Create 162. Find Peak Element.cpp

Author: yash-1104github

162. Find Peak Element.cpp

@@ -0,0 +1,34 @@
+TC = O (nlogn) 
+class Solution {
+public:
+    int findPeakElement(vector<int>& nums) {
+       int low = 0 , high = nums.size()-1;
+        while(low < high) {
+            int mid = (low + high)/2;
+            if(nums[mid] > nums[mid+1]) high = mid;
+            else low = mid + 1 ;
+        }
+        return low;
+    }
+};
+
+TC  = O (n)
+class Solution {
+public:
+    int findPeakElement(vector<int>& nums) {
+       return max_element(nums.begin() , nums.end()) - nums.begin() ;
+    }
+};
+
+TC = O(n)
+class Solution {
+public:
+    int findPeakElement(vector<int>& nums) {
+        int n = nums.size() , ind = 0;
+        for(int i  = 0; i < n-1 ; i++){
+                if(nums[i] >  nums[i+1] ) return i;            
+        }
+        return n-1;
+    }
+};
+