title: Turn Off The Rightmost Set Bit
signature: function turnOffTheRightmostSetBit(n) {
test_code: 
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  function convertToString(value) {
      return JSON.stringify(value, function (key, val) {
          if (val instanceof Set) {
              return Array.from(val);
          } return val;});
  }
  
  function validateSolution(actual, expected){
      return convertToString(actual)===convertToString(expected);
  }
  
  function driver(n, expected){
      try{
          if (validateSolution(PLACEHOLDER_FN_NAME(n),expected)){
              return "PASSED";
          }
          return "FAILED";
      } catch (error) {
        return error.name;
      }
      
  }
      
  function main(){
    let result = '';
    result = driver(9, 8);
    console.log(`TEST-0...${result}`);
  
    result = driver(54, 52);
    console.log(`TEST-1...${result}`);
  
    result = driver(60, 56);
    console.log(`TEST-2...${result}`);
  
    result = driver(32, 0);
    console.log(`TEST-3...${result}`);
  
    result = driver(41, 40);
    console.log(`TEST-4...${result}`);
  
    result = driver(64, 0);
    console.log(`TEST-5...${result}`);
  
    result = driver(4, 0);
    console.log(`TEST-6...${result}`);
  
    result = driver(51, 50);
    console.log(`TEST-7...${result}`);
  
    result = driver(57, 56);
    console.log(`TEST-8...${result}`);
  
    result = driver(92, 88);
    console.log(`TEST-9...${result}`);
  
    process.exit(0);
  };
  
  if (require.main === module) {
    main();
  }
source_py: def turn_off_the_rightmost_set_bit(n):
      return (n & (n - 1))
source_cpp: int turn_off_the_rightmost_set_bit(unsigned int n) {
    return n & ( n - 1 );
  }