#!/usr/bin/env python3

# Challenge 071
#
# TASK #1 > Peak Element
# Submitted by: Mohammad S Anwar
# You are given positive integer $N (>1).
#
# Write a script to create an array of size $N with random unique elements
# between 1 and 50.
#
# In the end it should print peak elements in the array, if found.
#
# An array element is called peak if it is bigger than it's neighbour.
#
# Example 1
# Array: [ 18, 45, 38, 25, 10, 7, 21, 6, 28, 48 ]
# Peak: [ 48, 45, 21 ]
# Example 2
# Array: [ 47, 11, 32, 8, 1, 9, 39, 14, 36, 23 ]
# Peak: [ 47, 32, 39, 36 ]

import sys

def peek_elem(n):
    out = []
    if len(n) < 2:
        return out
    if n[0] > n[1]:
        out.append(n[0])
    for i in range(1, len(n) - 1):
        if n[i] > n[i-1] and n[i] > n[i+1]:
            out.append(n[i])
    if n[-1] > n[-2]:
        out.append(n[-1])
    return out

n = list(map(int, sys.argv[1:]))
print(", ".join(map(str, peek_elem(n))))