init

1B.py

@@ -0,0 +1,24 @@
+V, E = map(int, input().split())
+adj = [[] for i in range(V + 1)]
+for i in range(E):
+    u, v = map(int, input().split())
+    adj[u].append(v)
+    adj[v].append(u)
+visited = [False] * (V + 1)
+ans = []
+for i in range(1, V + 1):
+    if not visited[i]:
+        comp = []
+        stack = [i]
+        visited[i] = True
+        while stack:
+            u = stack.pop()
+            comp.append(u)
+            for v in adj[u]:
+                if not visited[v]:
+                    visited[v] = True
+                    stack.append(v)
+        ans.append(comp)
+print(len(ans) - 1)
+for i in range(len(ans) - 1):
+    print(ans[i][0], ans[i+1][0])