#include <cstdio>
#include <vector>
#include <algorithm>
#include <bitset>
#define Nmax 9000
using namespace std;
int N,M,L[Nmax],R[Nmax],LS[Nmax],RS[Nmax];
vector<int> G[Nmax];
bitset<Nmax> used;
void read()
{
scanf("%d%d",&N,&M);
int a,b;
for(int i = 1; i <= M; ++i)
{
scanf("%d%d",&a,&b);
G[a].push_back(b);
}
}
inline bool cuplaj(int k)
{
if(used[k]) return false;
used[k] = 1;
for(vector<int>::iterator it = G[k].begin(); it != G[k].end(); ++it)
if(!R[*it] || cuplaj(R[*it])) /// daca nu e cuplat vecinul atunci il cuplam
{ /// sau daca e cuplat incercam sa il cuplam altfel
L[k] = *it;
R[*it] = k;
return true;
}
return false;
}
void support(int k)
{
for(vector<int>::iterator it = G[k].begin(); it != G[k].end(); ++it)
if(!RS[*it])
{
RS[*it] = 1;
LS[R[*it]] = 0;
support(R[*it]);
}
}
int main()
{
freopen("felinare.in","r",stdin);
freopen("felinare.out","w",stdout);
read();
int ok = 1,nr_cuplate = 0;
while(ok)
{
ok = 0;
used = 0;
for(int i = 1; i <= N; ++i)
if(!L[i] && cuplaj(i))
{
ok = 1;
nr_cuplate++;
}
}
printf("%d\n",2*N-nr_cuplate);
for(int i = 1; i <= N; ++i)
{
if(L[i]) LS[i] = 1;
if(L[R[i]] != i) R[i] = 0;
}
for(int i = 1; i <= N; ++i)
if(!LS[i]) support(i);/// cuplajul maxim reprezinta taietura minima
for(int i = 1; i <= N; ++i)
{
if(!LS[i] && ! RS[i]) printf("3\n");
else
if(!LS[i]) printf("2\n");
else
if(!RS[i]) printf("1\n");
else
printf("0\n");
}
return 0;
}