#include<fstream.h>
#include<stdlib.h>
#define dim 50001

unsigned long n,m,n2;//i,j,x,y;
int *a[dim];
int vect[dim],viz[dim];

void dfs(unsigned long xx)
{
ifstream f("sortaret.in");
ofstream g("sortaret.out");

unsigned long i;

viz[xx]=1;

for(i=1;i<=a[xx][0];i++)
 if(!viz[a[xx][i]]) dfs(a[xx][i]);

vect[++n2]=xx;
}

int main()
{
unsigned long i,j,x,y;

f>>n>>m;
for(i=1;i<=n;i++)
{a[i]=(int*)realloc(a[i],sizeof(int)) ;
 a[i][0]=0;
}
for(i=1;i<=m;i++)
{f>>x>>y;
 a[x][0]++;
 a[x]=(int*)realloc(a[x],a[x][0]*sizeof(int));
 a[x][a[x][0]]=y;
}
f.close();

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

for(i=n;i>=1;i--) g<<vect[i]<<" ";

g<<'\n';
g.close();
return 0;
}