Sum of Even Numbers After Queries

arraysimulation

Problem Statement

You are given an integer array nums and an array queries where queries[i] = [val _i , index _i ] .

For each query i , first, apply nums[index _i ] = nums[index _i ] + val _i , then print the sum of the even values of nums .

Return an integer array answer where answer[i] is the answer to the i ^th query .

Examples

Example 1

Input: nums = [1,2,3,4], queries = [[1,0],[-3,1],[-4,0],[2,3]]
Output: [8,6,2,4]
At the beginning, the array is [1,2,3,4].
After adding 1 to nums[0], the array is [2,2,3,4], and the sum of even values is 2 + 2 + 4 = 8.
After adding -3 to nums[1], the array is [2,-1,3,4], and the sum of even values is 2 + 4 = 6.
After adding -4 to nums[0], the array is [-2,-1,3,4], and the sum of even values is -2 + 4 = 2.
After adding 2 to nums[3], the array is [-2,-1,3,6], and the sum of even values is -2 + 6 = 4.

Example 2

Input: nums = [1], queries = [[4,0]]
Output: [0]

Constraints

1 <= nums.length <= 10 ^4

-10 ^4 <= nums[i] <= 10 ^4

1 <= queries.length <= 10 ^4

-10 ^4 <= val _i <= 10 ^4

0 <= index _i < nums.length

🤔

Medium

Difficulty

Topic Info

ModuleDSA

CategoryArray

Sub-topicSimulation