import java.util.Scanner;
public class Main {
public static void main
(String[] args
) {
Scanner sc
= new Scanner
(System.
in); int k = sc.nextInt() ;
int[] nums = {1,2,3,4,5} ;
int sum = 0 ;
int count=0;
for(int i=0;i<nums.length;i++)
{ sum = 0 ;
for(int j=i+1;j<nums.length;j++){
sum = sum+ nums[j] ;
if(sum == k){
count++ ;
}
}}
}
}
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