diff --git a/app/src/main/java/com/leetcode_kotlin/Executing.kt b/app/src/main/java/com/leetcode_kotlin/Executing.kt
index e1f02088..9ca2eb96 100644
--- a/app/src/main/java/com/leetcode_kotlin/Executing.kt
+++ b/app/src/main/java/com/leetcode_kotlin/Executing.kt
@@ -1,7 +1,5 @@
 package com.leetcode_kotlin
 
-import java.util.concurrent.ConcurrentHashMap
-
 
 /**
  * Executing
@@ -10,10 +8,6 @@ import java.util.concurrent.ConcurrentHashMap
 
 fun main() {
 
-    val concurrentHashMap = ConcurrentHashMap<Int, Int>()
-
-    concurrentHashMap.put(1, 5)
-
 
 }
 
diff --git a/contest/src/main/java/com/github/contest/Execute.kt b/contest/src/main/java/com/github/contest/Execute.kt
index 39684a79..5c9e14a8 100644
--- a/contest/src/main/java/com/github/contest/Execute.kt
+++ b/contest/src/main/java/com/github/contest/Execute.kt
@@ -1,6 +1,7 @@
 package com.github.contest
 
 
+import com.github.contest.bitManipulation.hammingWeight
 import com.github.contest.math.numberOfPowerfulInt
 import com.github.contest.slidingWindow.customStructure.rabinKarpMultiPattern
 import com.github.contest.slidingWindow.customStructure.slidingWindowClassic
@@ -15,9 +16,7 @@ import java.util.TreeMap
 
 fun main() {
 
-    val str = "abcdefrt"
-
-    str.chunked(3).also { println(it) }
+    val str: String? = "ghdirfghdi"
 
 }
 
diff --git a/contest/src/main/java/com/github/contest/bitManipulation/BitManipulationLeetcode.kt b/contest/src/main/java/com/github/contest/bitManipulation/BitManipulationLeetcode.kt
index e3a63857..2b75f210 100644
--- a/contest/src/main/java/com/github/contest/bitManipulation/BitManipulationLeetcode.kt
+++ b/contest/src/main/java/com/github/contest/bitManipulation/BitManipulationLeetcode.kt
@@ -22,4 +22,36 @@ fun subsetXORSum(nums: IntArray): Int {
 
     calculateSubsetXOR(0, 0)
     return totalXORSum
+}
+
+/**
+ * 191. Number of 1 Bits
+ */
+
+fun hammingWeight(n: Int): Int {
+    var num = n
+    var count = 0
+
+    while (num != 0) {
+        count += num and 1
+        num = num ushr 1
+    }
+
+    return count
+}
+
+/**
+ * 461. Hamming Distance
+ */
+
+fun hammingDistance(x: Int, y: Int): Int {
+    var res = x xor y
+    var count = 0
+
+    while (res != 0) {
+        count += res and 1
+        res = res ushr 1
+    }
+
+    return count
 }
\ No newline at end of file
diff --git a/contest/src/main/java/com/github/contest/twoPointer/TwoPointerLeetCode.kt b/contest/src/main/java/com/github/contest/twoPointer/TwoPointerLeetCode.kt
index 6ea85f7d..11f9630a 100644
--- a/contest/src/main/java/com/github/contest/twoPointer/TwoPointerLeetCode.kt
+++ b/contest/src/main/java/com/github/contest/twoPointer/TwoPointerLeetCode.kt
@@ -48,4 +48,22 @@ fun trap(height: IntArray): Int {
     }
 
     return water
+}
+
+/**
+ * 2200. Find All K-Distant Indices in an Array
+ */
+
+fun findKDistantIndices(nums: IntArray, key: Int, k: Int): List<Int> {
+    val result = mutableSetOf<Int>()
+    for (j in nums.indices) {
+        if (nums[j] == key) {
+            val start = maxOf(0, j - k)
+            val end = minOf(nums.size - 1, j + k)
+            for (i in start..end) {
+                result.add(i)
+            }
+        }
+    }
+    return result.sorted()
 }
\ No newline at end of file