Pagini recente » Cod sursa (job #2430517) | Cod sursa (job #1656742) | Cod sursa (job #2018070) | Cod sursa (job #2151650) | Cod sursa (job #2595263)
#include <iostream>
#include <fstream>
#include <stdlib.h>
#include <queue>
#include <list>
#include <vector>
#define MAX_NODES 100011
using namespace std;
void addEdge(vector<int> list_gr[], int src, int dest) {
list_gr[src].push_back(dest);
}
void printGraph(vector<int> list_gr[], int vertices) {
for (int i = 1; i <= vertices; ++i) {
cout << "modul " << i << ":";
for (auto x : list_gr[i]) {
cout << " " << x;
}
printf("\n");
}
}
void bfs_graph(vector<int> list_gr[], int vertices, int src, int *visited, int *distance) {
queue <int> q;
int i, parent;
for (i = 1; i <= vertices; ++i) {
visited[i] = 0;
distance[i] = -1;
}
visited[src] = 1;
distance[src] = 0;
q.push(src);
while (!q.empty()) {
parent = q.front();
q.pop();
for (auto cnt : list_gr[parent]) {
if (visited[cnt] == 0) {
visited[cnt] = 1;
distance[cnt] = distance[parent] + 1;
q.push(cnt);
}
}
}
}
int main() {
ifstream fisin("bfs.in");
ofstream fisout("bfs.out");
int vertices, edges, S;
int sur, des;
fisin>> vertices >> edges >> S;
vector<int> list_gr[vertices+1];
int visited[vertices+1], distance[vertices+1];
for (int i = 0; i < vertices; ++i) {
fisin>> sur >> des;
addEdge(list_gr, sur, des);
}
for (i = 1; i <= vertices; i++) {
visited[i] = 0;
distance[i] = -1;
}
bfs_graph(list_gr, vertices, S, visited, distance);
for (int i = 1; i <= vertices; ++i) {
fisout << distance[i] << ' ';
}
fisout.close();
fisin.close();
return 0;
}