#include <cstdio>
#include <iostream>
#include <vector>
#define NMAX 50010
using namespace std;

vector<int> v[NMAX];
int poz, viz[NMAX], N, M, i, ord[NMAX];
void iFu(void)
{
	int x, y;
	FILE *f = fopen("sortaret.in", "r");
	fscanf(f, "%d%d", &N, &M);
	for(i = 1; i <= M; ++i)
		fscanf(f, "%d%d", &x, &y), v[x].push_back(y);
	
	fclose(f);
}
void DFS(int nod)
{
	viz[nod] = 1;
	for(i = 0; i < v[nod].size(); ++i)
		if(!viz[v[nod][i]])
			DFS( v[nod][i] );
	ord[++poz] = nod;
}
void solve(void)
{
	for(i = 1; i <= N; ++i)
		if(!viz[i])
			DFS(i);
}
void oFu(void)
{
	FILE *g = fopen("sortaret.out", "w");
	for(i = N; i > 0; --i)
		fprintf(g, "%d ", ord[i]);
	fclose(g);
}

int main(void)
{
	iFu();
	solve();
	oFu();
	
	return 0;
}