#include <fstream>
#include <vector>

using namespace std;

ifstream f("sortaret.in");
ofstream g("sortaret.out");
vector <int>G[50002];
vector <int> ::iterator it;

int nr,x,y,i,n,m,sel[50002],v[500002];

void dfs(int x)
    {
        vector<int> :: iterator it;
        sel[x]=1;
        for (it=G[x].begin();it!=G[x].end();it++)
            if (sel[*it]==0)
                dfs(*it);
        v[++nr]=x;
    }


int main()
{
    f>>n>>m;
    for (i=1;i<=m;i++)  {
        f>>x>>y;
        G[x].push_back(y);
    }

     for(i=1;i<=n;i++)
        if(sel[i]==0)
            dfs(i);
     for(i=nr;i>=1;i--)
            g<<v[i]<<" ";

    return 0;
}