struct Solution;
impl Solution {
fn new_integer(mut n: i32) -> i32 {
let mut res = 0;
let mut base = 1;
while n > 0 {
res += n % 9 * base;
n /= 9;
base *= 10;
}
res
}
}
#[test]
fn test() {
let n = 9;
let res = 10;
assert_eq!(Solution::new_integer(n), res);
}