fork download
copy 
  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. #define ll long long
  4. const int N=500;
  5. ll a[N],b[N],n,m;
  6. void input()
  7. {
  8.     cin>>n>>m;
  9.     for(int i=1;i<=n;i++)cin>>a[i];
  10.     for(int i=1;i<=m;i++)cin>>b[i];
  11. }
  12. ll len[N][N];
  13. void Dp()
  14. {
  15.     for(int i=1;i<=n;i++)len[i][0]=0;
  16.     for(int i=1;i<=m;i++)len[0][i]=0;
  17.     for(int i=1;i<=n;i++)
  18.      for(int j=1;j<=m;j++)
  19.      {
  20.          if(a[i]==b[j])len[i][j]=len[i-1][j-1]+1;
  21.          else len[i][j]=max(len[i-1][j],len[i][j-1]);
  22.      }
  23.     cout<<len[n][m]<<"\n";
  24. }
  25. void Trace()
  26. {
  27.     ll i=n,j=m;
  28.     vector<ll> ans;
  29.     while(i>0&&j>0)
  30.     {
  31.         if(a[i]==b[j])
  32.         {
  33.             ans.push_back(a[i]);
  34.             i--;
  35.             j--;
  36.         }
  37.         else if(len[i][j]==len[i][j-1])j--;
  38.         else i--;
  39.     }
  40.     for(int i=ans.size()-1;i>=0;i--)cout<<ans[i]<<" ";
  41. }
  42. int main()
  43. {
  44.     ios_base::sync_with_stdio(0);
  45.     cin.tie(0);
  46.     cout.tie(0);
  47.     input();
  48.     Dp();
  49.     Trace();
  50.     return 0;
  51. }
Success #stdin #stdout 0.01s 5408KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
0
https://ideone.com/CcsEcj
language:
C++14 (gcc 8.3)
created:
1 year ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!