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Cod sursa(job #811345)
#include <fstream>
#define maxim(x,y) ((x>y)?x:y)
using namespace std;
ifstream fin("cmlsc.in");
ofstream fout("cmlsc.out");
int m,n,a[1025],b[1025],lcs[1025][2025],op[1025][1025];
void citire();
void pd();
void afisare();
int main()
{
citire();
pd();
afisare();
fout.close();
return 0;
}
void citire()
{
int i,j;
fin>>n>>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=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];
op[i][j]=1;
}
else
{
lcs[i][j]=maxim(lcs[i+1][j],lcs[i][j+1]);
if(lcs[i+1][j>=lcs[i][j+1]])
op[i][j]=2;
else
if(lcs[i+1][j]<lcs[i][j+1])
op[i][j]=3;
}
}
void afisare()
{
int i,j;
fout<<lcs[0][0]<<'\n';
while(op[i][j]==1)
{
fout<<a[i]<<' ';
i++;
j++;
if(op[i][j]==2)
i++;
if(op[i][j]==3)
j++;
}
}