fix: add cstdint header to all files using fixed width integers

backtracking/subarray_sum.cpp

@@ -14,6 +14,7 @@
  */
 
 #include <cassert>        /// for assert
+#include <cstdint>
 #include <iostream>       /// for IO operations
 #include <unordered_map>  /// for unordered_map
 #include <vector>         /// for std::vector

backtracking/subset_sum.cpp

@@ -10,6 +10,7 @@
  */
 
 #include <cassert>   /// for assert
+#include <cstdint>
 #include <iostream>  /// for IO operations
 #include <vector>    /// for std::vector
 

backtracking/wildcard_matching.cpp

@@ -12,6 +12,7 @@
  */
 
 #include <cassert>   /// for assert
+#include <cstdint>
 #include <iostream>  /// for IO operations
 #include <vector>    /// for std::vector
 

bit_manipulation/count_bits_flip.cpp

@@ -20,6 +20,7 @@
  * @author [Yash Raj Singh](https://github.com/yashrajyash)
  */
 #include <cassert>   /// for assert
+#include <cstdint>
 #include <iostream>  /// for IO operations
 /**
  * @namespace bit_manipulation

bit_manipulation/count_of_set_bits.cpp

@@ -16,6 +16,7 @@
  * @author [Prashant Thakur](https://github.com/prashant-th18)
  */
 #include <cassert>   /// for assert
+#include <cstdint>
 #include <iostream>  /// for IO operations
 /**
  * @namespace bit_manipulation

bit_manipulation/count_of_trailing_ciphers_in_factorial_n.cpp

@@ -18,6 +18,7 @@
  */
 
 #include <cassert>   /// for assert
+#include <cstdint>
 #include <iostream>  /// for IO operations
 
 /**

bit_manipulation/hamming_distance.cpp

@@ -13,6 +13,7 @@
  */
 
 #include <cassert>   /// for assert
+#include <cstdint>
 #include <iostream>  /// for io operations
 
 /**

bit_manipulation/next_higher_number_with_same_number_of_set_bits.cpp

@@ -16,6 +16,7 @@
  */
 
 #include <cassert>   /// for assert
+#include <cstdint>
 #include <iostream>  /// for IO operations
 
 /**

bit_manipulation/power_of_2.cpp

@@ -16,6 +16,7 @@
  */
 
 #include <cassert>   /// for assert
+#include <cstdint>
 #include <iostream>  /// for IO operations
 
 /**

bit_manipulation/set_kth_bit.cpp

@@ -19,6 +19,7 @@
  */
 
 #include <cassert>   /// for assert
+#include <cstdint>
 #include <iostream>  /// for IO operations
 
 /**

bit_manipulation/travelling_salesman_using_bit_manipulation.cpp

@@ -22,6 +22,7 @@
  */
 #include <algorithm>  /// for std::min
 #include <cassert>    /// for assert
+#include <cstdint>
 #include <iostream>   /// for IO operations
 #include <limits>     /// for limits of integral types
 #include <vector>     /// for std::vector

ciphers/base64_encoding.cpp

@@ -13,6 +13,7 @@
  */
 #include <array>     /// for `std::array`
 #include <cassert>   /// for `assert` operations
+#include <cstdint>
 #include <iostream>  /// for IO operations
 
 /**

ciphers/hill_cipher.cpp

@@ -35,6 +35,7 @@
 
 #include <cassert>
 #include <cmath>
+#include <cstdint>
 #include <cstring>
 #include <ctime>
 #include <fstream>

ciphers/uint128_t.hpp

@@ -8,6 +8,7 @@
  */
 
 #include <algorithm>  /// for `std::reverse` and other operations
+#include <cstdint>
 #include <ostream>    /// for `std::cout` overload
 #include <string>     /// for `std::string`
 #include <utility>    /// for `std::pair` library

cpu_scheduling_algorithms/fcfs_scheduling.cpp

@@ -11,6 +11,7 @@
 
 #include <algorithm>      /// for sorting
 #include <cassert>        /// for assert
+#include <cstdint>
 #include <cstdlib>        /// random number generation
 #include <ctime>          /// for time
 #include <iomanip>        /// for formatting the output

data_structures/dsu_path_compression.cpp

@@ -19,6 +19,7 @@
  */
 
 #include <cassert>   /// for assert
+#include <cstdint>
 #include <iostream>  /// for IO operations
 #include <vector>    /// for std::vector
 

data_structures/dsu_union_rank.cpp

@@ -20,6 +20,7 @@
  */
 
 #include <cassert>   /// for assert
+#include <cstdint>
 #include <iostream>  /// for IO operations
 #include <vector>    /// for std::vector