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Cod sursa(job #874475)
#include <fstream>
#define nmax 1025
using namespace std;
ifstream cin("cmlsc.in");
ofstream cout("cmlsc.out");
int n,i,j,nr=0,m,a[nmax],b[nmax],c[nmax];
int main()
{
cin>>n>>m;
for(i=1;i<=n;i++)
cin>>a[i];
for(j=1;j<=m;j++)
cin>>b[j];
for(i=1;i<=n;i++)
for(j=1;j<=m;j++)
if(a[i]==b[j])
c[i]=a[i];
for(i=1;i<=n;i++)
if(c[i]!=0)
{
nr++;
}
cout<<nr<<"\n";
for(i=1;i<=n;i++)
if(c[i]!=0)
{
cout<<c[i]<<' ';
}
return 0;
}