Formatted question description: https://leetcode.ca/all/1108.html
1108. Defanging an IP Address (Easy)
Given a valid (IPv4) IP address, return a defanged version of that IP address.
A defanged IP address replaces every period "." with "[.]".
Example 1:
Input: address = "1.1.1.1" Output: "1[.]1[.]1[.]1"
Example 2:
Input: address = "255.100.50.0" Output: "255[.]100[.]50[.]0"
Constraints:
- The given
addressis a valid IPv4 address.
Related Topics:
String
Solution 1.
// OJ: https://leetcode.com/problems/defanging-an-ip-address/
// Time: O(N)
// Space: O(1)
class Solution {
public:
string defangIPaddr(string address) {
string ans;
for (char c : address) {
if (c == '.') ans += "[.]";
else ans += c;
}
return ans;
}
};
Java
class Solution {
public String defangIPaddr(String address) {
address = address.replaceAll("\\.", "[\\.]");
return address;
}
}