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#include<iostream>
#include<fstream>
using namespace std;
int N,M, a[5000][50000],viz[50000],nrc,lista[50000],cont=1;
void dfs(int nod)
{
viz[nod]=1;
lista[cont++]=nod;
for(int i=1; i<=N; i++)
if(viz[i]!=1 && a[nod][i]!=0)
dfs(i);
}
int main()
{
int i,x,y;
ifstream f("sortaret.in");
f>>N>>M;
for(i=1; i<=M; i++)
{
f>>x>>y;
a[x][y]=1;
}
f.close();
for(i=1; i<=N; i++)
if(!viz[i])
{
nrc++;
dfs(i);
}
ofstream g("sortaret.out");
for(i=1; i<=N; i++)
g<<lista[i]<<" ";
g.close();
return 0;
}