結果
問題 | No.1812 Uribo Road |
ユーザー | MasKoaTS |
提出日時 | 2021-11-16 12:40:16 |
言語 | PyPy3 (7.3.15) |
結果 |
TLE
|
実行時間 | - |
コード長 | 1,609 bytes |
コンパイル時間 | 227 ms |
コンパイル使用メモリ | 82,132 KB |
実行使用メモリ | 175,896 KB |
最終ジャッジ日時 | 2024-07-07 09:28:17 |
合計ジャッジ時間 | 7,072 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 43 ms
53,468 KB |
testcase_01 | AC | 44 ms
53,632 KB |
testcase_02 | AC | 106 ms
76,672 KB |
testcase_03 | TLE | - |
testcase_04 | -- | - |
testcase_05 | -- | - |
testcase_06 | -- | - |
testcase_07 | -- | - |
testcase_08 | -- | - |
testcase_09 | -- | - |
testcase_10 | -- | - |
testcase_11 | -- | - |
testcase_12 | -- | - |
testcase_13 | -- | - |
testcase_14 | -- | - |
testcase_15 | -- | - |
testcase_16 | -- | - |
testcase_17 | -- | - |
testcase_18 | -- | - |
testcase_19 | -- | - |
testcase_20 | -- | - |
testcase_21 | -- | - |
testcase_22 | -- | - |
testcase_23 | -- | - |
testcase_24 | -- | - |
testcase_25 | -- | - |
testcase_26 | -- | - |
testcase_27 | -- | - |
testcase_28 | -- | - |
testcase_29 | -- | - |
testcase_30 | -- | - |
testcase_31 | -- | - |
testcase_32 | -- | - |
testcase_33 | -- | - |
ソースコード
#ダイクストラ高速化弱め import itertools import heapq INF = float("inf") N,M,K = map(int,input().split()) R = set([i-1 for i in map(int,input().split())]) lR = list(R) route = [[] for _ in [0]*N] edge = [0]*M st = set([0,N-1]) for i in range(M): A,B,C = map(int,input().split()) A -= 1; B -= 1 if(i in R): edge[i] = [A,B,C] st.add(A); st.add(B) route[A].append((B,C)) route[B].append((A,C)) def dijkstra(route,start,finish,n): path = [-1]*n q = [(0,start)] while(q): d,v = heapq.heappop(q) if(path[v] == -1): path[v] = d if(v == finish): break for nv,dist in route[v]: heapq.heappush(q,(d+dist,nv)) return path[finish] ans = INF rsum = sum(edge[i][2] for i in R) dist = [[0]*N for _ in [0]*N] for rbit in range(1 << K): b = [(rbit >> i) & 1 for i in range(K)] dp = [[INF]*K for i in range(1 << K)] for i in range(K): p = edge[lR[i]][b[i]] if(dist[0][p] == 0): dist[0][p] = dist[p][0] = dijkstra(route,0,p,N) dp[1 << i][i] = dist[0][p] + rsum for bit in range(1, 1 << K): for s in range(K): p = edge[lR[s]][b[s]^1] if not(bit & (1 << s)): continue for t in range(K): np = edge[lR[t]][b[t]] k = bit | (1 << t) if(dist[p][np] == 0): dist[p][np] = dist[np][p] = dijkstra(route,p,np,N) d = dp[bit][s] + dist[p][np] if((bit & (1 << t)) == 0 and dp[k][t] > d): dp[k][t] = d c = INF for i in range(K): p = edge[lR[i]][b[i]^1] if(dist[p][N-1] == 0): dist[p][N-1] = dist[N-1][p] = dijkstra(route,p,N-1,N) d = dp[-1][i] + dist[p][N-1] if(c > d): c = d if(ans > c): ans = c print(ans)