#include <fstream>
#include <vector>
#define DIM 50011
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
int n,m,sol[DIM];
bool viz[DIM],viz1[DIM];

vector<int> L[DIM];

void dfs(int nod){
    viz[nod]=true;
    for(register int i=0;i<L[nod].size();i++){
        if(!viz[L[nod][i]]){
           dfs(L[nod][i]);
        }
    }
    sol[++sol[0]]=nod;
}

int main(void){
    register int i,j,k,x,y;

    f>>n>>m;
    for(i=1;i<=m;i++){
        f>>x>>y;
        L[x].push_back(y);
        viz1[y]=true;
    }

    for(i=1;i<=n;i++){
        if(!viz1[i] && !viz[i])
            dfs(i);
        j=1,k=sol[0];
        while(j<=k)
            x=sol[j],sol[j++]=sol[k],sol[k--]=x;
    }

    for(i=1;i<=n;i++)
        g<<sol[i]<<" ";
    f.close();
    g.close();
    return 0;
}