This documentation is automatically generated by online-judge-tools/verification-helper
# verification-helper: PROBLEM https://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=GRL_2_A
from pathlib import Path
import sys
sys.path.append(str(Path(__file__).resolve().parent.parent.parent.parent))
class UnionFind:
def __init__(self, n):
self.n = n
self.par = [-1] * n
self.group_ = n
def find(self, x):
if self.par[x] < 0:
return x
lst = []
while self.par[x] >= 0:
lst.append(x)
x = self.par[x]
for y in lst:
self.par[y] = x
return x
def unite(self, x, y):
x = self.find(x)
y = self.find(y)
if x == y:
return False
if self.par[x] > self.par[y]:
x, y = y, x
self.par[x] += self.par[y]
self.par[y] = x
self.group_ -= 1
return True
def size(self, x):
return -self.par[self.find(x)]
def same(self, x, y):
return self.find(x) == self.find(y)
@property
def group(self):
return self.group_
def Kruskal(n, edges, is_sorted=False):
if n == 1:
return 0
if not is_sorted:
edges.sort(key=lambda x: x[2])
UF = UnionFind(n)
res = 0
for u, v, cost in edges:
if UF.unite(u, v):
res += cost
if UF.group == 1:
return res
return -1
n, m = map(int, input().split())
edges = [list(map(int, input().split())) for _ in range(m)]
print(Kruskal(n, edges))Traceback (most recent call last):
File "/opt/hostedtoolcache/Python/3.11.4/x64/lib/python3.11/site-packages/onlinejudge_verify/documentation/build.py", line 81, in _render_source_code_stat
bundled_code = language.bundle(
^^^^^^^^^^^^^^^^
File "/opt/hostedtoolcache/Python/3.11.4/x64/lib/python3.11/site-packages/onlinejudge_verify/languages/python.py", line 108, in bundle
raise NotImplementedError
NotImplementedError