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Cod sursa(job #613051)
#include <stdio.h>
using namespace std;
int a[1260][1260];
int A[1260];
int B[1260];
int n;
int m;
int max(int a, int b)
{
if(a>b)
return a;
return b;
}
void citire()
{
scanf("%d %d",&n,&m);
for(int i=1 ; i<=n ;i++)
{
scanf("%d",&A[i]);
}
for(int i=1 ; i<=m ;i++)
{
scanf("%d",&B[i]);
}
}
void rez()
{
for(int i=1;i<=n;i++)
{
for(int j=1;j<=m;j++)
{
if(A[i]==B[j] )
{
a[i][j]=a[i-1][j-1]+1;
}
else
a[i][j]=max(a[i-1][j],a[i][j-1]);
}
}
printf("%d\n",a[n][m]);
}
void afis(int i, int j)
{
if(a[i-1][j]==a[i][j-1] && a[i-1][j]==0 && a[i][j]==1)
{
printf("%d ",A[i]);
return;
}
if(a[i-1][j]<a[i][j] && a[i][j-1]<a[i][j])
{
if(a[i][j-1]>a[i-1][j])
{
afis(i,j-1);
}
else
{
afis(i-1,j);
}
printf("%d ",A[i]);
return;
}
if(a[i][j-1]>a[i-1][j])
{
afis(i,j-1);
}
else
{
afis(i-1,j);
}
}
int main()
{
freopen("cmlsc.in","r",stdin);
freopen("cmlsc.out","w",stdout);
citire();
rez();
afis(n,m);
return 0;
}