#include <iostream>

 using namespace std;

 int number, number2, i, k, cond1, cond2;
int main(int argc, const char * argv[])
 {

	i = 0;
	cout << "Write a sequence" << endl;
	cin >> number;
	while ((i<3) && (number>0))
	{
		cin >> number2;

		if ((i>1) && (number2>number))
		{
			cond2 = 1;
		}
		if ((i>1) && (number2<number))
		{
			cond1 = 1;
		}
		i = i + 2;

		number = number2;

		if ((cond1>0) &&(cond2>0))
		{
			cout << "The sequence is undefined" << endl;
		}

	}

	if ((cond1>0) && (cond2 == 0))
	{
		cout << "The sequence is decreasing" << endl;
	}

	if((cond2>0) && (cond1 == 0))
	{
		cout << "The sequence is increasing" << endl;
	}
	system("pause");
	return 0;
}