結果
問題 | No.121 傾向と対策:門松列(その2) |
ユーザー | vwxyz |
提出日時 | 2024-12-19 13:39:17 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 3,829 ms / 5,000 ms |
コード長 | 6,288 bytes |
コンパイル時間 | 452 ms |
コンパイル使用メモリ | 82,420 KB |
実行使用メモリ | 312,100 KB |
最終ジャッジ日時 | 2024-12-19 13:39:33 |
合計ジャッジ時間 | 14,796 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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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 | 254 ms
94,076 KB |
testcase_01 | AC | 284 ms
107,836 KB |
testcase_02 | AC | 129 ms
78,112 KB |
testcase_03 | AC | 1,715 ms
258,596 KB |
testcase_04 | AC | 3,829 ms
312,100 KB |
testcase_05 | AC | 1,800 ms
258,164 KB |
testcase_06 | AC | 1,378 ms
270,348 KB |
testcase_07 | AC | 1,548 ms
270,616 KB |
testcase_08 | AC | 1,727 ms
258,436 KB |
ソースコード
from collections import defaultdict class Segment_Tree: def __init__(self,N,f,e,lst=None,dynamic=False,bisect_search=True): self.f=f self.e=e self.N=N self.bisect_search=bisect_search if self.bisect_search: self.le=1 while self.le<self.N: self.le*=2 else: self.le=self.N if dynamic: self.segment_tree=defaultdict(lambda:self.e) else: if lst==None: self.segment_tree=[self.e]*2*self.le else: assert len(lst)<=self.N self.segment_tree=[self.e]*self.le+[x for x in lst]+[self.e]*(self.le-len(lst)) for i in range(self.le-1,0,-1): self.segment_tree[i]=self.f(self.segment_tree[i<<1],self.segment_tree[i<<1|1]) def __getitem__(self,i): if type(i)==int: if -self.le<=i<0: return self.segment_tree[i+self.le*2] elif 0<=i<self.le: return self.segment_tree[i+self.le] else: raise IndexError("list index out of range") else: a,b,c=i.start,i.stop,i.step if a==None: a=self.le else: a+=self.le if b==None: b=self.le*2 else: b+=self.le return self.segment_tree[slice(a,b,c)] def __setitem__(self,i,x): if -self.le<=i<0: i+=self.le*2 elif 0<=i<self.le: i+=self.le else: raise IndexError("list index out of range") self.segment_tree[i]=x while i>1: i>>= 1 self.segment_tree[i]=self.f(self.segment_tree[i<<1],self.segment_tree[i<<1|1]) def Build(self,lst): for i,x in enumerate(lst,self.le): self.segment_tree[i]=x for i in range(self.le-1,0,-1): self.segment_tree[i]=self.f(self.segment_tree[i<<1],self.segment_tree[i<<1|1]) def Fold(self,L=None,R=None): if L==None: L=self.le else: assert 0<=L<=self.N L+=self.le if R==None: R=self.le*2 else: assert 0<=R<=self.N R+=self.le vL=self.e vR=self.e while L<R: if L&1: vL=self.f(vL,self.segment_tree[L]) L+=1 if R&1: R-=1 vR=self.f(self.segment_tree[R],vR) L>>=1 R>>=1 return self.f(vL,vR) def Fold_Index(self,L=None,R=None): if L==None: L=self.le else: assert 0<=L<=self.N L+=self.le if R==None: R=self.le*2 else: assert 0<=R<=self.N R+=self.le if L==R: return None x=self.Fold(L-self.le,R-self.le) while L<R: if L&1: if self.segment_tree[L]==x: i=L break L+=1 if R&1: R-=1 if self.segment_tree[R]==x: i=R break L>>=1 R>>=1 while i<self.le: if self.segment_tree[i]==self.segment_tree[i<<1]: i<<=1 else: i<<=1 i|=1 i-=self.le return i def Bisect_Right(self,L=None,f=None): assert self.bisect_search if L==self.le: return self.le if L==None: L=0 assert 0<=L<=self.N L+=self.le vl=self.e vr=self.e l,r=L,self.le*2 while l<r: if l&1: vl=self.f(vl,self.segment_tree[l]) l+=1 if r&1: r-=1 vr=self.f(self.segment_tree[r],vr) l>>=1 r>>=1 if f(self.f(vl,vr)): return self.N v=self.e while True: while L%2==0: L>>=1 vv=self.f(v,self.segment_tree[L]) if f(vv): v=vv L+=1 else: while L<self.le: L<<=1 vv=self.f(v,self.segment_tree[L]) if f(vv): v=vv L+=1 return L-self.le def Bisect_Left(self,R=None,f=None): assert self.bisect_search if R==0: return 0 if R==None: R=self.le assert 0<=R<=self.N R+=self.le vl=self.e vr=self.e l,r=self.le,R while l<r: if l&1: vl=self.f(vl,self.segment_tree[l]) l+=1 if r&1: r-=1 vr=self.f(self.segment_tree[r],vr) l>>=1 r>>=1 if f(self.f(vl,vr)): return 0 v=self.e while True: R-=1 while R>1 and R%2: R>>=1 vv=self.f(self.segment_tree[R],v) if f(vv): v=vv else: while R<self.le: R=2*R+1 vv=self.f(self.segment_tree[R],v) if f(vv): v=vv R-=1 return R+1-self.le def __str__(self): return "["+", ".join(map(str,[self.segment_tree[i] for i in range(self.le,self.le+self.N)]))+"]" def __repr__(self): return "Segment_Tree("+str(self)+")" def Compress(lst): decomp=sorted(list(set(lst))) comp={x:i for i,x in enumerate(decomp)} return comp,decomp N=int(input()) A=list(map(int,input().split())) comp,decomp=Compress(A) for i in range(N): A[i]=comp[A[i]] L=Segment_Tree(N,lambda x,y:x+y,0) R=Segment_Tree(N,lambda x,y:x+y,0) LR=[0]*N sum_LR=0 ans=0 for a in A: R[a]+=1 for i in range(N): a=A[i] LR[a]-=L[a] sum_LR-=L[a] R[a]-=1 l0=L.Fold(0,a) l1=i-l0-L[a] r0=R.Fold(0,a) r1=N-i-1-r0-R[a] ans+=l0*r0+l1*r1-(sum_LR-LR[a]) LR[a]+=R[a] sum_LR+=R[a] L[a]+=1 print(ans)