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Cod sursa(job #898909)
#include <fstream>
#include <algorithm>
#define maxn 1100
using namespace std;
int dp[maxn][maxn];
int a[maxn],b[maxn];
int sol[maxn];
int n,m;
ifstream in("cmlsc.in");
ofstream out("cmlsc.out");
void read()
{
in>>n>>m;
for(int i=1;i<=n;i++)
in>>a[i];
for(int i=1;i<=m;i++)
in>>b[i];
}
void dinamica()
{
for(int i=1;i<=n;i++)
for(int j=1;j<=m;j++)
{
if(a[i]==b[j])
dp[i][j]=dp[i-1][j-1]+1;
else dp[i][j]=max(dp[i-1][j],dp[i][j-1]);
}
}
void rec()
{
for(int i=n,j=m;i;)
{
if(a[i]==b[j]) sol[++sol[0]]=a[i],i--,j--;
else if(dp[i][j-1]>dp[i-1][j]) j--;
else i--;
}
}
int main()
{
read();
dinamica();
rec();
out<<dp[n][m]<<"\n";
for(int i=dp[n][m];i>0;i--) out<<sol[i]<<" ";
return 0;
}