subsequences Ap, Ap+1,..., Ap+M-1 and Aq, Aq+1,..., Aq+M-1, i.e. F(p, q) = Eo Apti · Aqti- M-1 You should process Q queries. In each query: • You are given two integers pos and val. Change the value of Apos to val. • Then, find the sum S =N-M+1N-M+1 Li=1 Lj=1 F(i, j). Develop a python code that prints a single line containing one integer S % 999000000 Sample Input: 321 321
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