diff --git a/solution/0200-0299/0219.Contains Duplicate II/Solution.js b/solution/0200-0299/0219.Contains Duplicate II/Solution.js
new file mode 100644
index 000000000000..bf68ed04ea3e
--- /dev/null
+++ b/solution/0200-0299/0219.Contains Duplicate II/Solution.js	
@@ -0,0 +1,15 @@
+/**
+ * @param {number[]} nums
+ * @param {number} k
+ * @return {boolean}
+ */
+var containsNearbyDuplicate = function(nums, k) {
+    const d = new Map();
+    for (let i = 0; i < nums.length; ++i) {
+        if (d.has(nums[i]) && i - d.get(nums[i]) <= k) {
+            return true;
+        }
+        d.set(nums[i], i);
+    }
+    return false;
+};
diff --git a/solution/1500-1599/1574.Shortest Subarray to be Removed to Make Array Sorted/Solution.js b/solution/1500-1599/1574.Shortest Subarray to be Removed to Make Array Sorted/Solution.js
new file mode 100644
index 000000000000..bb65c90f1e9c
--- /dev/null
+++ b/solution/1500-1599/1574.Shortest Subarray to be Removed to Make Array Sorted/Solution.js	
@@ -0,0 +1,41 @@
+/**
+ * @param {number[]} arr
+ * @return {number}
+ */
+var findLengthOfShortestSubarray = function(arr) {
+    const n = arr.length;
+        let i = 0, j = n - 1;
+
+        while (i + 1 < n && arr[i] <= arr[i + 1]) {
+            i++;
+        }
+
+        while (j - 1 >= 0 && arr[j - 1] <= arr[j]) {
+            j--;
+        }
+
+        if (i >= j) {
+            return 0;
+        }
+
+        let ans = Math.min(n - i - 1, j);
+
+        for (let l = 0; l <= i; l++) {
+            const r = bisectLeft(arr, arr[l], j, n);
+            ans = Math.min(ans, r - l - 1);
+        }
+
+        return ans;
+};
+
+let bisectLeft = (arr, x, lo, hi)=>{
+        while (lo < hi) {
+            const mid = Math.floor((lo + hi) / 2);
+            if (arr[mid] < x) {
+                lo = mid + 1;
+            } else {
+                hi = mid;
+            }
+        }
+        return lo;
+}
diff --git a/solution/1800-1899/1861.Rotating the Box/Solution.js b/solution/1800-1899/1861.Rotating the Box/Solution.js
new file mode 100644
index 000000000000..9cb07c66a2d1
--- /dev/null
+++ b/solution/1800-1899/1861.Rotating the Box/Solution.js	
@@ -0,0 +1,32 @@
+/**
+ * @param {character[][]} box
+ * @return {character[][]}
+ */
+var rotateTheBox = function(box) {
+    const m = box.length;
+        const n = box[0].length;
+        const ans = Array.from({ length: n }, () => Array(m).fill(null));
+        
+        for (let i = 0; i < m; i++) {
+            for (let j = 0; j < n; j++) {
+                ans[j][m - i - 1] = box[i][j];
+            }
+        }
+        
+        for (let j = 0; j < m; j++) {
+            const q = [];
+            for (let i = n - 1; i >= 0; i--) {
+                if (ans[i][j] === '*') {
+                    q.length = 0; 
+                } else if (ans[i][j] === '.') {
+                    q.push(i);
+                } else if (q.length > 0) {
+                    ans[q.shift()][j] = '#';
+                    ans[i][j] = '.';
+                    q.push(i); 
+                }
+            }
+        }
+        
+        return ans;
+};
diff --git a/solution/3000-3099/3011.Find if Array Can Be Sorted/Solution.js b/solution/3000-3099/3011.Find if Array Can Be Sorted/Solution.js
new file mode 100644
index 000000000000..cf9552ee8e88
--- /dev/null
+++ b/solution/3000-3099/3011.Find if Array Can Be Sorted/Solution.js	
@@ -0,0 +1,33 @@
+/**
+ * @param {number[]} nums
+ * @return {boolean}
+ */
+var canSortArray = function(nums) {
+    let preMx = 0;
+    const n = nums.length;
+    for (let i = 0; i < n; ) {
+        const cnt = bitCount(nums[i]);
+        let j = i + 1;
+        let [mi, mx] = [nums[i], nums[i]];
+        while (j < n && bitCount(nums[j]) === cnt) {
+            mi = Math.min(mi, nums[j]);
+            mx = Math.max(mx, nums[j]);
+            j++;
+        }
+        if (preMx > mi) {
+            return false;
+        }
+        preMx = mx;
+        i = j;
+    }
+    return true;
+};
+
+const bitCount = (i) => {
+    i = i - ((i >>> 1) & 0x55555555);
+    i = (i & 0x33333333) + ((i >>> 2) & 0x33333333);
+    i = (i + (i >>> 4)) & 0x0f0f0f0f;
+    i = i + (i >>> 8);
+    i = i + (i >>> 16);
+    return i & 0x3f;
+}
diff --git a/solution/3100-3199/3163.String Compression III/Solution.js b/solution/3100-3199/3163.String Compression III/Solution.js
new file mode 100644
index 000000000000..9b08e0d39f6f
--- /dev/null
+++ b/solution/3100-3199/3163.String Compression III/Solution.js	
@@ -0,0 +1,22 @@
+/**
+ * @param {string} word
+ * @return {string}
+ */
+var compressedString = function(word) {
+    const ans = [];
+    const n = word.length;
+    for (let i = 0; i < n;) {
+        let j = i + 1;
+        while (j < n && word[j] === word[i]) {
+            ++j;
+        }
+        let k = j - i;
+        while (k) {
+            const x = Math.min(k, 9);
+            ans.push(x + word[i]);
+            k -= x;
+        }
+        i = j;
+    }
+    return ans.join('');
+};