#include <fstream>
#include <vector>
#define pb push_back
using namespace std;
vector <int> G[50005];
int n,m,nr,v[50005],viz[50005];
ifstream f("sortaret.in");
ofstream g("sortaret.out");
inline void dfs(int x)
{
    int i;
    viz[x]=1;
    for (i=0;i<G[x].size();i++)
        if (viz[G[x][i]]==0)
            dfs(G[x][i]);
    v[++nr]=x;
}
int main()
{
    int i,x,y;
    f>>n>>m;
    for (i=1;i<=m;i++) {
        f>>x>>y;
        G[x].pb(y);
    }
    for (i=1;i<=n;i++)
        if (viz[i]==0) dfs(i);
    for (i=n;i>=1;i--)
        g<<v[i]<<' ';
    return 0;
}