Simulation | Looping Concept
Intuition\nThe problem likely involves decoding a ciphertext represented in a certain pattern. We need to understand how the ciphertext is encoded to decode it 
# Intuition\nThe problem likely involves decoding a ciphertext represented in a certain pattern. We need to understand how the ciphertext is encoded to decode it properly.\n\n# Approach\n1. Calculate the number of columns based on the size of the ciphertext and the given number of rows.\n2. Iterate over each column and append characters to the answer string according to the specified pattern.\n3. Remove trailing spaces from the decoded ciphertext.\n4. Return the decoded ciphertext.\n\n# Complexity\n- Time complexity: $$O(n)$$, where n is the size of the ciphertext.\n- Space complexity: $$O(n)$$, where n is the size of the ciphertext.\n\n# Code\n```cpp\nclass Solution {\npublic:\n    string decodeCiphertext(string et, int rows) {\n        ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);\n        int cols = et.size() / rows;  \n        string ans = "";\n        for(int i = 0; i < cols; i++) \n            for(int a = 0; a < rows and (a + i) < cols; a++) \n                ans.push_back(et[a * cols + a + i]); \n        while(!ans.empty() and ans.back() == \' \') ans.pop_back();\n        return ans;\n    }\n};\n```
['String', 'Simulation', 'C++']