結果
| 問題 |
No.160 最短経路のうち辞書順最小
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2024-03-21 16:14:33 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
AC
|
| 実行時間 | 160 ms / 5,000 ms |
| コード長 | 1,909 bytes |
| コンパイル時間 | 237 ms |
| コンパイル使用メモリ | 82,048 KB |
| 実行使用メモリ | 83,072 KB |
| 最終ジャッジ日時 | 2024-09-30 10:09:26 |
| 合計ジャッジ時間 | 5,088 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 26 |
ソースコード
import sys
import math
import bisect
from heapq import heapify, heappop, heappush
from collections import deque, defaultdict, Counter
from functools import lru_cache
from itertools import accumulate, combinations, permutations, product
sys.setrecursionlimit(1000000)
MOD = 10 ** 9 + 7
MOD99 = 998244353
input = lambda: sys.stdin.readline().strip()
NI = lambda: int(input())
NMI = lambda: map(int, input().split())
NLI = lambda: list(NMI())
SI = lambda: input()
SMI = lambda: input().split()
SLI = lambda: list(SMI())
EI = lambda m: [NLI() for _ in range(m)]
def adjlist(n, edges, directed=False, in_origin=1):
if len(edges) == 0:
return [[] for _ in range(n)]
weighted = True if len(edges[0]) > 2 else False
if in_origin == 1:
if weighted:
edges = [[x-1, y-1, w] for x, y, w in edges]
else:
edges = [[x-1, y-1] for x, y in edges]
res = [[] for _ in range(n)]
if weighted:
for u, v, c in edges:
res[u].append([v, c])
if not directed:
res[v].append([u, c])
else:
for u, v in edges:
res[u].append(v)
if not directed:
res[v].append(u)
return res
def main():
N, M, S, G = NMI()
ABC = EI(M)
Graph = adjlist(N, ABC, in_origin=0)
INF = 10**10
D = [[INF]*N for _ in range(N)]
for i in range(N):
D[i][i] = 0
for a, b, c in ABC:
D[a][b] = c
D[b][a] = c
for k in range(N):
for i in range(N):
for j in range(N):
D[i][j] = min(D[i][j], D[i][k] + D[k][j])
total = D[S][G]
ans = [S]
while ans[-1] != G:
now = ans[-1]
for b, c in sorted(Graph[now]):
if c + D[b][G] == total:
total -= c
ans.append(b)
break
print(*ans)
if __name__ == "__main__":
main()