diff --git a/Graphs/Breadth_First_Search.py b/Graphs/Breadth_First_Search.py new file mode 100644 index 000000000000..f3d9fd778f77 --- /dev/null +++ b/Graphs/Breadth_First_Search.py @@ -0,0 +1,45 @@ +class Graph: + + def __init__(self, vertex): + self.vertex = vertex + self.graph = [[0] * vertex for i in range(vertex) ] + + def add_edge(self, u, v): + self.graph[u - 1][v - 1] = 1 + self.graph[v - 1][u - 1] = 1 + + def show(self): + + for i in self.graph: + for j in i: + print(j, end=' ') + print(' ') + def bfs(self,v): + + visited = [False]*self.vertex + visited[v - 1] = True + print('%d visited' % (v)) + + queue = [v - 1] + while len(queue) > 0: + v = queue[0] + for u in range(self.vertex): + if self.graph[v][u] == 1: + if visited[u]== False: + visited[u] = True + queue.append(u) + print('%d visited' % (u +1)) + queue.pop(0) + +g = Graph(10) + +g.add_edge(1,2) +g.add_edge(1,3) +g.add_edge(1,4) +g.add_edge(2,5) +g.add_edge(3,6) +g.add_edge(3,7) +g.add_edge(4,8) +g.add_edge(5,9) +g.add_edge(6,10) +g.bfs(1) diff --git a/Graphs/Deep_First_Search.py b/Graphs/Deep_First_Search.py index d346010033e1..51c0eb6b8b46 100644 --- a/Graphs/Deep_First_Search.py +++ b/Graphs/Deep_First_Search.py @@ -8,7 +8,6 @@ def __init__(self, vertex): def add_edge(self, u, v): self.graph[u - 1][v - 1] = 1 self.graph[v - 1][u - 1] = 1 - def show(self): for i in self.graph: @@ -26,10 +25,9 @@ def dfs(self, u): g = Graph(5) - g.add_edge(1,4) g.add_edge(4,2) g.add_edge(4,5) g.add_edge(2,5) g.add_edge(5,3) -print(g.dfs(1)) +g.dfs(1)