結果
| 問題 |
No.2950 Max Min Product
|
| コンテスト | |
| ユーザー |
sasa8uyauya
|
| 提出日時 | 2024-10-26 00:30:28 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 2,159 bytes |
| コンパイル時間 | 960 ms |
| コンパイル使用メモリ | 82,432 KB |
| 実行使用メモリ | 239,656 KB |
| 最終ジャッジ日時 | 2024-10-26 00:32:19 |
| 合計ジャッジ時間 | 92,838 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | WA * 3 |
| other | WA * 13 TLE * 21 -- * 3 |
ソースコード
n=int(input())
a=list(map(int,input().split()))
M=998244353
q=[(a[i],i) for i in range(n)]
q.sort()
p=[[] for i in range(n+1)]
tl=1<<20
def update(p,x):
while p<tl:
st[p]+=x
p+=p&(-p)
return
def getsum(p):
a=0
while p>0:
a+=st[p]
p-=p&(-p)
return a
st=[0]*tl
for v,i in q[::-1]:
update(i+1,1)
ok=i
ng=-1
while abs(ok-ng)>1:
m=(ok+ng)//2
l=m
r=i
if getsum(r+1)-getsum(l)==1:
ok=m
else:
ng=m
L=ok
ok=i
ng=n
while abs(ok-ng)>1:
m=(ok+ng)//2
l=i
r=m
if getsum(r+1)-getsum(l)==1:
ok=m
else:
ng=m
R=ok
p[i]+=[(L,i,v)]
p[R+1]+=[(L,i,pow(v,M-2,M))]
st=[0]*tl
for v,i in q:
update(i+1,1)
ok=i
ng=-1
while abs(ok-ng)>1:
m=(ok+ng)//2
l=m
r=i
if getsum(r+1)-getsum(l)==1:
ok=m
else:
ng=m
L=ok
ok=i
ng=n
while abs(ok-ng)>1:
m=(ok+ng)//2
l=i
r=m
if getsum(r+1)-getsum(l)==1:
ok=m
else:
ng=m
R=ok
p[i]+=[(L,i,v)]
p[R+1]+=[(L,i,pow(v,M-2,M))]
exit()
ans=0
B=448
st1=[1]*B*B
st2=[B]*B
lt=[1]*B
for y in range(n):
for l,r,v in p[y]:
yl=l//B
yr=r//B
for i in range(yl*B,yl*B+B):
st1[i]*=lt[yl]
st1[i]%=M
lt[yl]=1
for i in range(yr*B,yr*B+B):
st1[i]*=lt[yr]
st1[i]%=M
lt[yr]=1
if yl==yr:
for i in range(l,r+1):
st2[yl]-=st1[i]
st1[i]*=v
st1[i]%=M
st2[yl]+=st1[i]
st2[yl]%=M
else:
for i in range(l,yl*B+B):
st2[yl]-=st1[i]
st1[i]*=v
st1[i]%=M
st2[yl]+=st1[i]
st2[yl]%=M
for i in range(yl+1,yr):
st2[i]*=v
st2[i]%=M
lt[i]=v
for i in range(yr*B,r+1):
st2[yr]-=st1[i]
st1[i]*=v
st1[i]%=M
st2[yr]+=st1[i]
st2[yr]%=M
g=0
l=0
r=y
yl=l//B
yr=r//B
for i in range(yl*B,yl*B+B):
st1[i]*=lt[yl]
st1[i]%=M
lt[yl]=1
for i in range(yr*B,yr*B+B):
st1[i]*=lt[yr]
st1[i]%=M
lt[yr]=1
if yl==yr:
g+=sum(st1[l:r+1])
else:
g+=sum(st1[l:yl*B+B])
g+=sum(st2[yl+1:yr])
g+=sum(st1[yr*B:r+1])
ans+=g
ans%=M
print(ans)
sasa8uyauya