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

ifstream f("sortaret.in");
ofstream g("sortaret.out");

int n,m,ans[50005],viz[50005],k;
vector<int>w[50005];

void dfs(int x)
{
    viz[x]=1;
    for(auto it:w[x])
    {
        if(viz[it]==0)
        {
            viz[it]=1;
            dfs(it);
        }
    }
    k++;
    ans[k]=x;
}

signed main()
{
    int i,x,y;
    f>>n>>m;
    for(i=1;i<=m;i++)
    {
        f>>x>>y;
        w[x].push_back(y);
    }
    for(i=1;i<=n;i++)
    {
        if(viz[i]==0)
        {
            dfs(i);
        }
    }
    for(i=k;i>=1;i--)
        g<<ans[i]<<" ";
    return 0;
}