added problem 985

Author: SHA65536

problems/problem0985/even_query.go

@@ -0,0 +1,35 @@
+package problem0985
+
+/*
+You are given an integer array nums and an array queries where queries[i] = [vali, indexi].
+For each query i, first, apply nums[indexi] = nums[indexi] + vali, then print the sum of the even values of nums.
+Return an integer array answer where answer[i] is the answer to the ith query.
+*/
+
+func sumEvenAfterQueries(nums []int, queries [][]int) []int {
+	var sum int
+	var sums = make([]int, len(queries))
+	// Getting initial sum
+	for i := range nums {
+		if nums[i]%2 == 0 {
+			sum += nums[i]
+		}
+	}
+	for i := range queries {
+		old := nums[queries[i][1]]
+		new := old + queries[i][0]
+		// If the old value is even, we want to
+		// delete it from the sum
+		if old%2 == 0 {
+			sum -= old
+		}
+		// If the new value is even, we want to
+		// add it to the sum
+		if new%2 == 0 {
+			sum += new
+		}
+		nums[queries[i][1]] = new
+		sums[i] = sum
+	}
+	return sums
+}

problems/problem0985/even_query_test.go

@@ -0,0 +1,29 @@
+package problem0985
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+type Result struct {
+	Input    []int
+	Queries  [][]int
+	Expected []int
+}
+
+var Results = []Result{
+	{[]int{1, 2, 3, 4}, [][]int{{1, 0}, {-3, 1}, {-4, 0}, {2, 3}}, []int{8, 6, 2, 4}},
+	{[]int{1}, [][]int{{4, 0}}, []int{0}},
+}
+
+func TestEvenSumAfterQueries(t *testing.T) {
+	assert := assert.New(t)
+
+	for _, res := range Results {
+		want := res.Expected
+		got := sumEvenAfterQueries(res.Input, res.Queries)
+		assert.Equal(want, got, fmt.Sprintf("%+v", res))
+	}
+}

readme.md

@@ -144,6 +144,7 @@ Each problem is in it's own directory, with test files. There are helper package
 | 0967 | [Numbers With Same Consecutive Differences](https://leetcode.com/problems/numbers-with-same-consecutive-differences) | [My Solution](./problems/problem0967) | ✅ |
 | 0968 | [Binary Tree Cameras](https://leetcode.com/problems/binary-tree-cameras) | [My Solution](./problems/problem0968) | ✅ |
 | 0977 | [Squares of a Sorted Array](https://leetcode.com/problems/squares-of-a-sorted-array) | [My Solution](./problems/problem0977) | ✅ |
+| 0985 | [Sum of Even Numbers After Queries](https://leetcode.com/problems/sum-of-even-numbers-after-queries) | [My Solution](./problems/problem0985) | ✅ |
 | 0987 | [Vertical Order Traversal of a Binary Tree](https://leetcode.com/problems/vertical-order-traversal-of-a-binary-tree) | [My Solution](./problems/problem0987) | ✅ |
 | 0994 | [Rotting Oranges](https://leetcode.com/problems/rotting-oranges) | [My Solution](./problems/problem0994) | ✅ |
 | 1009 | [Complement of Base 10 Integer](https://leetcode.com/problems/complement-of-base-10-integer) | [My Solution](./problems/problem1009) | ✅ |