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authorHaidong Ji2020-05-16 23:36:25 -0500
committerHaidong Ji2020-05-16 23:36:25 -0500
commit1cf5ca9ec07e2c3c125f075c10b2ba713dbc7c7c (patch)
tree2cf0ee84c55e5bb6c4e5a8b38e6c3cd838ae6d81 /sources
parent6149e6ba6be2d253384d34196826b26c8287610b (diff)
Connected Components done!
Diffstat (limited to 'sources')
-rw-r--r--sources/connected_components.py33
1 files changed, 33 insertions, 0 deletions
diff --git a/sources/connected_components.py b/sources/connected_components.py
new file mode 100644
index 0000000..f09f7dc
--- /dev/null
+++ b/sources/connected_components.py
@@ -0,0 +1,33 @@
+# Uses python3
+
+import sys
+
+
+def explore(adj, visited, v):
+ visited.append(v)
+ for i in adj[v]:
+ if i not in visited:
+ explore(adj, visited, i)
+
+
+def number_of_components(adj):
+ visited = []
+ cc = 0
+ for v in range(len(adj)):
+ if v not in visited:
+ explore(adj, visited, v)
+ cc = cc + 1
+ return cc
+
+
+if __name__ == '__main__':
+ input = sys.stdin.read()
+ data = list(map(int, input.split()))
+ n, m = data[0:2]
+ data = data[2:]
+ edges = list(zip(data[0:(2 * m):2], data[1:(2 * m):2]))
+ adj = [[] for _ in range(n)]
+ for (a, b) in edges:
+ adj[a - 1].append(b - 1)
+ adj[b - 1].append(a - 1)
+ print(number_of_components(adj))