LeetCode solutions

1205. Defanging an IP Address

My accepted C++ solution to LeetCode problem 1205, Defanging an IP Address, running in 3ms.

Difficulty: Easy
C++
Runtime 3ms
Memory 7.5MB

By Pranay Mahendrakar
Updated 20 Aug 2026

Read the problem on LeetCode View on GitHub

The problem statement is LeetCode’s and stays on their site. What follows is my accepted solution.

C++

Accepted on LeetCode — runtime 3ms, memory 7.5MB, accepted 2025-12-28.

cpp

class Solution {
public:
    string defangIPaddr(string address) {
        string result;
        for (char c : address) {
            if (c == '.') result += "[.]";
            else result += c;
        }
        return result;
    }
};

Source