diff --git a/JinHaLim/Easy/solution_1021.js b/JinHaLim/Easy/solution_1021.js
new file mode 100644
index 0000000..6d488e6
--- /dev/null
+++ b/JinHaLim/Easy/solution_1021.js
@@ -0,0 +1,25 @@
+/**
+ * @param {string} s
+ * @return {string}
+ */
+var removeOuterParentheses = function(s) {
+    let result = [];
+    let cnt = 0;
+    let openIndex = 0;
+    s.split('').forEach((v,i)=> {
+        if (v === '(') {
+            if (cnt === 0) {
+                openIndex = i;
+            }
+            ++cnt;
+        }
+        if (v === ')') {
+            --cnt;
+        }   
+        if (cnt === 0) {
+            result.push(s.slice(openIndex+1,i));
+        }
+    });
+    return result.join('');
+};
+console.log(removeOuterParentheses("(()())(())"))
\ No newline at end of file
diff --git a/JinHaLim/Easy/solution_1725.js b/JinHaLim/Easy/solution_1725.js
new file mode 100644
index 0000000..0716c76
--- /dev/null
+++ b/JinHaLim/Easy/solution_1725.js
@@ -0,0 +1,18 @@
+/**
+ * @param {number[][]} rectangles
+ * @return {number}
+ */
+var countGoodRectangles = function(rectangles) {
+    let maxLen = 0;
+    return rectangles.reduce((acc,curr) => {
+        let ele = curr[0] < curr[1] ? curr[0]: curr[1];
+        if (maxLen < ele ) {
+            maxLen = ele;
+        }
+        acc.push(ele);
+        return acc;
+    },[]).filter((v) => {
+        return v === maxLen;
+    }).length;
+};
+console.log(countGoodRectangles([[5,8],[3,9],[5,12],[16,5]]))
\ No newline at end of file
diff --git a/JinHaLim/Easy/solution_1844.js b/JinHaLim/Easy/solution_1844.js
new file mode 100644
index 0000000..e6e7d60
--- /dev/null
+++ b/JinHaLim/Easy/solution_1844.js
@@ -0,0 +1,17 @@
+/**
+ * @param {string} s
+ * @return {string}
+ */
+var replaceDigits = function(s) {
+    let arr = s.split('');
+    let result = [];
+    for (let i = 0; i < arr.length; i++) {
+        result.push(arr[i]);
+        if (typeof(+arr[i+1]) === 'number' && i+1 < arr.length ) {
+        result.push(String.fromCharCode(arr[i].charCodeAt() + +(arr[i+1])));
+        i += 1;
+        }
+    }
+    return result.join('');
+};
+console.log(replaceDigits("a1b2c3d4e"))
\ No newline at end of file