#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define int ll
#define pii pair<int,int>
#define F first
#define S second
#define pb push_back
#define all(v) v.begin(),v.end()
#define mem(a,i) memset(a,i,sizeof(a))

const int MAX=5e5+10;

int n,m;
vector<int> g[MAX],g1[MAX];
int use[MAX];

vector<int> top;

void dfs(int v){
    use[v]=1;
    for(auto to:g[v]){
        if(!use[to])dfs(to);
    }
    top.pb(v);
}

void calc(int v){
    use[v]=1;
    for(auto to:g[v]){
        if(use[to])continue;
        calc(to);
    }
}

bool ok[MAX];

bool solve(int i){
    if(i==n-1){
        ok[top[i]]=1;
        return 1;
    }
    for(auto to:g[top[i]]){
        if(to==top[i+1]){
            ok[top[i]]=solve(i+1);
        }
    }
    mem(use,0);
    calc(top[i]);
    int cnt=0;
    for(int i=1;i<=n;i++)cnt+=use[i];
    if(cnt==n-i){
        ok[top[i]]=1;
        return 1;
    }
    return 0;
}

bool ans[MAX];

void solve(){
    cin>>n>>m;
    for(int i=1;i<=m;i++){
        int a,b;
        cin>>a>>b;
        g[a].pb(b);
        g1[b].pb(a);
    }
    {
        mem(use,0);
        for(int i=1;i<=n;i++){
            if(!use[i]){
                dfs(i);
            }
        }
        mem(use,0);
        reverse(all(top));
        calc(top[0]);
        int cnt=0;
        for(int i=1;i<=n;i++){
            cnt+=use[i];
        }
        // cout<<cnt<<"\n";
        if(cnt==n){
            solve(0);
        }
    }
    for(int i=1;i<=n;i++){
        // cout<<top[i-1]<<" "<<ok[i]<<"\n"; 
        ans[i]=ok[i];
        ok[i]=0;
        swap(g[i],g1[i]);
    }
    top.clear();
    {
        mem(use,0);
        for(int i=1;i<=n;i++){
            if(!use[i]){
                dfs(i);
            }
        }
        mem(use,0);
        reverse(all(top));
        calc(top[0]);
        int cnt=0;
        for(int i=1;i<=n;i++){
            cnt+=use[i];
        }
        if(cnt==n){
            solve(0);
        }
    }

    for(int i=1;i<=n;i++){
        if(ans[i]||ok[i])cout<<1<<" ";
        else cout<<-1<<" ";
    }
}

signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int t=1;
    // cin>>t;
    while(t--)solve();
}