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

#define ll long long

ifstream fin("sortaret.in");
ofstream fout("sortaret.out");

vector<int> viz;
vector<int> la[50005];
stack<int> topo;

void dfs(int nod){
    viz[nod]=1;
    for(auto &r: la[nod]){
        if(!viz[r])
            dfs(r);
    }
    topo.push(nod);
}

int main()
{
	ios::sync_with_stdio(false);
	fin.tie(nullptr);

	int n, m;
    fin>>n>>m;
    viz.resize(n+1);

    for(int i=0;i<m;i++){
        int x, y;
        fin>>x>>y;
        la[x].push_back(y);
    }

    for(int i=1;i<=n;i++){
        if(!viz[i])
            dfs(i);
    }

    while(!topo.empty()){
        fout<<topo.top()<<" ";
        topo.pop();
    }

    return 0;
}