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Find politeness of a number in java
The numbers which can be expressed as the sum of positive consecutive integers are known as polite numbers.
Ex: 5 = 2+3
The number of ways a number can be expressed as the sum of positive integers will be the Politeness of that number.
Ex: 9 = 4+5 || 2+3+4
Algorithm
- Get the prime factors of a number.
- Get the powers of prime factors greater than 2.
- Add 1 to all of them.
- Multiply them, subtract 1 from the result.
Program
import java.util.Scanner;
public class PolitenessOfANumber {
public static void main(String args[]) {
Scanner sc = new Scanner(System.in);
System.out.println("Enter a number");
int num = sc.nextInt();
int count = 0, result = 1;
for(int i = 2; i< num; i++) {
while(num%i == 0) {
System.out.println(i+" ");
num = num/i;
if(i>2) {
count ++;
}
result = result*(count+1);
}
if(num >2) {
System.out.println(num);
}
System.out.println("Politeness of the given number is : "+(result-1));
}
}
}
Output
Enter a number 216 2 2 2 3 3 3 Politeness of the given number is : 3
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