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Cod sursa(job #811201)
#include <fstream>
#define Nmax 1030
#define Mmax 1030
using namespace std;
ifstream fin("cmlsc.in");
ofstream fout("cmlsc.out");
int n,m;
int a[Nmax];
int b[Mmax];
int lcs[Nmax][Mmax];//longest common subsequence
int sol[Nmax];
int soli[Nmax];
int aux=0;
void citire();
void pd();
int maxim(int k, int l);
void afisare();
void citire(){
int i,j;
fin>>n;
fin>>m;
for(i=0;i<n;i++)
fin>>a[i];
for(j=0;j<m;j++)
fin>>b[j];
}
void pd(){
int i,j;
for(i=0;i<=n;i++)
lcs[i][m]=0;
for(j=0;j<m;j++)
lcs[n][j]=0;//cazurile cele mai mici
for(i=n-1;i>=0;i--)
for(j=m-1;j>=0;j--)
if(a[i]==b[j]){
lcs[i][j]=1+lcs[i+1][j+1];
sol[aux]=a[i];
soli[aux]=lcs[i][j];
aux++;
}
else
lcs[i][j]=max(lcs[i][j+1],lcs[i+1][j]);
}
int maxim(int k, int l){
if(k>l)
return k;
return l;
}
void afisare(){
int mx=lcs[0][0];
fout<<lcs[0][0]<<'\n';
aux--;
while(mx>=1){
if(soli[aux]==mx){
fout<<sol[aux]<<' ';
mx--;
}
aux--;
}
}
int main(){
citire();
pd();
afisare();
fout.close();
return 0;
}