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Cod sursa(job #533323)
#include<cstdio>
using namespace std;
int m,n,i,j,lcs[1025][1025],x[1025],y[1025];
void rezolva(){
for(int i=1;i<=n;i++)
for(int j=1;j<=m;j++)
if(x[i]==y[j]) lcs[i][j]=1+lcs[i-1][j-1];
else
if (lcs[i-1][j]>lcs[i][j-1]) lcs[i][j]=lcs[i-1][j];
else lcs[i][j]=lcs[i][j-1];
}
void afiseaza_solutie_max(int i,int j){
if(lcs[i][j])
if(x[i]==y[j])
{
afiseaza_solutie_max(i-1,j-1);
printf("%d ", x[i]);
}
else
{
if (lcs[i][j]==lcs[i-1][j])
afiseaza_solutie_max(i-1,j);
else if (lcs[i][j]==lcs[j][i-1])
afiseaza_solutie_max(i,j-1);
}
}
int main()
{
freopen("cmlsc.in","r",stdin);
freopen("cmlsc.out","w",stdout);
scanf("%d %d", &n, &m);
for(i=1;i<=n;i++)
scanf("%d", &x[i]);
for(j=1;j<=m;j++)
scanf("%d", &y[j]);
rezolva();
printf("%d\n", lcs[n][m]);
afiseaza_solutie_max(n,m);
return 0;
}