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#include<cstdio>
const int N=50001,M=100000;
int m,i,a[M],b[M],*g[N],w[N],u[N],k,n;
bool v[N];
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]=new int[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]);
}