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Cod sursa(job #917377)
#include<iostream>
#include<vector>
#include<fstream>
#include<queue>
using namespace std;
vector <int> g[10001];
int grad[10001];
queue <int> q;
int main()
{
int m, n, i, a, b, j;
ifstream f("sortaret.in");
ofstream out("sortaret.out");
f>>n;
f>>m;
for(i=0;i<m;i++)
{
f>>a>>b;
g[a].push_back(b);
grad[b]++;
}
for(i=0;i<n;i++)
if(grad[i]==0)
q.push(i);
for(i=0;i<n;i++)
{
for(j=0; j<n; j++)
{
grad[j]--;
if(grad[j]==0)
q.push(j);
}
out<<q.front()<<" ";
q.pop();
}
return 0;
}