mirror of
https://github.com/TheAlgorithms/Python.git
synced 2024-11-24 13:31:07 +00:00
49 lines
1.1 KiB
Python
49 lines
1.1 KiB
Python
from __future__ import print_function
|
|
|
|
def printDist(dist, V):
|
|
print("\nThe shortest path matrix using Floyd Warshall algorithm\n")
|
|
for i in range(V):
|
|
for j in range(V):
|
|
if dist[i][j] != float('inf') :
|
|
print(int(dist[i][j]),end = "\t")
|
|
else:
|
|
print("INF",end="\t")
|
|
print()
|
|
|
|
|
|
|
|
def FloydWarshall(graph, V):
|
|
dist=[[float('inf') for i in range(V)] for j in range(V)]
|
|
|
|
for i in range(V):
|
|
for j in range(V):
|
|
dist[i][j] = graph[i][j]
|
|
|
|
for k in range(V):
|
|
for i in range(V):
|
|
for j in range(V):
|
|
if dist[i][k]!=float('inf') and dist[k][j]!=float('inf') and dist[i][k]+dist[k][j] < dist[i][j]:
|
|
dist[i][j] = dist[i][k] + dist[k][j]
|
|
|
|
printDist(dist, V)
|
|
|
|
|
|
|
|
#MAIN
|
|
V = int(input("Enter number of vertices: "))
|
|
E = int(input("Enter number of edges: "))
|
|
|
|
graph = [[float('inf') for i in range(V)] for j in range(V)]
|
|
|
|
for i in range(V):
|
|
graph[i][i] = 0.0
|
|
|
|
for i in range(E):
|
|
print("\nEdge ",i+1)
|
|
src = int(input("Enter source:"))
|
|
dst = int(input("Enter destination:"))
|
|
weight = float(input("Enter weight:"))
|
|
graph[src][dst] = weight
|
|
|
|
FloydWarshall(graph, V)
|