/
isMountain.js
33 lines (27 loc) · 727 Bytes
/
isMountain.js
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/*
Let's call an array A a mountain if the following properties hold:
A.length >= 3
There exists some 0 < i < A.length - 1 such that A[0] < A[1] < ... A[i-1] < A[i] > A[i+1] > ... > A[A.length - 1]
Given an array that is definitely a mountain, return any i such that A[0] < A[1] < ... A[i-1] < A[i] > A[i+1] > ... > A[A.length - 1].
Example 1:
Input: [0,1,0]
Output: 1
Example 2:
Input: [0,2,1,0]
Output: 1
Note:
3 <= A.length <= 10000
0 <= A[i] <= 10^6
A is a mountain, as defined above.
*/
//Answer//
/**
* @param {number[]} A
* @return {number}
*/
var peakIndexInMountainArray = function(A) {
for (let i = 1; i < A.length ; i++) {
if(A[i]>A[i-1]&&A[i]>A[i+1]){return i;
break;}
}
};