Problem:
Score : 500 points

Problem Statement

There is a rooted tree (see Notes) with N vertices numbered 1 to N.
Each of the vertices, except the root, has a directed edge coming from its parent.
Note that the root may not be Vertex 1.

Takahashi has added M new directed edges to this graph.
Each of these M edges, u \rightarrow v, extends from some vertex u to its descendant v.

You are given the directed graph with N vertices and N-1+M edges after Takahashi added edges.
More specifically, you are given N-1+M pairs of integers, (A_1, B_1), ..., (A_{N-1+M}, B_{N-1+M}), which represent that the i-th edge extends from Vertex A_i to Vertex B_i.

Restore the original rooted tree.

Notes

For "tree" and other related terms in graph theory, see the article in Wikipedia, for example.

Constraints

3 \leq N

1 \leq M

N + M \leq 10^5

1 \leq A_i, B_i \leq N

A_i \neq B_i

If i \neq j, (A_i, B_i) \neq (A_j, B_j).

The graph in input can be obtained by adding M edges satisfying the condition in the problem statement to a rooted tree with N vertices.

Input

Input is given from Standard Input in the following format:

N M
A_1 B_1
:
A_{N-1+M} B_{N-1+M}

Output

Print N lines.
In the i-th line, print 0 if Vertex i is the root of the original tree, and otherwise print the integer representing the parent of Vertex i in the original tree.

Note that it can be shown that the original tree is uniquely determined.

Sample Input 1

3 1
1 2
1 3
2 3

Sample Output 1

0
1
2

The graph in this input is shown below:

It can be seen that this graph is obtained by adding the edge 1 \rightarrow 3 to the rooted tree 1 \rightarrow 2 \rightarrow 3.

Sample Input 2

6 3
2 1
2 3
4 1
4 2
6 1
2 6
4 6
6 5

Sample Output 2

6
4
2
0
6
2

Solution in C++14 (GCC 5.4.1) (judge verdict: Accepted)

#include<bits/stdc++.h>
using namespace std;
const int N=1e5+10;
int n,m;
int inde[N],awa[N]; 
vector<int>E[N];
int main()
{
	cin>>n>>m;
	for(int i=0;i<n+m-1;i++)
	{
		int x,y; cin>>x>>y;
		x--; y--;
		E[x].push_back(y);
		inde[y]++; 
	} 
	queue<int>qaq;
	for(int i=0;i<n;i++)
		if(!inde[i])
		{
			awa[i+1]=0;
			qaq.push(i);
		}
	while(!qaq.empty())
	{
		int u=qaq.front();
		qaq.pop();
		for(int i=0;i<E[u].size();i++)
		{
			int uu=E[u][i];
			inde[uu]--;
			if(!inde[uu])
			{
				awa[uu+1]=u+1;
				qaq.push(uu);
			}
		}
	}
	for(int i=1;i<=n;i++)
		cout<<awa[i]<<endl;
	return 0;
}