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/**
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 * @param {number[]} nums
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 * @param {number[][]} queries
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 * @return {number[]}
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 */
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var sumEvenAfterQueries = function (nums, queries) {
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  let sumEven = 0,
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    ans = [];
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  for (let i = 0; i < nums.length; i++) {
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    if (nums[i] % 2 == 0) sumEven += nums[i];
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  }
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  for (let [val, idx] of queries) {
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    if (nums[idx] % 2 == 0) {
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      if (val % 2 == 0) sumEven += val;
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      else sumEven -= nums[idx];
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    } else {
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      // odd + odd
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      if (val % 2 !== 0) sumEven += nums[idx] + val;
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    }
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    nums[idx] += val;
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    ans.push(sumEven);
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  }
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  return ans;
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};