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solution.ts
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solution.ts
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function maximumSubarraySum (nums: number[], k: number): number {
let result = 0;
const set = new Set<number>();
const map = new Map<number, number>();
let sum = 0;
for (let i = 0; i < nums.length; i++) {
if (map.has(nums[i])) {
const lastIndex = map.get(nums[i]);
let index = i - set.size;
while (index <= lastIndex) {
set.delete(nums[index]);
map.delete(nums[index]);
sum -= nums[index];
index++;
}
}
set.add(nums[i]);
map.set(nums[i], i);
sum += nums[i];
if (set.size === k) {
result = Math.max(result, sum);
sum -= nums[i - k + 1];
set.delete(nums[i - k + 1]);
map.delete(nums[i - k + 1]);
}
}
return result;
}