///#include <iostream>
#include <fstream>
#include <vector>
using namespace std;
ifstream cin("sortaret.in");
ofstream cout("sortaret.out");
const int nmax=50000;
int n,m,stiva[nmax+5],vf;
bool use[nmax+5];
vector<int>v[nmax+5];
void dfs(int nod)
{
    use[nod]=1;
    for(int i=0;i<v[nod].size();i++)
        if(use[v[nod][i]]==0)
            dfs(v[nod][i]);
    stiva[++vf]=nod;
}
int main()
{
    cin>>n>>m;
    for(int i=1;i<=m;i++)
    {
        int a,b;
        cin>>a>>b;
        v[a].push_back(b);
    }
    for(int i=1;i<=n;i++)
        if(use[i]==0)
            dfs(i);
    while(vf)
        cout<<stiva[vf--]<<" ";
    return 0;
}
/**
**/