結果
| 問題 |
No.1480 Many Complete Graphs
|
| コンテスト | |
| ユーザー |
gew1fw
|
| 提出日時 | 2025-06-12 16:12:07 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 1,867 bytes |
| コンパイル時間 | 231 ms |
| コンパイル使用メモリ | 82,636 KB |
| 実行使用メモリ | 106,676 KB |
| 最終ジャッジ日時 | 2025-06-12 16:12:31 |
| 合計ジャッジ時間 | 13,288 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 42 WA * 15 |
ソースコード
import heapq
from collections import defaultdict
def main():
import sys
input = sys.stdin.read
data = input().split()
ptr = 0
N = int(data[ptr])
ptr += 1
M = int(data[ptr])
ptr += 1
s1_list = [[] for _ in range(N + 1)] # s1_list[u] contains (s1, c_i) for each subset including u
s1_map = defaultdict(list) # s1_map[s1] contains (c_i, others) for each subset where s1 is the smallest
for _ in range(M):
k_i = int(data[ptr])
ptr += 1
c_i = int(data[ptr])
ptr += 1
s_list = list(map(int, data[ptr:ptr + k_i]))
ptr += k_i
s_1 = s_list[0]
others = s_list[1:]
s1_map[s_1].append((c_i, others))
for u in s_list:
s1_list[u].append((s_1, c_i))
# Dijkstra's algorithm setup
INF = float('inf')
distance = [INF] * (N + 1)
distance[1] = 0
heap = []
heapq.heappush(heap, (0, 1))
visited = [False] * (N + 1)
while heap:
dist_u, u = heapq.heappop(heap)
if visited[u]:
continue
visited[u] = True
if u == N:
print(dist_u)
return
# Process all subsets where u is the smallest (s_1)
for c_i, others in s1_map.get(u, []):
for v in others:
w = (u + v + 1) // 2 + c_i
if distance[v] > dist_u + w:
distance[v] = dist_u + w
heapq.heappush(heap, (distance[v], v))
# Process all (s1, c_i) in s1_list[u]
for s1, c_i in s1_list[u]:
if s1 != u:
w = (u + s1 + 1) // 2 + c_i
if distance[s1] > dist_u + w:
distance[s1] = dist_u + w
heapq.heappush(heap, (distance[s1], s1))
# If N was not reached
print(-1)
if __name__ == "__main__":
main()
gew1fw