Create file

Author: bugsweeper

168-ExcelSheetColumnTitle/168-ExcelSheetColumnTitle.rs

@@ -0,0 +1,16 @@
+use std::collections::VecDeque;
+
+const ABC_LEN: i32 = (b'Z' - b'A' + 1) as i32;
+
+impl Solution {
+    pub fn convert_to_title(column_number: i32) -> String {
+        let mut column_number = column_number - 1;
+        let mut result = VecDeque::with_capacity(7);
+        while column_number >= 0 {
+            let letter = (column_number % ABC_LEN) as u8 + b'A';
+            result.push_front(letter);
+            column_number = column_number / ABC_LEN - 1;
+        }
+        unsafe{String::from_utf8_unchecked(result.into())}
+    }
+}