feat: 압축-카카오 문제 reduce 활용 풀이 추가

level-2/[3차]-압축&17684&.js

@@ -31,3 +31,25 @@ function solution(msg) {
   }
   return outputs;
 }
+
+// 정답 2 - ssi02014
+function solution(msg) {
+  const result = [];
+  const dict = Array.from({length: 26},(_, i) => String.fromCharCode(65 + i))
+
+  // 시간 복잡도 O(N^2)
+  const lastWordAndCompression = msg.split("").reduce((acc, cur) => {
+    const nextWord = acc + cur;
+    const nextWordIdx = dict.indexOf(nextWord);
+    const prevWordIdx = dict.indexOf(acc);
+
+    if (nextWordIdx !== -1) return acc + cur;
+    dict.push(nextWord);
+
+    if (prevWordIdx !== -1) result.push(prevWordIdx + 1);
+    return cur;
+  }, "");
+
+  result.push(dict.indexOf(lastWordAndCompression) + 1);
+  return result;
+}