#include<stdio.h>

int *x, *y, *b, *c, *viz, index;
int n, m;

void df(int a){
	viz[a] = 1;
	int l = m;
	for(int i=0;i<l;i++)
		if(a == x[i] && !viz[y[i]]){
			int val = y[i];
			if(m != 0){
				x[i] = x[m-1];
				y[i] = y[(m--)-1];
			}
			df(val);
		}
	c[index++] = a;	
}

void sort(){
	for(int i=1;i<=n;i++)
		if(!b[i]) df(i);
}


int main()
{
	FILE *ofile, *ifile;
	
	ifile = fopen("sortaret.in", "r");
	fscanf(ifile, "%i %i", &n, &m);

	x = new int[m];
	y = new int[m];

	b = new int[n+1];
	c = new int[n];
	viz = new int[n+1];
	
	for(int i=0;i<=n;i++)
		b[i] = viz[i] = 0;

	for(int i=0; i<m; i++){
		fscanf(ifile, "%i %i", &x[i], &y[i]);
		b[y[i]] = 1;
	}
	
	fclose(ifile);	
	
	sort();

	ofile = fopen("sortaret.out", "w");
	
	for(int i=index-1;i>=0;i--)
	       fprintf(ofile, "%i ", c[i]);

	fclose(ofile);

	return 0;
}