#665233 (PyPy3) No.1439 Let's Compare!!!!

• 問題: No.1439 Let's Compare!!!!
• ユーザー: persimmon-persimmon
• 提出日時: 2021-06-10 09:24:41
• 言語: PyPy3 (7.3.15)
• 結果: WA
• 実行時間: -
• コード長: 1,195 bytes
• コンパイル時間: 587 ms
• コンパイル使用メモリ: 82,792 KB
• 実行使用メモリ: 91,892 KB
• 最終ジャッジ日時: 2024-11-29 14:41:16
• 合計ジャッジ時間: 3,086 ms
• ジャッジサーバーID （参考情報）: judge4 / judge3

ファイルパターン	結果
sample	AC * 2
other	AC * 2 WA * 4 RE * 11

ソースコード

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# 0-indexed binary indexed tree
class BIT:
  def __init__(self, n):
    self.n = n
    self.data = [0]*(n+1)
    self.el = [0]*(n+1)
  # sum of [0,i) sum(a[:i])
  def sum(self, i):
    if i==0:return 0
    s = 0
    while i > 0:
      s += self.data[i]
      i -= i & -i
    return s
  def add(self, i, x):
    i+=1
    self.el[i] += x
    while i <= self.n:
      self.data[i] += x
      i += i & -i
  # sum of [l,r)   sum(a[l:r])
  def sumlr(self, i, j):
    return self.sum(j) - self.sum(i)
  # a[i]
  def get(self,i):
    i+=1
    return self.el[i]
n=int(input())
s=input()
sary=list(map(int,list(s)))
s=int(s)
t=input()
tary=list(map(int,list(t)))
t=int(t)
q=int(input())
query=[input() for _ in range(q)]
dary=[x-y for x,y in zip(sary,tary)]
bit=BIT(n)
for i,x in enumerate(dary):
  bit.add(i,x)
for tmp in query:
  c,x,y=tmp.split()
  x=int(x)
  y=int(y)
  pre=dary[x-1]
  if c=="S":
    sary[x-1]=y
  else:
    tary[x-1]=y
  dary[x-1]=sary[x-1]-tary[x-1]
  bit.add(x-1,-pre+dary[x-1])
  l,r=0,n+1
  while r-l>1:
    x=(r+l)//2
    if bit.sum(x)!=0:
      l,r=l,x
    else:
      l,r=x,r
  tmp=bit.sum(l+1)
  if tmp==0:
    print("=")
  elif tmp<0:
    print("<")
  else:
    print(">")
 
 
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