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#include <iostream>
#include<fstream>
#include<vector>
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
vector<int> graph[100005];
int viz[100005];
void DFS(int node)
{
viz[node]=1;
int lim=graph[node].size();
for(int i=0;i<lim;i++)
{
int vecin=graph[node][i];
if(!viz[vecin])
DFS(vecin);
}
g<<node<<" ";
}
int main()
{
int m,n,x,y,i;
f>>n>>m;
for(i=1;i<=m;i++)
{
f>>x>>y;
graph[y].push_back(x);
}
for(i=1;i<=n;i++)
{
if(!viz[i])
DFS(i);
}
return 0;
}