#include <fstream>
#include <vector>
#include <bitset>
using namespace std;
ifstream cin("sortaret.in");
ofstream cout("sortaret.out");

int n,m,x,y;
vector<int> a[50010],ord;
bitset<50010> viz;

void dfs(int k)
{
    vector<int>::iterator it;
    viz.set(k,1);
    ord.push_back(k);
    for (it=a[k].begin();it!=a[k].end();it++)
        if (viz.test(*it)==false)
            dfs(*it);
}

int main()
{
    int i,j;
    vector<int>::iterator it;
    cin>>n>>m;
    for (i=1;i<=m;i++)
    {
        cin>>x>>y;
        a[x].push_back(y);
    }
    viz.reset();
    for (i=1;i<=n;i++)
        if (viz.test(i)==false)
            dfs(i);
    for (it=ord.begin();it!=ord.end();it++)
        cout<<*it<<" ";
}