#include <iostream>
#include <vector>
#include <stdio.h>
#include <stack>
#define NMax 50005
using namespace std;
vector<int> Graf[NMax];
int N,M,x,y;
stack<int> Stiva;
bool mark[NMax];

void Read()
{
    scanf("%d%d",&N,&M);
    for(int i=1;i<=M;i++)
    {
        scanf("%d%d",&x,&y);
        Graf[x].push_back(y);
    }
}

void DFS(int nod)
{
    mark[nod]=true;
    for(vector<int>::iterator it=Graf[nod].begin();it!=Graf[nod].end();it++)
        if(mark[*it]==false)
            DFS(*it);
    Stiva.push(nod);
}

void Write()
{
    while(Stiva.empty()==false)
    {
        printf("%d ",Stiva.top());
        Stiva.pop();
    }
}

int main()
{
    freopen("sortaret.in","r",stdin);
    freopen("sortaret.out","w",stdout);
    Read();

    for(int i=1;i<=N;++i)
        if(mark[i]==false)
        {
            mark[i]=1;
            DFS(i);
        }

    Write();
}