Problems solved: 21
Rank by points: #1365
Total points:
10.83
Contribution points:
2
1 contest written
Rank by rating: #94
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About
lim=n+15
b=[0]*(lim+1)
def upd(i,x):
i+=2
while i<=lim:
b[i]+=x
i+=i&(-i)
def get(i):
i+=2
ans=0
while i>0:
ans+=b[i]
i-=i&(-i)
return ans
def gett(l,r):
return get(r)-get(l-1)
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