#define MAX 50005
#include <cstdio>
#include <vector>
using namespace std;

vector<int> g[MAX];
int t=1,n,m;
bool f[MAX];
int r[MAX],p[MAX];

void tarjan(int k){
    if(f[k])
        return;
    f[k]=true;
    for(int i=0; i<g[k].size(); ++i)
        tarjan(g[k][i]);
    r[t++]=k;
}

int main(void){
    freopen("sortaret.in","r",stdin);
    freopen("sortaret.out","w",stdout);
    scanf("%d%d",&n,&m);
    for(int a,b,i=0; i<m; ++i){
        scanf("%d%d",&a,&b);
        g[a].push_back(b);
    }

    for(int i=1; i<=n; ++i)
        tarjan(i);

    for(int i=n; i>=1; --i)
        printf("%d ",r[i]);
    return 0;
}