#include <cstdio>
#include <vector>

#define NMAX 50000
#define MMAX 100000

static std::vector<int> result;
static int n, m, adj[NMAX];
static bool visited[NMAX];

static struct edge {
    int v, e;
} edges[MMAX+1];

static void dfs(int s)
{
    int i;

    visited[s] = true;

    for (i = adj[s]; i; i = edges[i].e) {
        if (!visited[edges[i].v]) {
            dfs(edges[i].v);
        }
    }

    result.push_back(s);
}

int main()
{
    int u, v, i;
    std::vector<int>::const_reverse_iterator crit;

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

    scanf("%d %d", &n, &m);

    for (i = 1; i <= m; i++) {
        scanf("%d %d", &u, &v);

        edges[i].v = v;
        edges[i].e = adj[u];
        adj[u] = i;
    }

    for (i = 1; i <= n; i++) {
        if (!visited[i]) {
            dfs(i);
        }
    }

    for (crit = result.rbegin(); crit != result.rend(); crit++) {
        printf("%d ", *crit);
    }

    return 0;
}