#include "bits/stdc++.h"
#define MAXN 100009
#define INF 1000000007
#define mp(x,y) make_pair(x,y)
#define all(v) v.begin(),v.end()
#define pb(x) push_back(x)
#define wr cout<<"----------------"<<endl;
#define ppb() pop_back()
#define tr(ii,c) for(__typeof((c).begin()) ii=(c).begin();ii!=(c).end();ii++)
#define ff first
#define ss second
#define my_little_dodge 46
#define debug(x) cerr<< #x <<" = "<< x<<endl;
using namespace std;
typedef long long ll;
typedef pair<int,int> PII;
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
const int N=802;
int n,arr[N],inv[N][N],dp[N][N],odp[N][N];
int F[N][N],AB[N][N],BA[N][N],par[N][N];
int g(int x,int y){
if(x>=y)return 0;
if(~odp[x][y])return odp[x][y];
return odp[x][y] = g(x,y-1) + par[y][y] - par[x-1][y];
}
int cost(int a,int b,int c){
return g(a+1,b-1)+F[a][b-1]+(BA[b][b-1]-BA[b][a])+AB[c][b];
}
int rec(int a,int b){
if(b==n)return cost(a,b,0);
int &ret=dp[a][b];
if(~ret)return ret;
ret=INF;
for(int i=b+1;i<=n;i++)
umin(ret,rec(b,i)+cost(a,b,i));
return ret;
}
int main(){
//freopen("file.in", "r", stdin);
memset(dp,-1,sizeof dp);
memset(odp,-1,sizeof odp);
scanf("%d",&n);
for(int i=1;i<=n;i++)scanf("%d",arr+i);
for(int i=2;i<=n;i++)
for(int j=1;j<i;j++)
inv[arr[i]][arr[j]]++;
for(int i=1;i<=n;i++)
for(int j=1;j<=n;j++)
par[i][j]=par[i-1][j]+inv[j][i];
for(int y=1;y<=n;y++)
for(int z=y+1;z<=n;z++){
F[y][z]=F[y][z-1];
for(int x=1;x<=y;x++)
F[y][z]+=inv[x][z];
}
for(int i=1;i<=n;i++)
for(int j=1;j<=n;j++){
BA[i][j]=BA[i][j-1]+inv[i][j];
AB[i][j]=AB[i][j-1]+inv[j][i];
}
int ans=INF;
for(int i=1;i<=n;i++)
umin(ans,rec(0,i));
printf("%d\n",ans);
return 0;
}
Compilation message
Main.cpp: In function 'int main()':
Main.cpp:44:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
44 | scanf("%d",&n);
| ~~~~~^~~~~~~~~
Main.cpp:45:28: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
45 | for(int i=1;i<=n;i++)scanf("%d",arr+i);
| ~~~~~^~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
5324 KB |
Output is correct |
| 2 |
Correct |
3 ms |
5324 KB |
Output is correct |
| 3 |
Correct |
3 ms |
5324 KB |
Output is correct |
| 4 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 5 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 6 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 7 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 8 |
Correct |
4 ms |
5452 KB |
Output is correct |
| 9 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 10 |
Correct |
3 ms |
5452 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
5324 KB |
Output is correct |
| 2 |
Correct |
3 ms |
5324 KB |
Output is correct |
| 3 |
Correct |
3 ms |
5324 KB |
Output is correct |
| 4 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 5 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 6 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 7 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 8 |
Correct |
4 ms |
5452 KB |
Output is correct |
| 9 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 10 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 11 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 12 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 13 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 14 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 15 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 16 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 17 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 18 |
Correct |
4 ms |
5580 KB |
Output is correct |
| 19 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 20 |
Correct |
3 ms |
5580 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
5324 KB |
Output is correct |
| 2 |
Correct |
3 ms |
5324 KB |
Output is correct |
| 3 |
Correct |
3 ms |
5324 KB |
Output is correct |
| 4 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 5 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 6 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 7 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 8 |
Correct |
4 ms |
5452 KB |
Output is correct |
| 9 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 10 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 11 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 12 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 13 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 14 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 15 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 16 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 17 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 18 |
Correct |
4 ms |
5580 KB |
Output is correct |
| 19 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 20 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 21 |
Correct |
20 ms |
8472 KB |
Output is correct |
| 22 |
Correct |
19 ms |
8496 KB |
Output is correct |
| 23 |
Correct |
19 ms |
8492 KB |
Output is correct |
| 24 |
Correct |
20 ms |
8396 KB |
Output is correct |
| 25 |
Correct |
19 ms |
8396 KB |
Output is correct |
| 26 |
Correct |
19 ms |
8396 KB |
Output is correct |
| 27 |
Correct |
20 ms |
8504 KB |
Output is correct |
| 28 |
Correct |
23 ms |
8524 KB |
Output is correct |
| 29 |
Correct |
24 ms |
8488 KB |
Output is correct |
| 30 |
Correct |
20 ms |
8508 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
5324 KB |
Output is correct |
| 2 |
Correct |
3 ms |
5324 KB |
Output is correct |
| 3 |
Correct |
3 ms |
5324 KB |
Output is correct |
| 4 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 5 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 6 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 7 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 8 |
Correct |
4 ms |
5452 KB |
Output is correct |
| 9 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 10 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 11 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 12 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 13 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 14 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 15 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 16 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 17 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 18 |
Correct |
4 ms |
5580 KB |
Output is correct |
| 19 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 20 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 21 |
Correct |
20 ms |
8472 KB |
Output is correct |
| 22 |
Correct |
19 ms |
8496 KB |
Output is correct |
| 23 |
Correct |
19 ms |
8492 KB |
Output is correct |
| 24 |
Correct |
20 ms |
8396 KB |
Output is correct |
| 25 |
Correct |
19 ms |
8396 KB |
Output is correct |
| 26 |
Correct |
19 ms |
8396 KB |
Output is correct |
| 27 |
Correct |
20 ms |
8504 KB |
Output is correct |
| 28 |
Correct |
23 ms |
8524 KB |
Output is correct |
| 29 |
Correct |
24 ms |
8488 KB |
Output is correct |
| 30 |
Correct |
20 ms |
8508 KB |
Output is correct |
| 31 |
Correct |
979 ms |
17916 KB |
Output is correct |
| 32 |
Correct |
973 ms |
17932 KB |
Output is correct |
| 33 |
Correct |
981 ms |
18048 KB |
Output is correct |
| 34 |
Correct |
953 ms |
17988 KB |
Output is correct |
| 35 |
Correct |
965 ms |
17992 KB |
Output is correct |
| 36 |
Correct |
938 ms |
17944 KB |
Output is correct |
| 37 |
Correct |
947 ms |
17988 KB |
Output is correct |
| 38 |
Correct |
977 ms |
17988 KB |
Output is correct |
| 39 |
Correct |
930 ms |
17948 KB |
Output is correct |
| 40 |
Correct |
978 ms |
17948 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
5324 KB |
Output is correct |
| 2 |
Correct |
3 ms |
5324 KB |
Output is correct |
| 3 |
Correct |
3 ms |
5324 KB |
Output is correct |
| 4 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 5 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 6 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 7 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 8 |
Correct |
4 ms |
5452 KB |
Output is correct |
| 9 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 10 |
Correct |
3 ms |
5452 KB |
Output is correct |
| 11 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 12 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 13 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 14 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 15 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 16 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 17 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 18 |
Correct |
4 ms |
5580 KB |
Output is correct |
| 19 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 20 |
Correct |
3 ms |
5580 KB |
Output is correct |
| 21 |
Correct |
20 ms |
8472 KB |
Output is correct |
| 22 |
Correct |
19 ms |
8496 KB |
Output is correct |
| 23 |
Correct |
19 ms |
8492 KB |
Output is correct |
| 24 |
Correct |
20 ms |
8396 KB |
Output is correct |
| 25 |
Correct |
19 ms |
8396 KB |
Output is correct |
| 26 |
Correct |
19 ms |
8396 KB |
Output is correct |
| 27 |
Correct |
20 ms |
8504 KB |
Output is correct |
| 28 |
Correct |
23 ms |
8524 KB |
Output is correct |
| 29 |
Correct |
24 ms |
8488 KB |
Output is correct |
| 30 |
Correct |
20 ms |
8508 KB |
Output is correct |
| 31 |
Correct |
979 ms |
17916 KB |
Output is correct |
| 32 |
Correct |
973 ms |
17932 KB |
Output is correct |
| 33 |
Correct |
981 ms |
18048 KB |
Output is correct |
| 34 |
Correct |
953 ms |
17988 KB |
Output is correct |
| 35 |
Correct |
965 ms |
17992 KB |
Output is correct |
| 36 |
Correct |
938 ms |
17944 KB |
Output is correct |
| 37 |
Correct |
947 ms |
17988 KB |
Output is correct |
| 38 |
Correct |
977 ms |
17988 KB |
Output is correct |
| 39 |
Correct |
930 ms |
17948 KB |
Output is correct |
| 40 |
Correct |
978 ms |
17948 KB |
Output is correct |
| 41 |
Runtime error |
11 ms |
10572 KB |
Execution killed with signal 11 |
| 42 |
Halted |
0 ms |
0 KB |
- |
