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Cod sursa(job #899117)
#include <iostream>
#include <fstream>
#define LMax 1026
using namespace std;
int M,N,Aux=1,A[LMax],B[LMax],C[LMax];
ifstream fin("cmlsc.in");
ofstream fout("cmlsc.out");
int main()
{
fin>>M>>N;
for(int i=1;i<=M;i++)
fin>>A[i];
for(int i=1;i<=N;i++)
{
fin>>B[i];
for(int j=1;j<=M;j++)
if(B[i]==A[j]) C[Aux++]=B[i];
}
fout<<Aux-1<<'\n';
for(int i=1;i<Aux;i++)
fout<<C[i]<<' ';
}