Last active
June 6, 2019 00:04
-
-
Save JRobsonJr/8cd70054e75afd4a121d415611cca250 to your computer and use it in GitHub Desktop.
Questões do URI.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
# Itinerário do Papai Noel | |
class UnionFind: | |
def __init__(self, n): | |
self.parent = [i for i in xrange(n)] | |
def find(self, elem): | |
if self.parent[elem] != elem: | |
self.parent[elem] = self.find(self.parent[elem]) | |
return self.parent[elem] | |
def union(self, elem1, elem2): | |
p1 = self.find(elem1) | |
p2 = self.find(elem2) | |
if p1 != p2: | |
self.parent[p2] = p1 | |
def connected(self, elem1, elem2): | |
return self.find(elem1) == self.find(elem2) | |
while True: | |
m, n = map(int, raw_input().split()) | |
if m == n == 0: | |
break | |
edges = [] | |
for i in xrange(n): | |
cid1, cid2, dist = map(int, raw_input().split()) | |
edges.append((cid1, cid2, dist)) | |
edges = sorted(edges, key=lambda e: e[2], reverse=True) | |
uf = UnionFind(m) | |
total = 0 | |
while edges: | |
cid1, cid2, dist = edges.pop() | |
if not uf.connected(cid1, cid2): | |
uf.union(cid1, cid2) | |
total += dist | |
print total | |
# Estradas Escuras | |
class UnionFind: | |
def __init__(self, n): | |
self.parent = [i for i in xrange(n)] | |
def find(self, elem): | |
if self.parent[elem] != elem: | |
self.parent[elem] = self.find(self.parent[elem]) | |
return self.parent[elem] | |
def union(self, elem1, elem2): | |
p1 = self.find(elem1) | |
p2 = self.find(elem2) | |
if p1 != p2: | |
self.parent[p2] = p1 | |
def connected(self, elem1, elem2): | |
return self.find(elem1) == self.find(elem2) | |
while True: | |
m, n = map(int, raw_input().split()) | |
if m == n == 0: | |
break | |
edges = [] | |
for i in xrange(n): | |
cid1, cid2, dist = map(int, raw_input().split()) | |
edges.append((cid1, cid2, dist)) | |
edges = sorted(edges, key=lambda e: e[2], reverse=True) | |
uf = UnionFind(m) | |
saved = 0 | |
while edges: | |
cid1, cid2, dist = edges.pop() | |
if not uf.connected(cid1, cid2): | |
uf.union(cid1, cid2) | |
else: | |
saved += dist | |
print saved | |
# Copa do Mundo | |
class UnionFind: | |
def __init__(self, n): | |
self.parent = [i for i in xrange(n)] | |
def find(self, elem): | |
if self.parent[elem] != elem: | |
self.parent[elem] = self.find(self.parent[elem]) | |
return self.parent[elem] | |
def union(self, elem1, elem2): | |
p1 = self.find(elem1) | |
p2 = self.find(elem2) | |
if p1 != p2: | |
self.parent[p2] = p1 | |
def connected(self, elem1, elem2): | |
return self.find(elem1) == self.find(elem2) | |
n, f, r = map(int, raw_input().split()) | |
ferrovias = [] | |
for i in xrange(f): | |
cid1, cid2, dist = map(int, raw_input().split()) | |
ferrovias.append((cid1 - 1, cid2 - 1, dist)) | |
rodovias = [] | |
for i in xrange(r): | |
cid1, cid2, dist = map(int, raw_input().split()) | |
rodovias.append((cid1 - 1, cid2 - 1, dist)) | |
ferrovias = sorted(ferrovias, key=lambda e: e[2], reverse=True) | |
rodovias = sorted(rodovias, key=lambda e: e[2], reverse=True) | |
uf = UnionFind(n) | |
custo = 0 | |
while ferrovias: | |
cid1, cid2, dist = ferrovias.pop() | |
if not uf.connected(cid1, cid2): | |
uf.union(cid1, cid2) | |
custo += dist | |
while rodovias: | |
cid1, cid2, dist = rodovias.pop() | |
if not uf.connected(cid1, cid2): | |
uf.union(cid1, cid2) | |
custo += dist | |
print custo | |
# Reduzindo Detalhes em um Mapa | |
class UnionFind: | |
def __init__(self, n): | |
self.parent = [i for i in xrange(n)] | |
def find(self, elem): | |
if self.parent[elem] != elem: | |
self.parent[elem] = self.find(self.parent[elem]) | |
return self.parent[elem] | |
def union(self, elem1, elem2): | |
p1 = self.find(elem1) | |
p2 = self.find(elem2) | |
if p1 != p2: | |
self.parent[p2] = p1 | |
def connected(self, elem1, elem2): | |
return self.find(elem1) == self.find(elem2) | |
n, m = map(int, raw_input().split()) | |
edges = [] | |
for i in xrange(m): | |
cid1, cid2, dist = map(int, raw_input().split()) | |
edges.append((cid1 - 1, cid2 - 1, dist)) | |
edges = sorted(edges, key=lambda e: e[2], reverse=True) | |
uf = UnionFind(n) | |
total = 0 | |
while edges: | |
cid1, cid2, dist = edges.pop() | |
if not uf.connected(cid1, cid2): | |
uf.union(cid1, cid2) | |
total += dist | |
print total |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment