#include<iostream>
#include<cstdio>
#include<cstring>
#include<vector>
#define pb push_back
#define MAXN 50010
using namespace std;
vector <int>  G[MAXN],St;
int n,m,x,y,i;
bool sel[MAXN];

void DF(int x)
{
    int i;
    sel[x]=true;
    for(i=0;i<(int)G[x].size();++i)
        if(!sel[G[x][i]])
            DF(G[x][i]);
    St.pb(x);
}

int main()
{
    freopen("sortaret.in","r",stdin);
    freopen("sortaret.out","w",stdout);
    scanf("%d%d",&n,&m);
    for(; m>0; --m)
    {
        scanf("%d%d",&x,&y);
        G[x].pb(y);
    }
    memset(sel,false,sizeof(sel));
    for(i=1;i<=n;++i)
        if(!sel[i])
            DF(i);
    for(i=(int)St.size()-1;i>=0;--i)
        printf("%d ",St[i]);
    printf("\n");
    return 0;
}