diff --git a/Day-17/Q1:Determine if two strings are close/kalpana--cpp.md b/Day-17/Q1:Determine if two strings are close/kalpana--cpp.md
new file mode 100644
index 00000000..92a1f4bd
--- /dev/null
+++ b/Day-17/Q1:Determine if two strings are close/kalpana--cpp.md	
@@ -0,0 +1,40 @@
+class Solution {
+ public:
+  bool closeStrings(string word1, string word2) {
+    if (word1.length() != word2.length())
+      return false;
+
+    unordered_map<char, int> count1;
+    unordered_map<char, int> count2;
+    string s1;           
+    string s2;           
+    vector<int> freqs1;  
+    vector<int> freqs2;  
+
+    for (const char c : word1)
+      ++count1[c];
+
+    for (const char c : word2)
+      ++count2[c];
+
+    for (const auto& [c, freq] : count1) {
+      s1 += c;
+      freqs1.push_back(freq);
+    }
+
+    for (const auto& [c, freq] : count2) {
+      s2 += c;
+      freqs2.push_back(freq);
+    }
+
+    ranges::sort(s1);
+    ranges::sort(s2);
+
+    if (s1 != s2)
+      return false;
+
+    ranges::sort(freqs1);
+    ranges::sort(freqs2);
+    return freqs1 == freqs2;
+  }
+};
\ No newline at end of file
diff --git a/Day-21/q2 : Container With Most Water/kalpana--python.md b/Day-21/q2 : Container With Most Water/kalpana--python.md
new file mode 100644
index 00000000..d9218ce9
--- /dev/null
+++ b/Day-21/q2 : Container With Most Water/kalpana--python.md	
@@ -0,0 +1,18 @@
+class Solution(object):
+    def maxArea(self, height):
+        """
+        :type height: List[int]
+        :rtype: int
+        """
+        left = 0
+        right = len(height) - 1
+        distance = right - left
+        max_area = 0
+        while left < right:
+            max_area = max(min(height[left],height[right]) * distance, max_area)
+            if height[left] < height[right]:
+                left += 1
+            else:
+                right -= 1
+            distance -= 1
+        return max_area
\ No newline at end of file
diff --git a/Day-26/q3: Find first and last position of element in sorted array/kalpana--cpp.md b/Day-26/q3: Find first and last position of element in sorted array/kalpana--cpp.md
new file mode 100644
index 00000000..b1a8f1aa
--- /dev/null
+++ b/Day-26/q3: Find first and last position of element in sorted array/kalpana--cpp.md	
@@ -0,0 +1,16 @@
+class Solution {
+public:
+    vector<int> searchRange(vector<int>& nums, int target) {
+    vector<int> ans(2,-1);
+    if(nums.size()==0)return ans;
+    int t1=lower_bound(nums.begin(),nums.end(),target)-nums.begin();
+    int t2=upper_bound(nums.begin(),nums.end(),target)-nums.begin();
+    if(t1==t2)return ans;
+    cout<<t1<<t2;
+    ans[0]=t1;
+    ans[1]=t2-1;
+    return ans;
+    }
+};
+       
+ 
\ No newline at end of file