Submission #6976243

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Source Code Expand

use std::collections::HashSet;

fn main() {
    let num = read().trim().parse().unwrap();
    let mut a: HashSet<u32> = vec!().into_iter().collect();
     
    for i in 0..num {
        a.insert(read().trim().parse().unwrap());
    }

    println!("{}", a.len());
}

fn read() -> String {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s);
    s
}

Submission Info

Compile Error

warning: unused variable: `i`, #[warn(unused_variables)] on by default
 --> ./Main.rs:7:9
  |
7 |     for i in 0..num {
  |         ^

warning: unused result which must be used, #[warn(unused_must_use)] on by default
  --> ./Main.rs:16:5
   |
16 |     std::io::stdin().read_line(&mut s);
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Judge Result