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Cod sursa(job #702005)
#include<fstream>
#define nmax 1025
using namespace std;
ifstream fin("cmlsc.in");ofstream fout("cmlsc.out");
int n,m,a[nmax],b[nmax],s[nmax];
void citire()
{
fin>>m>>n;int i;for(i=1;i<=m;i++) fin>>a[i]; for(i=1;i<=n;i++) fin>>b[i];
}
void subsir()
{
int i,j,x=1,k=1;
for(i=1;i<=m;i++)
{
j=x;
while(j<=n)
{
if(a[i]==b[j])
{x=j;s[k]=a[i];k++;}
j++;
}
}
fout<<k-1<<'\n';
for(i=1;i<k;i++) fout<<s[i]<<' ';
}
int main()
{
citire();
subsir();
return 0;
}