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Cod sursa(job #280255)
#include <fstream>
#include <algorithm>
#include <stdio.h>
using namespace std;
#define N 1030
ifstream fin("cmlsc.in");
ofstream fout("cmlsc.out");
int n,m,a[N],b[N],c[N][N];
void citire()
{
fin>>n>>m;
for(int i=1;i<=n;i++)
fin>>a[i];
for(int i=1;i<=m;i++)
fin>>b[i];
}
int maxim(int a,int b)
{
if(a>b)
return a;
return b;
}
int main()
{
citire();
int s=0,sol[N];
for(int i=1;i<=n;i++)
for(int j=1;j<=m;j++)
{
if(a[i]==b[j])
c[i][j]=1+c[i-1][j-1];
else
c[i][j]=maxim(c[i-1][j],c[i][j-1]);
}
//fout<<c[n][m]<<'\n';
int i=n;
int j=m;
while(i)
{
if(a[i]==b[j])
{
sol[++s]=a[i];
i--;
j--;
}
else
if(c[i-1][j] < c[i][j-1])
j--;
else
i--;
}
fout<<s<<'\n';
for(int i=s;i>=1;i--)
fout<<sol[i]<<' ';
fout<<'\n';
return 0;
}