#include <iostream>
#include <stdio.h>
#include <vector>

using namespace std;

vector<int> g[50001];
int n,m;using namespace std;

int mark[50001];
int v[50001];
int t;

void dfs(int k){
    unsigned int i;
    mark[k]=1;
    for(i=0;i<g[k].size();i++){
        if(mark[g[k][i]]==0){
            dfs(g[k][i]);
        }
    }
    v[t++]=k;
}

int main(){
    int i;
    int x,y,j;

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

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

    for(i=0;i<m;i++){
        scanf("%d%d",&x,&y);
        g[x].push_back(y);
    }

    for(i=1;i<=n;i++){
        if(mark[i]==0){
            dfs(i);
        }
    }
    for(j=t-1;j>=0;j--){
        printf("%d ",v[j]);
    }
    return 0;
}