#include<cstdio> 
#include<vector> 
using namespace std; 
vector<int>v[50005]; 
int x,y,n,i,j,k,m; 
bool viz[50005]; 
void df(int x) 
{ 
viz[x]=true;
printf("%d ",x); 
for (j=0;j<v[x].size();j++) if (!viz[v[x][j]]) df(v[x][j]); 
} 
int main() 
{ 
freopen("sortaret.in","r",stdin); 
freopen("sortaret.out","w",stdout); 
scanf("%d %d",&n,&m); 
for(i=1;i<=m;i++) scanf("%d %d",&x,&y),v[x].push_back(y); 
for(i=1;i<=n;i++) if (!viz[i]) df(i); 
return 0; 
}