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Commit 6a8088b

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Solve #263
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‎src/lib.rs

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@@ -208,3 +208,4 @@ mod n0242_valid_anagram;
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mod n0257_binary_tree_paths;
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mod n0258_add_digits;
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mod n0260_single_number_iii;
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mod n0263_ugly_number;

‎src/n0263_ugly_number.rs

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/**
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* [263] Ugly Number
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*
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* Write a program to check whether a given number is an ugly number.
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*
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* Ugly numbers are positive numbers whose prime factors only include 2, 3, 5.
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*
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* Example 1:
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*
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*
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* Input: 6
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* Output: true
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* Explanation: 6 = 2 × 3
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*
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* Example 2:
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*
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*
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* Input: 8
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* Output: true
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* Explanation: 8 = 2 × 2 × 2
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*
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*
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* Example 3:
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*
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*
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* Input: 14
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* Output: false
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* Explanation: 14 is not ugly since it includes another prime factor 7.
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*
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*
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* Note:
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*
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* <ol>
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* 1 is typically treated as an ugly number.
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* Input is within the 32-bit signed integer range: [-2^31, 2^31 - 1].
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* </ol>
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*/
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pub struct Solution {}
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// submission codes start here
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impl Solution {
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pub fn is_ugly(num: i32) -> bool {
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if num <= 0 {
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false
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} else if num == 1 {
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true
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} else if num % 5 == 0 {
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Solution::is_ugly(num/5)
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} else if num % 3 == 0 {
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Solution::is_ugly(num/3)
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} else if num % 2 == 0 {
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Solution::is_ugly(num/2)
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} else {
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false
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}
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}
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}
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// submission codes end
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_263() {
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assert_eq!(Solution::is_ugly(25), true);
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}
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}

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