Oneful Pair Problem in Java

In Java programming language, there are various small logical puzzles to solve and one such interesting puzzle is called the Oneful Pair problem. The idea behind it is very easy to understand once we break it down and try to solve the problem.

What is a Oneful Pair?

A pair of numbers (a, b) is known as a Oneful Pair if the following condition is true:

If two numbers satisfy the above formula, then we call them a Oneful Pair.

Example 1: Oneful Pair

Suppose, a = 10 and b = 1;

a + b = 10 + 1 = 11

a x b = 10 x 1 = 10

Total = 11 + 10 = 21 -> The answer is 21 which is not equal to 111.

So, (10, 1) is not a Oneful Pair.

To solve the problem, we need to check whether the formula matches 111.

Example 2: Oneful Pair

Consider a = 1, b = 55 ;

1 + 55 + (1 * 55) = 111.

Hence, (1, 55) is a oneful pair.

Algorithm of Oneful Pair Problem

1. Take two numbers from the user, i.e., a and b.
2. Calculate the total value of the given number using the formula:
   • Add a and b
   • Multiply a and b
   • Add all of these results together
3. Store the final results in a variable i.e. total
4. Now, compare the value in total with 111
5. If the total matches 111,
   • Then, the pair (a, b) is a Oneful Pair
   • Else, the pair (a, b) is not a Oneful Pair
6. Display the result to the user

Oneful Pair Program

Output:

The pair (7, 13) is a Oneful Pair.

Explanation

The above Java program asks the user to enter two numbers and checks whether they form a Oneful Pair or not. Firstly, the Scanner object is created which takes input from the user. The program then calculated a value after receiving the numbers by using the formula a + b + (a x  b).

After that, it compares the result with 111. If the result is equal to 111, the program prints the message which says "the pair is a Oneful Pair" and if it does not match then it prints the message which says "the pair is not a Oneful Pair." To display the outcome the program uses simple and basic input, arithmetic and an if-else statement.

Advantages

• Clear Logic: It uses a simple and clear formula to calculate step by step program.
• Basic Concepts Practice: The code is helpful for the learners to practice arithmetic operations, if-else conditions or input handling.
• Easy to understand: The code is short and straightforward so it is easily understandable by Java learners.

Disadvantages

• Non flexible: The program does not include loops because if the programmer wants to check another formula they must write the code.
• Lacks Advanced Concepts: It does not include loops, arrays, methods or object-oriented programming. Hence, the learner does not get more advanced Java skills.
• Limited Use: The program works only under very few conditions which makes it useful for a small task and not suitable for real-world applications.

Conclusion

The Oneful pair program is a beginner-friendly program that helps new learners to practice basic Java logic and skills such as how to take input, simple calculations and using if-else statements.

It does cover advanced topics of Java but it is still a good starting point to understand how a program processes data and makes decisions. Once the students learn the concept, they can gradually move on to more Java concepts and build stronger programming skills.