Submission #7468980

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Source Code Expand

import sys
def input():
	return sys.stdin.readline().strip()

N, Q = list(map(int, input().split()))
union = [i for i in range(N)]
level = [0 for i in range(N)]

def root(union, i, mode=0):
	keiro = [i]
	ans = i
	while ans != union[ans]:
		ans = union[ans]
		keiro.append(ans)
	if mode == 0:
		return ans
	else:
		return ans, keiro

def unite(union, i, j, level):
	root_i, list_i = root(union, i, 1)
	root_j, list_j = root(union, j, 1)
	if root_i != root_j:
		if level[i] < level[j]:
			level[j] = max(level[i] + 1, level[j])
			for node in list_i:
				union[node] = root_j
		else:
			level[i] = max(level[j] + 1, level[i])
			for node in list_j:
				union[node] = root_i

for q in range(Q):
	P, A, B = list(map(int, input().split()))
	A -= 1
	B -= 1
	if P == 0:
		unite(union, A, B, level)
	else:
		if root(union, A) == root(union, B):
			print("Yes")
		else:
			print("No")

Submission Info

Judge Result