diff --git a/best-time-to-buy-and-sell-stock/jun0811.js b/best-time-to-buy-and-sell-stock/jun0811.js
new file mode 100644
index 0000000000..e2e41c5bf9
--- /dev/null
+++ b/best-time-to-buy-and-sell-stock/jun0811.js
@@ -0,0 +1,11 @@
+var maxProfit = function (prices) {
+  let minPrice = prices[0];
+  let maxProfit = 0;
+
+  for (let i = 1; i < prices.length; i++) {
+    minPrice = Math.min(minPrice, prices[i]);
+    maxProfit = Math.max(maxProfit, prices[i] - minPrice);
+  }
+
+  return maxProfit;
+};
diff --git a/group-anagrams/jun0811.js b/group-anagrams/jun0811.js
new file mode 100644
index 0000000000..26275e0771
--- /dev/null
+++ b/group-anagrams/jun0811.js
@@ -0,0 +1,21 @@
+/**
+ * @param {string[]} strs
+ * @return {string[][]}
+ */
+var groupAnagrams = function (strs) {
+  const hashMap = new Map();
+  const res = [];
+  strs.forEach((str, index) => {
+    const sortedStr = [...str].sort().join('');
+    if (hashMap.has(sortedStr)) {
+      hashMap.set(sortedStr, [...hashMap.get(sortedStr), index]);
+    } else {
+      hashMap.set(sortedStr, [index]);
+    }
+  });
+  for (const [key, values] of hashMap) {
+    const anagrams = values.map((v) => strs[v]);
+    res.push(anagrams);
+  }
+  return res;
+};