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Cod sursa(job #763383)
#include <cstdio>
#include <algorithm>
using namespace std;
#define MAX 1025
int n,m,c[MAX][MAX];
class vector{
public:
int x[MAX];
void get(int n){
for(int i=1;i<=n;i++)scanf("%d",&x[i]);
}
}a,b;
void DP(){
for(int i=1;i<=n;i++)
for(int j=1;j<=m;j++)
if(a.x[i]==b.x[j]) c[i][j] = 1 + c[i-1][j-1]; else
c[i][j] = max(c[i-1][j],c[i][j-1]);
}
void tipar(int n,int m){
if(c[n][m]>0)
{
if(a.x[n]==b.x[m])
{
tipar(n-1,m-1);
printf("%d ",a.x[n]);
} else
if(c[n-1][m]>c[n][m-1])tipar(n-1,m); else tipar(n,m-1);
}
}
int main(){
freopen("cmlsc.in","r",stdin);
freopen("cmlsc.out","w",stdout);
scanf("%d %d",&n,&m);
a.get(n);
b.get(m);
DP();
printf("%d\n",c[n][m]);
tipar(n,m);
// for(int i=1;i<=n;i++)printf("%d ",a.x[i]); printf("\n");
// for(int i=1;i<=m;i++)printf("%d ",b.x[i]); printf("\n");
return 0;
}