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Cod sursa(job #488157)
#include <stdio.h>
int i,j,n,m,a[1026],b[1026],mx[1026][1026],nr,v[1026],w;
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]);
for(i=1;i<=n;i++)
for(j=1;j<=m;j++)
if(a[i]==b[j]) mx[i][j]=mx[i-1][j-1]+1;
else
if(mx[i-1][j]>mx[i][j-1]) mx[i][j]=mx[i-1][j];
else
mx[i][j]=mx[i][j-1];
printf("%d\n",mx[n][m]);
i=n;
j=m;
nr=mx[n][m];
w=0;
while(i!=0&&j!=0&&nr!=0)
{
while(mx[i][j-1]==nr) j--;
while(mx[i-1][j]==nr) i--;
nr--;
v[++w]=b[j];
i--;
j--;
}
for(i=w;i>1;i--)
printf("%d ",v[i]);
printf("%d\n",v[1]);
return 0;
}