20251204 (#31)

- add: 3-5 문자열 압축

Author: sukyoungshin

src/inflearn_coding_test/basic/3-5_문자열압축.js

@@ -0,0 +1,21 @@
+function solution(str) {
+  let answer = '';
+  let count = 1;
+  str = str + ' '; // 마지막 문자에 대한 처리를 위해 빈 문자 추가 (Sentinel Value)
+
+  for (let i = 0; i < str.length; i++) {
+    const char = str[i];
+    const nextChar = str[i + 1];
+
+    if (char === nextChar) count++;
+    else {
+      answer += char;
+      if (count > 1) answer += String(count);
+      count = 1;
+    }
+  }
+
+  return answer;
+}
+
+console.log(solution('KKHSSSSSSSE')); // K2HS7E