Find Peak Element

class Solution {
public:
    int findPeakElement(vector<int>& nums) {
        int len = nums.size();
        if(len == 1) return 0;
        int index = len/2;
        int left = 0,right = len-1;

        while(index >= left && index <= right){

            if(index == left ){
                cout<<"==left"<<index<<endl;
                if(nums[index] > nums[index+1])
                    return index;
                else{
                    index++;
                    continue; // notice the continue
                } 
            }

            if(index == right ){
                if(nums[index] > nums[index-1])
                    return index;
                else{
                   index--;
                   continue; // notice the continue
                }
              }

            if(nums[index] >= nums[index-1] && nums[index] <= nums[index+1]){
                index++;
            }
            else if(nums[index] <= nums[index-1] && nums[index] >= nums[index+1]){
                index--;
            }
            else if(nums[index] <= nums[index-1] && nums[index] <= nums[index+1]){
                index--;
            }
            else if(nums[index] >= nums[index-1] && nums[index] >= nums[index+1]){
                return index;
            }
        }

    }
};