Problem:
Score: 200 points

Problem Statement

The number 105 is quite special - it is odd but still it has eight divisors.
Now, your task is this: how many odd numbers with exactly eight positive divisors are there between 1 and N (inclusive)?

Constraints

N is an integer between 1 and 200 (inclusive).

Input

Input is given from Standard Input in the following format:

N

Output

Print the count.

Sample Input 1

105

Sample Output 1

1

Among the numbers between 1 and 105, the only number that is odd and has exactly eight divisors is 105.

Sample Input 2

7

Sample Output 2

0

1 has one divisor. 3, 5 and 7 are all prime and have two divisors. Thus, there is no number that satisfies the condition.

Solution in Rust (1.15.1) (judge verdict: Accepted)

use io::*;

fn main() {
    let con =read_string();
    let mut sc =Scanner::new(&con);

    let n:i32 =sc.next();

    let mut ans:i32 =0;
    for i in 1..n+1{
        if i%2==0{
            continue;
        }
        let mut sum=0;
        for j in 1..i+1{
            if i%j==0{
                sum+=1;
            }
        }
        if sum==8{
            ans+=1;
        }
    }
    println!("{}",ans);
}

pub mod io {
    use std;
    use std::str::FromStr;
 
    pub struct Scanner<'a> {
        iter: std::str::SplitWhitespace<'a>,
    }
 
    impl<'a> Scanner<'a> {
        pub fn new(s: &'a str) -> Scanner<'a> {
            Scanner {
                iter: s.split_whitespace(),
            }
        }
 
        pub fn next<T: FromStr>(&mut self) -> T {
            let s = self.iter.next().unwrap();
            if let Ok(v) = s.parse::<T>() {
                v
            } else {
                panic!("Parse error")
            }
        }
 
        pub fn next_vec_len<T: FromStr>(&mut self) -> Vec<T> {
            let n: usize = self.next();
            self.next_vec(n)
        }
 
        pub fn next_vec<T: FromStr>(&mut self, n: usize) -> Vec<T> {
            (0..n).map(|_| self.next()).collect()
        }
    }
 
    pub fn read_string() -> String {
        use std::io::Read;
 
        let mut s = String::new();
        std::io::stdin().read_to_string(&mut s).unwrap();
        s
    }
 
    pub fn read_line() -> String {
        let mut s = String::new();
        std::io::stdin().read_line(&mut s).unwrap();
        s.trim_right().to_owned()
    }
}