#include <cstdio>
#include <vector>
#include <stack>
#define NMAX 50000

using namespace std;

int freq[NMAX+5];
vector <int> v[NMAX+5];
stack <int> st;

void dp(int x)
{
    vector<int>::iterator i;
    for(i = v[x].begin(); i < v[x].end(); i++)
    {
        if(freq[*i]==0)
        {
            freq[*i]=1;
            dp(*i);
        }
    }
    st.push(x);
}

int main()
{
    freopen("sortaret.in","r",stdin);
    freopen("sortaret.out","w",stdout);
    int n,m,x,y,i;
    scanf("%d%d",&n,&m);
    for(i=1;i<=m;i++)
    {
        scanf("%d%d",&x,&y);
        v[x].push_back(y);
    }
    for(i=1;i<=n;i++)
    {
        if(freq[i]==0)
        {
            freq[i]=1;
            dp(i);
        }
    }
    while(!st.empty())
    {
        printf("%d ",st.top());
        st.pop();
    }
    return 0;
}