#include <stdio.h>
#include <vector>
#define NMax 50002
using namespace std;
vector<int> G[NMax];
int terminare[NMax];
int viz[NMax];
int n,m,k;
void citire()
{
    int x,y,i;
    freopen("sortaret.in","r",stdin);
    scanf("%d%d",&n,&m);
    for(i=1;i<=m;i++)
    {
        scanf("%d%d",&x,&y);
        G[x].push_back(y);
    }
}
void dfs(int x)
{
    vector<int>::iterator it;
    viz[x]=1;
    for(it=G[x].begin();it!=G[x].end();it++)
    {
        if(!viz[*it]) {dfs(*it); }
    }
    terminare[++k]=x;
}
int main()
{
    freopen("sortaret.out","w",stdout);
    int i;
    citire();
    for(i=1;i<=n;i++)
    {
        if(!viz[i]) dfs(i);
    }
    for(i=k;i>=1;i--) printf("%d ",terminare[i]);
}