# Sum Of Interval #### Try First, Check Solution later

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`You are given an array(of integers) of length n.You are required to answer q queries.Queries can be of two types0. 0 pos val : In this you have to update arr[pos] to val.1. 1 l r: In this query u have to find the sum of all elements in this interval.Sum of elements in interval [l, r] means sum of all arr[i] for which i is in range [l, r].To do the above task u have to create a datastructure as follows :-Implement the SegmentTree class:1. SegmentTree(int arr[]): Initializes the SegmentTree object with an array,2. void update(int pos, int val): updates the arr[pos] to val,3. int query(int l, int r): return sum of all element's in interval [l, r].`
Input Format
`A number nn1n2.. n number of elementsA number qfollowing q lines contains queries of format either of two 0 pos val,1 l r`
Output Format
`for each query print a single integer in seperate line`
Question Video
Constraints
`1. 1 <= n, q <= 10^52. 0 <= l <= r < n3. 10^4 <= arr[i] <= 10^4.`
Sample Input
`4123491 0 30 1 31 0 31 1 20 2 51 2 31 0 11 0 21 1 3`
Sample Output
`1011694912`

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