#include<fstream>
#include<vector>
#include<queue>
#include<cstring>
using namespace std;
ofstream fout("sortaret.out");
ifstream fin("sortaret.in");
const long int MMAX = 100500;

int n, m, varf;
int viz[50001];
vector<int> v[MMAX];
queue<int> q;

void citire()
{
    int x, y;
    fin >> n >> m;
    for(int i=1; i<=m; i++) {
        fin >> x >> y;
        v[x].push_back(y);
        viz[y] = 1;
    }

    for(int i=1; i<=n; i++)
        if(!viz[i]) varf = i;
    q.push(varf);

    memset(viz, 0, sizeof(viz));
    viz[varf] = 1;
}

void topsort(int x)
{
    int yolo;
    while(!q.empty()) {
        yolo = q.front();
        q.pop();
        for(int i=0; i<v[yolo].size(); i++) {
            if(!viz[v[yolo][i]]) {
                q.push(v[yolo][i]);
                viz[v[yolo][i]] = 1;
            }
        }
        fout << yolo << ' ';
    }
}

int main()
{
    citire();
    topsort(varf);

    fin.close();
    fout.close();
    return 0;
}