#include <iostream>
#include <fstream>
#include <climits>
#include <vector>
#include <queue>
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
vector<vector<int> > a(50000);
queue<int> c;
int dp[50001],viz[50001];
int n,m,contor;
int main()
{
    f>>n>>m;
    for(int i=1;i<=m;i++)
    {
        int x1,x2;
        f>>x1>>x2;
        a[x1].push_back(x2);
        dp[x2]++;
    }
    for(int i=1;i<=n;i++)
        if(dp[i]==0) c.push(i);
    while(!c.empty())
    {
        int var=c.front();
        c.pop();
        g<<var<<" ";
        for(int i=0;i<a[var].size();i++)
            if(viz[a[var][i]]==0)
        {
            viz[a[var][i]]=1;
            c.push(a[var][i]);
        }
    }
    return 0;
}