162. Find-Peak-Element

/**
 * @param {number[]} nums
 * @return {number}
 */
var findPeakElement = function(nums) {
    let left = 0;
    let right = nums.length - 1;
    if(nums.length === 1)
        return 0;
    while(left < right){
        let m = (left + right) >> 1;
        if(nums[m] < nums[m+1])
            left = m + 1;
        else
            right = m 
    }
    return left
};