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/*
Challenge 204
Task 1: Monotonic Array
Submitted by: Mohammad S Anwar
You are given an array of integers.
Write a script to find out if the given array is Monotonic. Print 1 if it is otherwise 0.
An array is Monotonic if it is either monotone increasing or decreasing.
Monotone increasing: for i <= j , nums[i] <= nums[j]
Monotone decreasing: for i <= j , nums[i] >= nums[j]
Example 1
Input: @nums = (1,2,2,3)
Output: 1
Example 2
Input: @nums = (1,3,2)
Output: 0
Example 3
Input: @nums = (6,5,5,4)
Output: 1
*/
#include <iostream>
#include <vector>
int is_monotonic(const std::vector<int>& data) {
if (data.size() < 2)
return 1;
else {
int climb = 0, descend = 0;
for (size_t i = 0; i < data.size() - 1; i++) {
int delta = data[i+1]-data[i];
if (delta > 0) climb++;
else if (delta < 0) descend++;
if (climb && descend) return 0;
}
return 1;
}
}
int main(int argc, char* argv[]) {
argv++; argc--;
std::vector<int> data;
for (int i = 0; i < argc; i++)
data.push_back(atoi(argv[i]));
std::cout << is_monotonic(data) << std::endl;
}
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