結果
| 問題 | No.2796 Small Matryoshka |
| ユーザー |
 vwxyz
|
| 提出日時 | 2024-06-28 21:52:54 |
| 言語 | Python3 (3.12.2 + numpy 1.26.4 + scipy 1.12.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 6,115 bytes |
| コンパイル時間 | 76 ms |
| コンパイル使用メモリ | 13,184 KB |
| 実行使用メモリ | 75,176 KB |
| 最終ジャッジ日時 | 2024-06-28 21:53:05 |
| 合計ジャッジ時間 | 4,824 ms |
|
ジャッジサーバーID （参考情報） |
judge4 / judge3 |
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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 | 30 ms
18,332 KB |
| testcase_01 | AC | 31 ms
11,392 KB |
| testcase_02 | AC | 31 ms
11,392 KB |
| testcase_03 | AC | 31 ms
11,264 KB |
| testcase_04 | WA | - |
| testcase_05 | AC | 647 ms
22,804 KB |
| testcase_06 | TLE | - |
| 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 | -- | - |
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=False):
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.le
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.le
L+=self.le
if R==None:
R=self.le*2
else:
assert 0<=R<=self.le
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.le
L+=self.le
if R==None:
R=self.le*2
else:
assert 0<=R<=self.le
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.le
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.le
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.le
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 Compress(lst):
decomp=sorted(list(set(lst)))
comp={x:i for i,x in enumerate(decomp)}
return comp,decomp
N=int(input())
A,B=[],[]
for i in range(N):
a,b=map(int,input().split())
A.append(a)
B.append(b)
comp,decomp=Compress(A+B+[0])
idx=sorted([i for i in range(N)],key=lambda i:B[i])
le=len(comp)
inf=1<<30
ST=Segment_Tree(le,max,-inf)
ST[0]=0
for i in idx:
a,b=comp[A[i]],comp[B[i]]
ST[b]=max(ST[b],ST.Fold(0,a+1)+1)
ans=N-ST.Fold()
print(ans)