結果
| 問題 | No.1545 [Cherry 2nd Tune N] Anthem |
| コンテスト | |
| ユーザー |
👑 Kazun
|
| 提出日時 | 2021-05-20 00:32:04 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
AC
|
| 実行時間 | 1,058 ms / 3,000 ms |
| コード長 | 2,570 bytes |
| 記録 | |
| コンパイル時間 | 447 ms |
| コンパイル使用メモリ | 82,376 KB |
| 実行使用メモリ | 198,864 KB |
| 最終ジャッジ日時 | 2024-12-14 21:37:26 |
| 合計ジャッジ時間 | 22,888 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 67 |
ソースコード
class Heap_Point:
def __init__(self,x,d):
self.d=d
self.x=x
def __str__(self):
return "(point:{}, dist:{})".format(self.x,self.d)
def __repr__(self):
return str(self)
def __lt__(self,other):
return self.d<other.d
def __iter__(self):
yield from (self.x,self.d)
#================================================
import sys
from heapq import heapify,heappop,heappush
input=sys.stdin.readline
N,S,T,K=map(int,input().split())
X=["*"]+list(map(int,input().split()))
M=int(input())
E=[[] for _ in range(N+1)]
A=[]; B=[]; Y=[]
for _ in range(M):
a,b,y=map(int,input().split())
E[a].append((b,y))
A.append(a)
B.append(b)
Y.append(y)
#==================================================
#Validator
assert 1<=N<=10**5,"Nが制約違反 (N={})".format(N)
assert 1<=S<=N,"Sが制約違反 (S={}, N={})".format(S,N)
assert 1<=T<=N,"Tが制約違反 (T={}, N={})".format(T,N)
assert 1<=K<=3*10**4,"Kが制約違反 (K={})".format(K)
assert 1<=M<=min(N*N,2*10**5),"M が制約違反 (M={}, N^2={})".format(M,N*N)
for i in range(M):
assert 1<=A[i]<=N, "A_{}が制約違反 (A_{}={})".format(i+1,i+1,A[i])
assert 1<=B[i]<=N, "B_{}が制約違反 (B_{}={})".format(i+1,i+1,B[i])
assert len(set([(a,b) for a,b in zip(A,B)]))==M,"(A,B) に重複あり"
for i in range(M):
assert 1<=Y[i]<=10**9,"Y_{}が制約違反 (Y_{}={})".format(i+1,i+1,Y[i])
Type_A=(1<=N<=10**5) and (1<=K<=10)
Type_B=(1<=N<=130) and (1<=K<=130)
Type_C=(1<=N<=10) and (1<=K<=3*10**4)
print("[A]: {}".format(Type_A),file=sys.stderr)
print("[B]: {}".format(Type_B),file=sys.stderr)
print("[C]: {}".format(Type_C),file=sys.stderr)
assert Type_A or Type_B or Type_C,"[A],[B],[C] のいずれも満たさない (N={}, K={})".format(N,K)
#==================================================
inf=float("inf")
DP=[[inf]*(K+1) for _ in range(N+1)]
DP[S][1]=X[S]
Reverse=[[(0,0) for _ in range(K+1)] for _ in range(N+1)]
Q=[Heap_Point((S,1),0)]
heapify(Q)
while Q:
(x,k),d=heappop(Q)
if DP[x][k]<d:
continue
if x==T and k==K:
break
l=min(k+1,K)
for y,m in E[x]:
if DP[x][k]+m+X[y]<DP[y][l]:
DP[y][l]=DP[x][k]+m+X[y]
Reverse[y][l]=(x,k)
heappush(Q,Heap_Point((y,l),DP[y][l]))
V=DP[T][K]
if V<inf:
x,k=T,K
P=[]
while k>0:
P.append(x)
x,k=Reverse[x][k]
print("Possible")
print(V)
print(len(P))
print(*P[::-1])
else:
print("Impossible")
Kazun