Модуль: BFS. Продвинутый курс

#include <iostream>
#include <vector>
#include <deque>
#include <vector>
#include <limits>

#define V 9 

using namespace std;

struct node
{
	int to, weight;
};

vector <node> edges[V];
void bfs_0_1(int start) {
	int INF = numeric_limits<int>::max();
	deque <int > Q;
	vector <int > dist(V, INF);
	dist[start] = 0;
	Q.push_back(start);
	while (!Q.empty()) {
		int u = Q.front();
		Q.pop_front();
		for (auto edge : edges[u]) {
			if (dist[edge.to] > dist[u] + edge.weight) {
				dist[edge.to] = dist[u] + edge.weight;
				if(edge.weight == 0 )
                                         Q.push_front(edge.to); 
                                 else
                                         Q.push_back(edge.to);
			}

		}
	}
	for (int i = 0; i < V; i++)
		cout << dist[i] << " ";
}

void addEdge(int u, int v, int wt)
{
	edges[u].push_back({ v, wt });
	edges[v].push_back({ u, wt });
}


int main()
{
	addEdge(0, 1, 0);
	// остальные ребра добавьте сами сами           

	bfs_0_1(0);
	return 0;
}