#include <bits/stdc++.h>
#define Nmax 100005

using namespace std;
vector<int> G[Nmax],sol;
int N,M,used[Nmax];

void Read()
{
    scanf("%d%d",&N,&M);
    int a,b;
    for(int i = 1; i <= M; ++i)
    {
        scanf("%d%d",&a,&b);
        G[b].push_back(a);
    }
}

void DFS(int k)
{
    used[k] = 1;
    for(auto it : G[k])
        if(!used[it])
            DFS(it);
    printf("%d ",k);
}


int main()
{
    freopen("sortaret.in","r",stdin);
    freopen("sortaret.out","w",stdout);

    Read();
    for(int i = 1; i <= N; ++i)
        if(!used[i])
            DFS(i);
    return 0;
}