From 75b8ca17c9a51aa6df4bbf9162a6af8bcda1923b Mon Sep 17 00:00:00 2001
From: Daria Chakhalian <cde0315@gmail.com>
Date: Sat, 30 May 2026 15:38:43 +0300
Subject: [PATCH 1/2] Solution

---
 src/formatDate.js | 36 +++++++++++++++++++++++++++++++++++-
 1 file changed, 35 insertions(+), 1 deletion(-)

diff --git a/src/formatDate.js b/src/formatDate.js
index 769e27661..4d5ec2780 100644
--- a/src/formatDate.js
+++ b/src/formatDate.js
@@ -8,7 +8,41 @@
  * @returns {string}
  */
 function formatDate(date, fromFormat, toFormat) {
-  // write code here
+  const fromSeparator = fromFormat[fromFormat.length - 1];
+  const toSeparator = toFormat[toFormat.length - 1];
+  const dateParts = date.split(fromSeparator);
+  const obj = {};
+
+  for (let i = 0; i <= 2; i++) {
+    obj[fromFormat[i]] = dateParts[i];
+  }
+
+  if ('YYYY' in obj && toFormat[0].length === toFormat[2].length) {
+    obj['YYYY'] = obj['YYYY'].slice(-2);
+  } else if (+obj['YY'] < 30) {
+    obj['YY'] = '20' + obj['YY'];
+  } else {
+    obj['YY'] = '19' + obj['YY'];
+  }
+
+  const toDateParts = [];
+
+  for (let i = 0; i <= 2; i++) {
+    switch (toFormat[i]) {
+      case 'DD':
+        toDateParts[i] = obj['DD'];
+        break;
+      case 'MM':
+        toDateParts[i] = obj['MM'];
+        break;
+      case 'YYYY':
+      case 'YY':
+        toDateParts[i] = obj['YYYY'] || obj['YY'];
+        break;
+    }
+  }
+
+  return toDateParts.join(toSeparator);
 }
 
 module.exports = formatDate;

From fce1ba2376b369c6be11be0c3dfced16dbb52099 Mon Sep 17 00:00:00 2001
From: Daria Chakhalian <cde0315@gmail.com>
Date: Sat, 30 May 2026 19:02:02 +0300
Subject: [PATCH 2/2] fixed

---
 src/formatDate.js | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/formatDate.js b/src/formatDate.js
index 4d5ec2780..b32f66304 100644
--- a/src/formatDate.js
+++ b/src/formatDate.js
@@ -17,12 +17,12 @@ function formatDate(date, fromFormat, toFormat) {
     obj[fromFormat[i]] = dateParts[i];
   }
 
-  if ('YYYY' in obj && toFormat[0].length === toFormat[2].length) {
+  if (fromFormat.includes('YYYY') && toFormat.includes('YY')) {
     obj['YYYY'] = obj['YYYY'].slice(-2);
-  } else if (+obj['YY'] < 30) {
-    obj['YY'] = '20' + obj['YY'];
-  } else {
-    obj['YY'] = '19' + obj['YY'];
+  }
+
+  if (fromFormat.includes('YY') && toFormat.includes('YYYY')) {
+    obj['YY'] = Number(obj['YY'] < 30) ? '20' + obj['YY'] : '19' + obj['YY'];
   }
 
   const toDateParts = [];