A decimal number is called deci-binary if each of its digits is either 0 or 1 without any leading zeros. For example, 101 and 1100 are deci-binary, while 112 and 3001 are not.
Given a string n that represents a positive decimal integer, return the minimum number of positive deci-binary numbers needed so that they sum up to n.
Example 1:
Input: n = "32" Output: 3 Explanation: 10 + 11 + 11 = 32
Example 2:
Input: n = "82734" Output: 8
Example 3:
Input: n = "27346209830709182346" Output: 9
Constraints:
1 <= n.length <= 105n consists of only digits.n does not contain any leading zeros and represents a positive integer.struct Solution;
impl Solution {
fn min_partitions(n: String) -> i32 {
let mut res = 0;
for b in n.bytes() {
res = res.max(b - b'0');
}
res as i32
}
}
#[test]
fn test() {
let n = "32".to_string();
let res = 3;
assert_eq!(Solution::min_partitions(n), res);
}