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Cod sursa(job #863283)
#include <cstdio>
int n,m,a[1025],b[1025],mat[1025][1025];
void citire()
{
int i;
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]);
}
int maxim(int a, int b)
{
if(a>b)
return a;
else
return b;
}
void rez()
{
int i,j;
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]=maxim(mat[i][j-1],mat[i-1][j]);
}
}
void afisare(int i, int j)
{
if(i<=1 && j<=1)
return ;
if(a[i]==b[j])
{
afisare(i-1,j-1);
printf("%d ",a[i]);
}
else
{
if(mat[i][j-1]>mat[i-1][j])
{if(j>1)
afisare(i,j-1);
else
if(i>1)
afisare(i-1,j);
}
else
{
if(i>1)
afisare(i-1,j);
else
if(j>1)
afisare(i,j-1);
}
}
}
int main()
{
freopen("cmlsc.in","r",stdin);
freopen("cmlsc.out","w",stdout);
citire();
rez();
printf("%d\n",mat[n][m]);
afisare(n,m);
return 0;
}