB |
Output is correct |
| 25 |
Correct |
2 ms |
1372 KB |
Output is correct |
| 26 |
Correct |
2 ms |
1372 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1372 KB |
Output is correct |
| 28 |
Correct |
2 ms |
1372 KB |
Output is correct |
| 29 |
Correct |
2 ms |
1372 KB |
Output is correct |
| 30 |
Correct |
2 ms |
1372 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
604 KB |
Output is correct |
| 5 |
Correct |
0 ms |
604 KB |
Output is correct |
| 6 |
Correct |
1 ms |
604 KB |
Output is correct |
| 7 |
Correct |
0 ms |
604 KB |
Output is correct |
| 8 |
Correct |
0 ms |
604 KB |
Output is correct |
| 9 |
Correct |
0 ms |
604 KB |
Output is correct |
| 10 |
Correct |
1 ms |
604 KB |
Output is correct |
| 11 |
Correct |
1 ms |
604 KB |
Output is correct |
| 12 |
Correct |
1 ms |
604 KB |
Output is correct |
| 13 |
Correct |
1 ms |
604 KB |
Output is correct |
| 14 |
Correct |
1 ms |
604 KB |
Output is correct |
| 15 |
Correct |
1 ms |
604 KB |
Output is correct |
| 16 |
Correct |
1 ms |
604 KB |
Output is correct |
| 17 |
Correct |
1 ms |
604 KB |
Output is correct |
| 18 |
Correct |
1 ms |
604 KB |
Output is correct |
| 19 |
Correct |
1 ms |
604 KB |
Output is correct |
| 20 |
Correct |
0 ms |
604 KB |
Output is correct |
| 21 |
Correct |
2 ms |
1368 KB |
Output is correct |
| 22 |
Correct |
2 ms |
1372 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1340 KB |
Output is correct |
| 24 |
Correct |
3 ms |
1528 KB |
Output is correct |
| 25 |
Correct |
2 ms |
1372 KB |
Output is correct |
| 26 |
Correct |
2 ms |
1372 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1372 KB |
Output is correct |
| 28 |
Correct |
2 ms |
1372 KB |
Output is correct |
| 29 |
Correct |
2 ms |
1372 KB |
Output is correct |
| 30 |
Correct |
2 ms |
1372 KB |
Output is correct |
| 31 |
Correct |
24 ms |
6236 KB |
Output is correct |
| 32 |
Correct |
24 ms |
6436 KB |
Output is correct |
| 33 |
Correct |
21 ms |
6232 KB |
Output is correct |
| 34 |
Correct |
17 ms |
6236 KB |
Output is correct |
| 35 |
Correct |
17 ms |
6236 KB |
Output is correct |
| 36 |
Correct |
17 ms |
6232 KB |
Output is correct |
| 37 |
Correct |
18 ms |
6236 KB |
Output is correct |
| 38 |
Correct |
18 ms |
6444 KB |
Output is correct |
| 39 |
Correct |
18 ms |
6452 KB |
Output is correct |
| 40 |
Correct |
17 ms |
6236 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
604 KB |
Output is correct |
| 5 |
Correct |
0 ms |
604 KB |
Output is correct |
| 6 |
Correct |
1 ms |
604 KB |
Output is correct |
| 7 |
Correct |
0 ms |
604 KB |
Output is correct |
| 8 |
Correct |
0 ms |
604 KB |
Output is correct |
| 9 |
Correct |
0 ms |
604 KB |
Output is correct |
| 10 |
Correct |
1 ms |
604 KB |
Output is correct |
| 11 |
Correct |
1 ms |
604 KB |
Output is correct |
| 12 |
Correct |
1 ms |
604 KB |
Output is correct |
| 13 |
Correct |
1 ms |
604 KB |
Output is correct |
| 14 |
Correct |
1 ms |
604 KB |
Output is correct |
| 15 |
Correct |
1 ms |
604 KB |
Output is correct |
| 16 |
Correct |
1 ms |
604 KB |
Output is correct |
| 17 |
Correct |
1 ms |
604 KB |
Output is correct |
| 18 |
Correct |
1 ms |
604 KB |
Output is correct |
| 19 |
Correct |
1 ms |
604 KB |
Output is correct |
| 20 |
Correct |
0 ms |
604 KB |
Output is correct |
| 21 |
Correct |
2 ms |
1368 KB |
Output is correct |
| 22 |
Correct |
2 ms |
1372 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1340 KB |
Output is correct |
| 24 |
Correct |
3 ms |
1528 KB |
Output is correct |
| 25 |
Correct |
2 ms |
1372 KB |
Output is correct |
| 26 |
Correct |
2 ms |
1372 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1372 KB |
Output is correct |
| 28 |
Correct |
2 ms |
1372 KB |
Output is correct |
| 29 |
Correct |
2 ms |
1372 KB |
Output is correct |
| 30 |
Correct |
2 ms |
1372 KB |
Output is correct |
| 31 |
Correct |
24 ms |
6236 KB |
Output is correct |
| 32 |
Correct |
24 ms |
6436 KB |
Output is correct |
| 33 |
Correct |
21 ms |
6232 KB |
Output is correct |
| 34 |
Correct |
17 ms |
6236 KB |
Output is correct |
| 35 |
Correct |
17 ms |
6236 KB |
Output is correct |
| 36 |
Correct |
17 ms |
6232 KB |
Output is correct |
| 37 |
Correct |
18 ms |
6236 KB |
Output is correct |
| 38 |
Correct |
18 ms |
6444 KB |
Output is correct |
| 39 |
Correct |
18 ms |
6452 KB |
Output is correct |
| 40 |
Correct |
17 ms |
6236 KB |
Output is correct |
| 41 |
Correct |
872 ms |
77712 KB |
Output is correct |
| 42 |
Correct |
862 ms |
77696 KB |
Output is correct |
| 43 |
Correct |
894 ms |
77180 KB |
Output is correct |
| 44 |
Correct |
872 ms |
77672 KB |
Output is correct |
| 45 |
Correct |
871 ms |
76932 KB |
Output is correct |
| 46 |
Correct |
881 ms |
77684 KB |
Output is correct |
| 47 |
Correct |
860 ms |
77688 KB |
Output is correct |
| 48 |
Correct |
855 ms |
77752 KB |
Output is correct |
| 49 |
Correct |
865 ms |
77748 KB |
Output is correct |
| 50 |
Correct |
847 ms |
77652 KB |
Output is correct |
| 51 |
Correct |
835 ms |
77652 KB |
Output is correct |
| 52 |
Correct |
833 ms |
77748 KB |
Output is correct |
| 53 |
Correct |
844 ms |
77752 KB |
Output is correct |
| 54 |
Correct |
843 ms |
77748 KB |
Output is correct |
| 55 |
Correct |
838 ms |
77752 KB |
Output is correct |
