#include <cstdio>
#include <vector>
#include <queue>

#define in "sortaret.in"
#define out "sortaret.out"
#define NMAX 50000 + 7
#define pb push_back

using namespace std;
int n, m, inD[NMAX], a, b;
vector <int> adj[NMAX];
queue <int> order, sol;

inline void getInput()
{
    scanf("%d ", &n, &m);
    for(int i = 1; i<= m; ++i)
    {
        scanf("%d %d ", &a, &b);
        adj[a].pb(b);
        inD[b] ++;
    }
}
inline void makeSort()
{
    for(int i = 1; i<= n; ++i)
    {
        if(inD[i] == 0) order.push(i);
    }
    while(!order.empty())
    {
        int tmp = order.front();
        sol.push(tmp);
        int sze = adj[tmp].size();
        for(int i = 0; i< sze; ++i)
        {
            inD[adj[tmp][i]] --;
            if(inD[adj[tmp][i]] == 0) order.push(adj[tmp][i]);
        }
        order.pop();
    }
}
inline void giveOutput()
{
    while(!sol.empty())
    {
        int tmp = sol.front();
        printf("%d ", tmp);
        sol.pop();
    }
    printf("\n");
}

int main()
{
    freopen(in, "r", stdin);
    freopen(out, "w", stdout);
    getInput();
    makeSort();
    giveOutput();
    return 0;
}