shiningflash
diff --git a/Diff for: ‎Competitive Programming Books/C++ - The Complete Reference 4e.pdf
-2.98 MB b/Diff for: ‎Competitive Programming Books/C++ - The Complete Reference 4e.pdf
-2.98 MB
diff --git a/Diff for: ‎Competitive Programming Books/C_the_complete_reference__2000_Herbert_Schildt_.pdf
-5.53 MB b/Diff for: ‎Competitive Programming Books/C_the_complete_reference__2000_Herbert_Schildt_.pdf
-5.53 MB
diff --git a/Diff for: ‎Competitive Programming Books/Greedy Algorithm.ppt
-906 KB b/Diff for: ‎Competitive Programming Books/Greedy Algorithm.ppt
-906 KB
diff --git a/Diff for: ‎Bit_Magic.md renamed to ‎bit_magic.md
+15 b/Diff for: ‎Bit_Magic.md renamed to ‎bit_magic.md
+15
diff --git a/Diff for: ‎Competitive Programming Books/Art_of_Programming_Contest_SE_for_uva.pdf renamed to ‎competitive programming books/Art_of_Programming_Contest_SE_for_uva.pdf b/Diff for: ‎Competitive Programming Books/Art_of_Programming_Contest_SE_for_uva.pdf renamed to ‎competitive programming books/Art_of_Programming_Contest_SE_for_uva.pdf
diff --git a/Diff for: ‎Competitive Programming Books/Competitive Programming 3.pdf renamed to ‎competitive programming books/Competitive Programming 3.pdf b/Diff for: ‎Competitive Programming Books/Competitive Programming 3.pdf renamed to ‎competitive programming books/Competitive Programming 3.pdf
diff --git a/Diff for: ‎Competitive Programming Books/Programming Challenges.pdf renamed to ‎competitive programming books/Programming Challenges.pdf b/Diff for: ‎Competitive Programming Books/Programming Challenges.pdf renamed to ‎competitive programming books/Programming Challenges.pdf
diff --git a/Diff for: ‎Competitive Programming Books/code-complete-2nd-edition-v413hav.pdf renamed to ‎competitive programming books/code-complete-2nd-edition-v413hav.pdf b/Diff for: ‎Competitive Programming Books/code-complete-2nd-edition-v413hav.pdf renamed to ‎competitive programming books/code-complete-2nd-edition-v413hav.pdf
diff --git a/Diff for: ‎Competitive Programming Books/competitive_programming_3.pdf renamed to ‎competitive programming books/competitive_programming_3.pdf b/Diff for: ‎Competitive Programming Books/competitive_programming_3.pdf renamed to ‎competitive programming books/competitive_programming_3.pdf
diff --git a/Diff for: ‎Competitive Programming Books/computer_programming.pdf renamed to ‎competitive programming books/computer_programming.pdf b/Diff for: ‎Competitive Programming Books/computer_programming.pdf renamed to ‎competitive programming books/computer_programming.pdf
diff --git a/Diff for: ‎swap_numbers.md
-13 b/Diff for: ‎swap_numbers.md
-13
diff --git a/Diff for: ‎Choose_Language.md renamed to ‎tricks and resources/Choose_Language.md b/Diff for: ‎Choose_Language.md renamed to ‎tricks and resources/Choose_Language.md
diff --git a/Diff for: ‎Coding_Resources.md renamed to ‎tricks and resources/Coding_Resources.md b/Diff for: ‎Coding_Resources.md renamed to ‎tricks and resources/Coding_Resources.md
diff --git a/Diff for: ‎Coding_Tricks.md renamed to ‎tricks and resources/Coding_Tricks.md b/Diff for: ‎Coding_Tricks.md renamed to ‎tricks and resources/Coding_Tricks.md
diff --git a/Diff for: ‎Common_Resources.md renamed to ‎tricks and resources/Common_Resources.md b/Diff for: ‎Common_Resources.md renamed to ‎tricks and resources/Common_Resources.md
diff --git a/Diff for: ‎Java_Faster_IO.java renamed to ‎tricks and resources/Java_Faster_IO.java b/Diff for: ‎Java_Faster_IO.java renamed to ‎tricks and resources/Java_Faster_IO.java
@@ -205,4 +205,19 @@ flip bit     : S ^= ~(1<<i)
 ```
 ----------------------------
 
+* Swapping of 2 numbers using `XOR`
+
+This method is fast and most effiecient. It doesn’t even require the use of 3rd variable.
+```
+  // A quick way to swap a and b 
+  a ^= b; 
+  b ^= a; 
+  a ^= b;
+  
+  // or you can use
+  a ^= b ^= a ^= b
+```
+
+----------------------------
+
 source: * [geeksforgeeks](https://www.geeksforgeeks.org/bit-tricks-competitive-programming) * [returnzero](https://returnzerooo.wordpress.com/2016/06/30/বিটের-মজা-মজার-বিট)