title: How To Turn Off A Particular Bit In A Number
signature: int howToTurnOffAParticularBitInANumber(int n, int k) {
test_code: #include <algorithm>
  #include <assert.h>
  #include <cstdlib>
  #include <iostream>
  #include <map>
  #include <set>
  #include <string>
  #include <tuple> 
  #include <unordered_map>
  #include <vector>
  #include <math.h>
  #include <cmath>
  #include <bits/stdc++.h>
  #include <numeric>
  #include <functional>
  
  using namespace std;
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  bool validateSolution(int actual, int expected){
      return actual == expected;
  }
  
  string driver(int n, int k, int expected){
      try
      {
          if (validateSolution(PLACEHOLDER_FN_NAME(n, k), expected)){
              return "PASSED";
          }
          return "FAILED";
      }
      catch (const std::overflow_error& exception_obj)
      {
          return typeid(exception_obj).name();
      }
      catch (const std::runtime_error& exception_obj)
      {
          return typeid(exception_obj).name();
      }
      catch (const std::exception& exception_obj)
      {
          return typeid(exception_obj).name();
      }
      catch (...)
      {
          return "UNK_ERROR";
      }
  }
  
  int main() {
      string result = "";
  
      result = driver(49, 15, 49); 
      cout << "TEST-" << 0 << "..."
           <<  result
           << "\n";
  
      result = driver(59, 69, 59); 
      cout << "TEST-" << 1 << "..."
           <<  result
           << "\n";
  
      result = driver(76, 20, 76); 
      cout << "TEST-" << 2 << "..."
           <<  result
           << "\n";
  
      result = driver(27, 76, 27); 
      cout << "TEST-" << 3 << "..."
           <<  result
           << "\n";
  
      result = driver(61, 60, 61); 
      cout << "TEST-" << 4 << "..."
           <<  result
           << "\n";
  
      result = driver(67, 27, 67); 
      cout << "TEST-" << 5 << "..."
           <<  result
           << "\n";
  
      result = driver(63, 71, 63); 
      cout << "TEST-" << 6 << "..."
           <<  result
           << "\n";
  
      result = driver(85, 25, 85); 
      cout << "TEST-" << 7 << "..."
           <<  result
           << "\n";
  
      result = driver(90, 64, 90); 
      cout << "TEST-" << 8 << "..."
           <<  result
           << "\n";
  
      result = driver(24, 55, 24); 
      cout << "TEST-" << 9 << "..."
           <<  result
           << "\n";
  
      return 0;
  }
source_py: def how_to_turn_off_a_particular_bit_in_a_number(n, k):
      if (k <= 0):
          return n
      return (n & (~ (1 << (k - 1))))
source_cpp: int how_to_turn_off_a_particular_bit_in_a_number(int n, int k) {
    if ( k <= 0 ) return n;
    return ( n & ~ ( 1 << ( k - 1 ) ) );
  }