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Cod sursa(job #486181)
#include <fstream>
using namespace std;
int i, j, n, m, nr, a[1024], b[1024], c[1024][1024], d[1024];
int main()
{
freopen("cmlsc.in", "r", stdin);
freopen("cmlsc.out", "w", stdout);
scanf("%d %d", &m, &n);
for(i = 1; i<=m; i++)
scanf("%d", a + i);
for(i = 1; i<=n; i++)
scanf("%d", b + i);
for(i = 1; i<=m; i++)
for(j = 1; j<=n; j++)
if(a[i] == b[j])
c[i][j] = 1 + c[i - 1][j - 1];
else
c[i][j] = max(c[i][j - 1], c[i - 1][j]);
for(i = m, j = n; i;)
if(a[i] == b[j])
{
nr++;
d[nr] = a[i];
i--;
j--;
}
else if(c[i - 1][j] < c[i][j - 1])
j--;
else
i--;
printf("%d\n", nr);
for(i = nr; i>0; i--)
printf("%d ", d[i]);
}