結果
| 問題 |
No.1320 Two Type Min Cost Cycle
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2020-12-02 20:59:04 |
| 言語 | Python3 (3.13.1 + numpy 2.2.1 + scipy 1.14.1) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 2,441 bytes |
| コンパイル時間 | 132 ms |
| コンパイル使用メモリ | 12,672 KB |
| 実行使用メモリ | 18,336 KB |
| 最終ジャッジ日時 | 2024-09-20 01:20:20 |
| 合計ジャッジ時間 | 5,343 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 6 TLE * 1 -- * 50 |
ソースコード
#!/usr/bin/env python3
import sys
import heapq
input = sys.stdin.readline
inf = 1e15
def solve_undirected_graph():
N,M = map(int,input().split())
edges = [[] for i in range(N)]
for i in range(M):
u,v,w = map(int,input().split())
u-=1
v-=1
edges[u].append((v,w))
edges[v].append((u,w))
ans = inf
for root in range(N):
dist = [inf for i in range(N)]
label = [-1 for i in range(N)]
q = [(0,root)]
dist[root] = 0
label[root] = root
while len(q) > 0:
cost,from_node = heapq.heappop(q)
if cost > dist[from_node]:
continue
for to_node,w in edges[from_node]:
if dist[to_node] > cost + w:
dist[to_node] = cost + w
if from_node == root:
label[to_node] = to_node
else :
label[to_node] = label[from_node]
heapq.heappush(q,(cost+w,to_node))
for from_node in range(N):
for to_node,w in edges[from_node]:
if from_node == root or to_node == root:
continue
if label[from_node] == label[to_node]:
continue
if ans > dist[from_node] + dist[to_node] + w:
ans = dist[from_node] + dist[to_node] + w
return ans
def solve_directed_graph():
N,M = map(int,input().split())
edges = [[] for i in range(N)]
for i in range(M):
u,v,w = map(int,input().split())
u-=1
v-=1
edges[u].append((v,w))
ans = inf
for root in range(N):
dist = [inf for i in range(N)]
q = [(0,root)]
dist[root] = 0
while len(q) > 0:
cost,from_node = heapq.heappop(q)
if cost > dist[from_node]:
continue
for to_node,w in edges[from_node]:
if dist[to_node] > cost + w:
dist[to_node] = cost + w
heapq.heappush(q,(cost+w,to_node))
if to_node == root and ans > dist[from_node] + w:
ans = dist[from_node] + w
return ans
def main():
T = int(input())
ans = inf
if T == 0:
ans = solve_undirected_graph()
else:
ans = solve_directed_graph()
if ans == inf:
ans = -1
print(ans)
main()