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Cod sursa(job #689704)
#include<fstream.h>
#define MAX(a,b) a>b?a:b
ifstream fin("cmlsc.in");
ofstream fout("cmlsc.out");
namespace std;
int c[1025][1025],n,m,i,j,max,a[1025],b[1025],sol[1025];
int main()
{
fin>>n>>m;
for(i=1;i<=n;i++)
fin>>a[i];
for(i=1;i<=m;i++)
fin>>b[i];
for(i=1;i<=n;i++)
{
for(j=1;j<=m;j++)
{
if(a[i] == b[j])
c[i][j] = c[i-1][j-1]+1;
else
c[i][j] = MAX(c[i-1][j],c[i][j-1]);
}
}
int lg=0;
for(i=n;i>=1;i--)
for(j=m;j>=1;j--)
if(a[i] == b[j])
sol[++lg]=a[i];
else
if(c[i-1][j]<c[i][j-1])
j--;
else
i--;
fout<<c[n][m]<<'\n';
for(i=lg;i>=1;i--)
fout<<sol[i]<<' ';
return 0;
}