結果

問題 No.1300 Sum of Inversions
ユーザー 已经死了
提出日時 2024-06-27 20:20:50
言語 PyPy3
(7.3.15)
結果
AC  
実行時間 923 ms / 2,000 ms
コード長 5,454 bytes
コンパイル時間 507 ms
コンパイル使用メモリ 81,920 KB
実行使用メモリ 194,268 KB
最終ジャッジ日時 2024-06-27 20:21:18
合計ジャッジ時間 26,879 ms
ジャッジサーバーID
(参考情報)
judge5 / judge2
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 34
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

import os,sys,random,threading
#sys.exit() 退
from random import randint,choice,shuffle
#randint(a,b)[a,b]
#choice(seq)seq,,seq
#shuffle(x)x
from copy import deepcopy
from io import BytesIO,IOBase
from types import GeneratorType
from functools import lru_cache,reduce
#reduce(op,)
from bisect import bisect_left,bisect_right
#bisect_left(x) x
#bisect_right(x) x
from collections import Counter,defaultdict,deque
from itertools import accumulate,combinations,permutations
#accumulate(a)alist[0]
#combinations(a,k)ak
#permutations(a,k)ak
from heapq import heapify,heappop,heappush
#heapify
from typing import Generic,Iterable,Iterator,TypeVar,Union,List
from string import ascii_lowercase,ascii_uppercase,digits
#
from math import ceil,floor,sqrt,pi,factorial,gcd,log,log10,log2,inf
#ceilfloor sqrt factorial
from decimal import Decimal,getcontext
#Decimal(s) Decimal,使
#getcontext().prec=100
from sys import stdin, stdout, setrecursionlimit
input = lambda: sys.stdin.readline().rstrip("\r\n")
MI = lambda :map(int,input().split())
li = lambda :list(MI())
ii = lambda :int(input())
mod = int(1e9 + 7) #998244353
inf = int(1e20)
py = lambda :print("YES")
pn = lambda :print("NO")
DIRS = [(0, 1), (1, 0), (0, -1), (-1, 0)] #
DIRS8 = [(0, 1), (1, 1), (1, 0), (1, -1), (0, -1), (-1, -1), (-1, 0),(-1, 1)] # →↘↓↙←↖↑↗
import os,sys,random,threading
#sys.exit() 退
#sys.setrecursionlimit(10**6) #
from random import randint,choice,shuffle
#randint(a,b)[a,b]
#choice(seq)seq,,seq
#shuffle(x)x
from copy import deepcopy
from io import BytesIO,IOBase
from types import GeneratorType
from functools import lru_cache,reduce
#reduce(op,)
from bisect import bisect_left,bisect_right
#bisect_left(x) x
#bisect_right(x) x
from collections import Counter,defaultdict,deque
from itertools import accumulate,combinations,permutations
#accumulate(a)alist[0]
#combinations(a,k)ak
#permutations(a,k)ak
from heapq import heapify,heappop,heappush
#heapify
from typing import Generic,Iterable,Iterator,TypeVar,Union,List
from string import ascii_lowercase,ascii_uppercase,digits
#
from math import ceil,floor,sqrt,pi,factorial,gcd,log,log10,log2,inf
#ceilfloor sqrt factorial
from decimal import Decimal,getcontext
#Decimal(s) Decimal,使
#getcontext().prec=100
from sys import stdin, stdout, setrecursionlimit
input = lambda: sys.stdin.readline().rstrip("\r\n")
MI = lambda :map(int,input().split())
li = lambda :list(MI())
ii = lambda :int(input())
mod = int(1e9 + 7) #998244353
inf = 1<<60
py = lambda :print("YES")
pn = lambda :print("NO")
DIRS = [(0, 1), (1, 0), (0, -1), (-1, 0)] #
DIRS8 = [(0, 1), (1, 1), (1, 0), (1, -1), (0, -1), (-1, -1), (-1, 0),(-1, 1)] # →↘↓↙←↖↑↗
class BIT:
""","""
__slots__ = "size", "bit", "tree"
def __init__(self, n: int):
self.size = n
self.bit = n.bit_length()
self.tree = [0]*(n+1)
def add(self, index: int, delta: int) -> None:
# index 0
while index <= self.size:
self.tree[index]+=delta
index += index & -index
def _query(self, index: int) -> int:
res = 0
while index > 0:
res += self.tree[index]
index -= index & -index
return res
def query(self, left: int, right: int) -> int:
return self._query(right) - self._query(left - 1)
def bisectLeft(self, k: int) -> int:
"""kpos
1 <= pos <= self.size + 1
"""
curSum, pos = 0, 0
for i in range(self.bit, -1, -1):
nextPos = pos + (1 << i)
if nextPos <= self.size and curSum + self.tree[nextPos] < k:
pos = nextPos
curSum += self.tree[pos]
return pos + 1
n=ii()
a=li()
d=sorted(set(a))
d={x:i+1 for i,x in enumerate(d)}
lc=[0]*n
ls=[0]*n
rc=[0]*n
rs=[0]*n
bc=BIT(len(d)+5)
bs=BIT(len(d)+5)
for i in range(n):
lc[i]=bc.query(d[a[i]]+1,len(d)+2)
ls[i]=bs.query(d[a[i]]+1,len(d)+2)
bc.add(d[a[i]],1)
bs.add(d[a[i]],a[i])
bc=BIT(len(d)+5)
bs=BIT(len(d)+5)
for i in range(n-1,-1,-1):
rc[i]=bc._query(d[a[i]]-1)
rs[i]=bs._query(d[a[i]]-1)
bc.add(d[a[i]],1)
bs.add(d[a[i]],a[i])
mod=998244353
res=0
#print(lc,rc,ls,rs)
for i in range(1,n-1):
res+=a[i]*lc[i]*rc[i]+ls[i]*rc[i]+rs[i]*lc[i]
res%=mod
print(res)
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