168. Excel Sheet Column Title
Given a positive integer, return its corresponding column title as appear in an Excel sheet.
For example:
1 -> A 2 -> B 3 -> C ... 26 -> Z 27 -> AA 28 -> AB ...
Example 1:
Input: 1 Output: "A"
Example 2:
Input: 28 Output: "AB"
Example 3:
Input: 701 Output: "ZY"
Rust Solution
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());
}
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