Tanvir is building a dashboard for a hospital's records desk that must support both live value updates and fast range-sum queries.
What your program reads
Line1: N Q. Line2: N integers. Next Q lines: update or query.
What your program prints
Answer for each query op.
Limits
1 ≤ N,Q ≤ 10^5
Example input
5 2 1 2 3 4 5 Q 1 5 Q 2 4
Expected output
15 9
main.c
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