mountain.cpp

#include<iostream>
#include<bits/stdc++.h>
#include<vector>
using namespace std ;

vector<int> peaks_of_mountain(vector<int> arr)
{
    vector<int> result ;
    int i = 1 ; 
    while( i < arr.size() - 1 )
    {
        if(arr[i-1] < arr[i] && arr[i+1] < arr[i])
        {
            result.push_back(i);
        }
        i++;
    }
    return result ;
}
void vector_traversal(vector<int> arr)
{
    for (int i = 0; i < arr.size(); i++)
    {
        cout << "|" << arr[i] << "|";
    }
    cout << endl;
}
int length_of_peak(vector<int> arr , int peak )
{
    int counter = 1 ;
    int i = peak ;
    int j = peak ;
    while( arr[i-1] <= arr[i] )
    {
        counter++ ;
        i-- ;
    }
    while( arr[j+1] <= arr[j] )
    { 
        counter++ ;
        j++ ;
    }
    return counter;
}

int main()
{
    vector<int> arr = {5,6,1,2,3,4,5,4,3,2,0,1,2,3,-2,4};
    vector<int> peaks = peaks_of_mountain(arr);
    vector_traversal(peaks);
    int length = length_of_peak(arr , 6);
    cout<<endl<<length ;
    return 0 ;
}