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#include <bits/stdc++.h>
#define M 50000
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
int n,m,sortare[M],i,j,x,y,t;
vector<int> v[M];
bool viz[M];
void dfs(int nod)
{ viz[nod]=1;
sortare[++t]=nod;
for(int i=0;i<v[nod].size();i++)
if(viz[v[nod][i]]==0)
{ viz[v[nod][i]]=1;
dfs(v[nod][i]);
}
}
int main()
{ f>>n>>m;
for(i=1;i<=m;i++)
{ f>>x>>y;
v[x].push_back(y);
}
for(i=1;i<=n;i++)
if(viz[i]==0)
dfs(i);
for(i=1;i<=t;i++)
g<<sortare[i]<<" ";
return 0;
}