diff --git a/C++/m1.cpp b/C++/m1.cpp
index caa5f1c..3296f6c 100644
--- a/C++/m1.cpp
+++ b/C++/m1.cpp
@@ -8,8 +8,7 @@ class Solution
 public:
     bool isPalindrome(string s)
     {
-        int i = 0, j = s.size();
-
+        int i = 0, j = s.size()-1;
         while (i < j)
         {
             if (s[i++] != s[j--])
diff --git a/C++/m3.cpp b/C++/m3.cpp
index d6995fd..720fc18 100644
--- a/C++/m3.cpp
+++ b/C++/m3.cpp
@@ -2,11 +2,11 @@
 
 #include<iostream>
 using namespace std;
-
+  char string1[80];
 char *initialize() {
-  char string[80];
+
 //   string = "hello"
-  char* ptr = string;
+  char* ptr = &string1[0];
   return ptr;
 }
 
@@ -17,6 +17,7 @@ void do_something_with(char* myval){
 main() {
 	cout << "enter value for myval" << endl;
   char *myval = initialize();
+  cout<<"Address is "<<myval<<endl;
   cin >> *myval;
   cout << "Variable intialized" << endl;
   do_something_with(myval);
diff --git a/C++/m3.exe b/C++/m3.exe
new file mode 100644
index 0000000..76b0477
Binary files /dev/null and b/C++/m3.exe differ
diff --git a/C++/m6.cpp b/C++/m6.cpp
index 5524bce..98eb238 100644
--- a/C++/m6.cpp
+++ b/C++/m6.cpp
@@ -4,7 +4,7 @@
 #include<string>
 
 int main(){
-    std :: string s = "Hello World";
+    std :: string s = "Hello World!";
 
     for(int i=0;i < s.length(); i++){
         s[i] = toupper(s[i]);
diff --git a/C++/m6.exe b/C++/m6.exe
new file mode 100644
index 0000000..8b6a6ff
Binary files /dev/null and b/C++/m6.exe differ
diff --git a/C++/s1.cpp b/C++/s1.cpp
index 95629da..2e0b066 100644
--- a/C++/s1.cpp
+++ b/C++/s1.cpp
@@ -6,7 +6,7 @@ using namespace std;
 int reverse(int x) {
     long r=0;                                  
     while(x){
-        r=r*10+x/10;
+        r=r*10+x%10;
         x=x/10;                                   
     }
     return r;
diff --git a/C++/s1.exe b/C++/s1.exe
new file mode 100644
index 0000000..7ea9df7
Binary files /dev/null and b/C++/s1.exe differ
diff --git a/C++/s3.cpp b/C++/s3.cpp
index 854ed28..d7cc895 100644
--- a/C++/s3.cpp
+++ b/C++/s3.cpp
@@ -18,7 +18,6 @@ void ineedj(void) {
 }
 
 main() {
-  int j;
   j = foo(i);
   ineedj();
 }
diff --git a/C++/s3.exe b/C++/s3.exe
new file mode 100644
index 0000000..619903a
Binary files /dev/null and b/C++/s3.exe differ
diff --git a/C++/s4.exe b/C++/s4.exe
new file mode 100644
index 0000000..3d4c3dc
Binary files /dev/null and b/C++/s4.exe differ
diff --git a/C++/s5.cpp b/C++/s5.cpp
index 3c05697..a51a3e3 100644
--- a/C++/s5.cpp
+++ b/C++/s5.cpp
@@ -5,9 +5,16 @@ using namespace std;
 int main(void){
     string string1 = "Hello";
     string string2 = "Horld";
-
-    if (string1 == string2)
-    cout << "Equal";
-    else
-    cout << "Not Equal";
+    int i, flag=1;
+	for(i=0;i<5;i++)
+	{
+    if (string1[i] != string2[i])
+		flag=0;
+}
+	if(flag==0)
+	{
+		cout<<"Not eual";
+	}
+	else
+	cout<<"Eual";
 }
diff --git a/C++/s5.exe b/C++/s5.exe
new file mode 100644
index 0000000..b473747
Binary files /dev/null and b/C++/s5.exe differ
diff --git a/Python/s1.py b/Python/s1.py
index e4fbd9f..db08927 100644
--- a/Python/s1.py
+++ b/Python/s1.py
@@ -12,4 +12,4 @@
     	letter_count += 1
 
 print("Letters:", letter_count)
-print("Digits:", digit_count)
+print("Digits:", digit_count)
\ No newline at end of file
diff --git a/Python/s4.py b/Python/s4.py
index c33f313..225f7b2 100644
--- a/Python/s4.py
+++ b/Python/s4.py
@@ -3,10 +3,10 @@
 def is_power_of_two(n):
     if n <= 0:
         return False
-    return (n & (n-1)) == 1
+    return (n & (n-1)) == 0
 
 
-num = 69
+num = 5
 if is_power_of_two(num):
     print(num, "is a power of 2")
 else:
diff --git a/Python/s5.py b/Python/s5.py
index 64bc40c..8606eeb 100644
--- a/Python/s5.py
+++ b/Python/s5.py
@@ -1,9 +1,9 @@
 # Program: How are you doing?
 
 answer1 = input("Are you enjoying Vashisht? ([Y]es/[N]o) ")
-if answer1.lower() == "y" or "yes":
+if answer1.lower() == "y" or answer1.lower()=="yes":
     print("That's great! We hope you're having fun hunting for bugs.")
-elif answer1.lower() == "n" or "no":
+elif answer1.lower() == "n" or answer1.lower()=="no":
     print(":( We're sorry to hear that. We hope you'll have fun soon.")
 else:
     print("404 Not Found!")
@@ -11,9 +11,9 @@
 print()
 
 answer2 = input("Do you want me to print bugs for all Python files? ;) ([Y]es/[N]o) ")
-if answer2.lower() == "y" or "yes":
+if answer2.lower() == "y" or answer2.lower()=="yes":
     print("Nice try :P")
-elif answer2.lower() == "n" or "no":
+elif answer2.lower() == "n" or answer2.lower()=="no":
     print("That's the spirit!")
 else:
     print("404 Not Found!")