#include <bits/stdc++.h>
using namespace std;

ifstream fin("sortaret.in");
ofstream fout("sortaret.out");

stack <int> S;
bool f[50005];

vector <int> a[50005];
int n,m;
int viz[50005];

void read()
    {
        int i,x,y,j;
        fin>>n>>m;
        for(i=1;i<=m;++i)
        {
            fin>>x>>y;
            a[x].push_back(y);
        }
    }

void Fill(int varf)
{
    int i;
    viz[varf]=1;
    for(i=0;i<a[varf].size();++i)
        if(viz[a[varf][i]]==0)
            Fill(a[varf][i]);
    S.push(varf);
}


int main()
{
    read();
    for(int i=1;i<=n;++i)
        if(viz[i]==0) Fill(i);
    while(S.size()>0)
    {
        fout<<S.top()<<" ";
        S.pop();
    }
    return 0;
}