#include<stdio.h>
#include<vector>
using namespace std;
FILE *f=fopen("sortaret.in","r");
FILE *g=fopen("sortaret.out","w");
#define M 50001
long n,m;
vector<long>a[M];
long postord[M],nr=0;
bool viz[M];

void dfs(long x)
{
	long i;
	viz[x]=1;
	for(i=0;i<a[x].size();++i)
		if(viz[a[x][i]]==0) dfs(a[x][i]);
	postord[++nr]=x;
}

void afis()
{
	long i;
	for(i=n;i>=1;--i)
		fprintf(g,"%ld ",postord[i]);
	fclose(g);
}

void cit()
{
	long i,x,y;
	fscanf(f,"%ld%ld",&n,&m);
	for(i=1;i<=m;++i)
	{
		fscanf(f,"%ld%ld",&x,&y);
		a[x].push_back(y);
	}
	fclose(f);
}

int main()
{
	cit();
	long i;
	for(i=1;i<=n;++i)
		if(!viz[i]) dfs(i);
	afis();
	return 0;
}