#include<bits/stdc++.h>
using namespace std;
FILE *f=fopen("sortaret.in","r");
FILE *g=fopen("sortaret.out","w");
const int NMAX = 50004;
vector<int> G[NMAX];
bitset<NMAX>viz;
int N,M;
stack<int> stiva;
void DFS(int nodCurent)
{
    viz[nodCurent]=true;
    for(auto nodVecin:G[nodCurent])
        if(!viz[nodVecin])DFS(nodVecin);

    stiva.push(nodCurent);
}
void Read()
{
    fscanf(f,"%d%d",&N,&M);
    for(int i=1;i<=M;i++)
    {
        int x,y;fscanf(f,"%d%d",&x,&y);
        G[x].push_back(y);
    }
    fclose(f);
}
int main()
{
    Read();
    for(int i=1;i<=N;i++)
        if(!viz[i])DFS(i);

    while(!stiva.empty())
    {
        fprintf(g,"%d ",stiva.top());
        stiva.pop();
    }

    fclose(g);
    return 0;

}