#include<stdio.h>
#include<stdlib.h>
#define N 50001
int n,m,v[N],*g[N],w[N],a[2*N],b[2*N],i,u[N],k;
void D(int i)
{
    int j;
    for(v[i]=1,j=0;j<w[i];++j)
        if(!v[g[i][j]])
            D(g[i][j]);
    u[++k]=i;
}
int main()
{
	freopen("sortaret.in","r",stdin),freopen("sortaret.out","w",stdout),scanf("%d%d",&n,&m);
    for(i=0;i<m;++i)
        scanf("%d%d",a+i,b+i),++w[a[i]];
    for(i=1;i<=n;w[i++]=0)
    	g[i]=(int*)malloc(4*w[i]);
    for(i=0;i<m;++i)
    	g[a[i]][w[a[i]]++]=b[i];
    for(i=1;i<=n;++i)
        if(!v[i])
        	D(i);
    for(i=n;i;--i)
    	printf("%d ",u[i]);
    return 0;
}