#include <cstdio>
#include <vector>
#include <stack>
#include <bitset>
using namespace std;
FILE *f=fopen("sortaret.in","r");
FILE *g=fopen("sortaret.out","w");

const int NMAX = 50005;
const int MMAX = 100005;

vector<int> v[NMAX];
stack<int> st;

bool viz[NMAX];

void DFS(int x)
{
    viz[x] = 1;
    for(int nod =0;nod<v[x].size();nod++)
    {
        int ve=v[x][nod];
        if(!viz[ve])
        {
            DFS(ve);
        }
    }
    st.push(x);
}

int main()
{
    int n, m, x, y, i, j;
    fscanf(f,"%d%d",&n,&m);

    for(i=1; i<=m; i++)
    {
        fscanf(f,"%d%d",&x,&y);
        v[x].push_back(y);
    }

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

    while(!st.empty())
    {
        fprintf(g,"%d ",st.top());
        st.pop();
    }

    fclose(f);
    fclose(g);
    return 0;
}