11.搜索插入位置

var searchInsert = function (nums, target) {
    let left = 0, right = nums.length - 1;
    while (left <= right) {
        const mid = (left + right) >> 1;
        if (nums[mid] === target) return mid;
        if (nums[mid] < target) {
            left = mid + 1;
        } else {
            right = mid - 1;
        }
    }
    return left;
};