struct Solution;
impl Solution {
fn convert_to_title(mut n: i32) -> String {
let mut v: Vec<char> = vec![];
while n > 0 {
let x = ((n - 1) % 26) as u8;
let c = (x + b'A') as char;
v.insert(0, c);
n = (n - 1) / 26;
}
v.iter().collect()
}
}
#[test]
fn test() {
assert_eq!(Solution::convert_to_title(701), "ZY".to_string());
}