[BNDSOJ] small number of columns of the code P

Thanks to the help of big brother Orz gjznb

 1 #include<bits/stdc++.h>
 2 using namespace std;
 3 const int N=160;
 4 vector<int> dp[N][N];
 5 bool book[8];
 6 int a[N];
 7 int n;
 8 int main()
 9 {
10     cin>>n;
11     for(int i=1;i<=n;i++)
12     {
13         cin>>a[i];
14         dp[i][i].push_back(a[i]);
15     }
16     for(int l=1;l<=n;l++)
17     {
18         for(int i=1;i<=n-l;i++)
19         {
20             int j=i+l;
21             memset(book,0,sizeof(book));
22             for(int k=i;k<j;k++)
23             {
24                 for(int ii=0;ii<dp[i][j].size();ii++)
25                 {
26                     book[dp[i][j][ii]]++;
27                 }
28                 for(int ii=0;ii<dp[i][k].size();ii++)
29                 {
30                     for(int jj=0;jj<dp[k+1][j].size();jj++)
31                     {
32                         int to=(dp[i][k][ii]+dp[k+1][j][jj])/2;
33                         if(book[to]==0)
34                         {
35                             dp[i][j].push_back(to);
36                             book[to]=1;
37                         }
38                     }
39                 }
40             }
41         }
42     }
43     for(int i=0;i<8;i++)
44     {
45         if(book[i]) cout<<i<<" ";
46     }
47     return 0;
48 }