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Cod sursa(job #418775)
#include<stdio.h>
#include<algorithm>
using namespace std;
int n,m,a[1025],b[1025],i,j,mat[1025][1025],v[1025],k=1,poz;
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",&a[i]);
}
for(i=1;i<=m;i++){
scanf("%d",&b[i]);
}
if(a[1]==b[1]){
mat[1][1]=1;
}
for(i=1;i<=n;i++){
for(j=1;j<=m;j++){
if(a[i]==b[j]){
mat[i][j]=mat[i-1][j-1]+1;
}else{
mat[i][j]=max(mat[i-1][j],mat[i][j-1]);
}
}
}
printf("%d\n",mat[n][m]);
i=n;
j=m;
while(i>0&&j>0){
if(a[i]==b[j]){
v[k]=a[i];
k++;
}else{
if (mat[i-1][j]<mat[i][j-1])
--j;
else
--i;
}
}
for(i=mat[n][m];i>=1;i--){
printf("%d ",v[i]);
}
return 0;
}