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class Solution { public: vector<int> searchRange(vector<int>& nums, int target) { vector<int> result = {-1, -1}; int left = binarySearch(nums, target, true); int right = binarySearch(nums, target, false); result[0] = left; result[1] = right; return result; } int binarySearch(vector<int>& nums, int target, bool isSearchingLeft) { int left = 0; int right = nums.size() - 1; int idx = -1; while (left <= right) { int mid = left + (right - left) / 2; if (nums[mid] > target) { right = mid - 1; } else if (nums[mid] < target) { left = mid + 1; } else { idx = mid; if (isSearchingLeft) { right = mid - 1; } else { left = mid + 1; } } } return idx; } };
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