feat: Solve leetcode/leetcoding_challenge/2024/aug2024/weekly/generalized_abbreviation.cpp

Author: htbkoo

src/onlinePlatform/leetcode/leetcoding_challenge/2024/aug2024/weekly/generalized_abbreviation.cpp

@@ -0,0 +1,73 @@
+#include <algorithm>
+#include <vector>
+#include <queue>
+#include <set>
+#include <limits>
+#include <map>
+#include <unordered_set>
+#include <unordered_map>
+#include <iterator>
+#include <sstream>
+#include <iostream> // includes cin to read from stdin and cout to write to stdout
+using namespace std; // since cin and cout are both in namespace std, this saves some text
+
+class Solution {
+public:
+    vector<string> generateAbbreviations(string word) {
+        if (word.size() == 0) {
+            // TODO: confirm this
+            return {};
+        }
+     
+        auto answer = generate(word, 0);
+        return vector<string>(begin(answer), end(answer));
+    }
+    
+private:
+    unordered_set<string> generate(string &word, int i) {
+        if (i >= word.size()) {
+            return {""};
+        }
+        
+        unordered_set<string> answer;
+        
+        int start = i;        
+        while (start < word.size()) {        
+            int headSize = start - i;
+            int abbreviationSize = 1;
+            while (start + abbreviationSize <= word.size()) {
+                string head = word.substr(i, headSize) + to_string(abbreviationSize);
+                if (start + abbreviationSize < word.size()) {
+                    head += word[start + abbreviationSize];
+                }
+
+                for (auto& tail: generate(word, start + abbreviationSize + 1)) {
+
+                    if (head + tail == "1o" || head + tail == "" || i == 2) {
+                        cout << start << ": " << head << "_" << abbreviationSize << "_" << tail << ":" << (start + abbreviationSize + 1) << endl;
+                    }
+
+                    answer.insert(head + tail);
+                }
+
+                abbreviationSize++;
+            }            
+
+            start++;
+            headSize = start - i;
+            string head = word.substr(i, headSize);
+            for (auto& tail: generate(word, start)) {
+
+                if (head + tail == "1o" || head + tail == "" || i == 2) {
+                    cout << start << ": " << head << "_0_" << tail << endl;
+                }
+
+
+                answer.insert(head + tail);
+            }
+        }
+        
+
+        return answer;
+    }
+};