#include <bits/stdc++.h>

using namespace std;

#define     mp              make_pair
#define     fs              first
#define     sc              second
#define     pob             pop_back
#define     pub             push_back
#define     eps             1E-7
#define     sz(a)           a.size()
#define     count_one       __builtin_popcount;
#define     count_onell     __builtin_popcountll;
#define     fastIO          ios_base::sync_with_stdio(false)
#define     PI              (acos(-1.0))
#define     linf            (1LL<<62)//>4e18
#define     inf             (0x7f7f7f7f)//>2e9

#define MAXN 50010

int n, m;
bitset<MAXN> viz;
vector<int> vec[MAXN];

void dfs(int nod) {
    viz[nod] = true;
    printf("%d ", nod);
    for(auto it : vec[nod])
        if(!viz[it])
            dfs(it);
}

void read() {
    #ifndef ONLINE_JUDGE
    assert(freopen("sortaret.in", "r", stdin));
    assert(freopen("sortaret.out", "w", stdout));
    #endif

	scanf("%d%d", &n, &m);
	int x, y;
	for(int i = 0; i < m; ++i) {
        scanf("%d%d", &x, &y);
        vec[x].pub(y);
	}

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

int main() {
	read();

    return 0;
}