#include <fstream>
#include <vector>
#define DIM 9000

using namespace std;

ifstream f("felinare.in");
ofstream g("felinare.out");

vector <int> ls[DIM];
bool stinsL[DIM], stinsR[DIM];
int viz[DIM];
int n, k, i, j, x, y, cnt;
int Left[DIM], Right[DIM];

bool pairup(int x) {
    if (viz[x] == k)
        return 0;
    viz[x] = k;
    int i, y;
    for (i = 0; i < ls[x].size(); i++) {
        y = ls[x][i];
        if (Left[y] == 0 || pairup(Left[x]) == 1) {
            Left[y] = x;
            Right[x] = y;
            return 1;
        }
    }
    return 0;
}

void aprinde(int x) {
    int i, y;
    for (i = 0; i < ls[x].size(); i++) {
        y = ls[x][i];
        if (stinsR[y] == 0) {
            stinsR[y] = 1;
            stinsL[Left[y]] = 0;
            aprinde(Left[y]);
        }
    }
}

int main() {
    int m;
    f >> n >> m;
    for (i = 1; i <= m; i++) {
        f >> x >> y;
        ls[x].push_back(y);
    }
    for (i = 1; i <= n; i++)
        if (!viz[i]) {
            k = i;
            cnt += pairup(i);
        }

    g << 2*n-cnt << '\n';

    for (i = 1; i <= n; i++)
        if (Right[i] != 0)
            stinsL[i] = 1;

    for (i = 1; i <= n; i++)
        if (Right[i] == 0)
            aprinde(i);

    for (i = 1; i <= n; i++) {
        x = 0;
        if (stinsL[i] == 0)
            x++;
        if (stinsR[i] == 0)
            x += 2;
        g << x << '\n';
    }

    return 0;
}