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Cod sursa(job #486204)
#include <fstream>
using namespace std;
ifstream fin ("cmlsc.in");
ofstream fout("cmlsc.out");
int a[1030],b[1030],mat[1030][1030],d[1030],n,m,l,max1;
void citire() {
fin>>n>>m;
for(int i=1;i<=n;i++)
fin>>a[i];
for(int j=1;j<=m;j++)
fin>>b[j];
fin.close();
}
void ask() {
for(int i=1;i<=n;i++)
for(int j=1;j<=m;j++)
if(a[i]==b[j])
mat[i][j]=mat[i-1][j-1]+1;
else
mat[i][j]=max(mat[i][j-1],mat[i-1][j]);
max1=mat[n][m];
int i=n,j=m;
while(i && j) {
if(a[i]==b[j]) {
d[l++]=a[i];
i--,j--;
}
else
if(mat[i][j-1]>mat[i-1][j])
j--;
else
i--;
}
}
void afis() {
fout<<max1<<"\n";
for(int i=l-1;i>=0;i--)
fout<<d[i]<<" ";
fout.close();
}
int main()
{
citire();
ask();
afis();
return 0;
}