title: Check Whether Arithmetic Progression Can Formed Given Array
signature: function checkWhetherArithmeticProgressionCanFormedGivenArray(arr: Array<number>, n: number): boolean {
source_py: def check_whether_arithmetic_progression_can_formed_given_array(arr, n):
      if (n == 1):
          return True
      arr.sort()
      d = (arr[1] - arr[0])
      for i in range(2, n):
          if ((arr[i] - arr[(i - 1)]) != d):
              return False
      return True
source_cpp: bool check_whether_arithmetic_progression_can_formed_given_array(vector<int> arr, int n) {
    if ( n == 1 ) return true;
    sort(arr.begin(), arr.end());
    int d = arr [ 1 ] - arr [ 0 ];
    for ( int i = 2;
    i < n;
    i ++ ) if ( arr [ i ] - arr [ i - 1 ] != d ) return false;
    return true;
  }
question_info.test_list: [{"idx": 0, "outputs": false, "inputs": {"arr": [1, 4, 16, 64], "n": 4}}, {"idx": 1, "outputs": true, "inputs": {"arr": [0, 4, 8, 12], "n": 4}}, {"idx": 2, "outputs": true, "inputs": {"arr": [-2, 0, 2, 4, 6], "n": 5}}, {"idx": 3, "outputs": true, "inputs": {"arr": [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], "n": 7}}, {"idx": 4, "outputs": true, "inputs": {"arr": [46, 56, 66, 76, 86], "n": 5}}, {"idx": 5, "outputs": false, "inputs": {"arr": [46, 56, 56, 66, 76, 86], "n": 6}}, {"idx": 6, "outputs": false, "inputs": {"arr": [7, 9, 11, 21, 44, 45, 61, 67, 78, 97, 98, 99], "n": 11}}, {"idx": 7, "outputs": false, "inputs": {"arr": [-96, -84, -74, -70, -68, -62, -50, -50, -38, -36, -36, -36, -34, -34, -28, -28, -26, -18, -12, -4, -4, -2, -2, 6, 6, 14, 24, 34, 36, 44, 50, 54, 54, 62, 64, 66, 70, 74, 74, 78, 84, 86], "n": 33}}, {"idx": 8, "outputs": false, "inputs": {"arr": [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1], "n": 33}}, {"idx": 9, "outputs": false, "inputs": {"arr": [1, 3, 5, 11, 14, 15, 15, 17, 18, 19, 20, 20, 22, 32, 33, 35, 36, 37, 39, 44, 45, 46, 51, 54, 57, 58, 61, 61, 63, 64, 67, 69, 70, 70, 79, 82, 86, 89, 92, 93, 95, 99], "n": 40}}]
question_info.entry_cls_name: Solution
question_info.test_code: 
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  function convertToString(value: any): string{
      return JSON.stringify(value, function (key, val) {
          if (val instanceof Set) {
              return Array.from(val);
          } return val;});
  }
  
  function validateSolution(actual: boolean, expected: boolean): boolean {
      return convertToString(actual) === convertToString(expected);
  }
  
  function driver(arr: Array<number>, n: number, expected:boolean): string {
      try{
          if (validateSolution(PLACEHOLDER_FN_NAME(arr, n),expected)){
              return "PASSED";
          }
          return "FAILED";
      } catch (error) {
        return error.name;
      }
      
  }
      
  function main(){
    let result = '';
    result = driver([1, 4, 16, 64], 4, false);
    console.log(`TEST-0...${result}`);
  
    result = driver([0, 4, 8, 12], 4, true);
    console.log(`TEST-1...${result}`);
  
    result = driver([-2, 0, 2, 4, 6], 5, true);
    console.log(`TEST-2...${result}`);
  
    result = driver([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], 7, true);
    console.log(`TEST-3...${result}`);
  
    result = driver([46, 56, 66, 76, 86], 5, true);
    console.log(`TEST-4...${result}`);
  
    result = driver([46, 56, 56, 66, 76, 86], 6, false);
    console.log(`TEST-5...${result}`);
  
    result = driver([7, 9, 11, 21, 44, 45, 61, 67, 78, 97, 98, 99], 11, false);
    console.log(`TEST-6...${result}`);
  
    result = driver([-96, -84, -74, -70, -68, -62, -50, -50, -38, -36, -36, -36, -34, -34, -28, -28, -26, -18, -12, -4, -4, -2, -2, 6, 6, 14, 24, 34, 36, 44, 50, 54, 54, 62, 64, 66, 70, 74, 74, 78, 84, 86], 33, false);
    console.log(`TEST-7...${result}`);
  
    result = driver([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1], 33, false);
    console.log(`TEST-8...${result}`);
  
    result = driver([1, 3, 5, 11, 14, 15, 15, 17, 18, 19, 20, 20, 22, 32, 33, 35, 36, 37, 39, 44, 45, 46, 51, 54, 57, 58, 61, 61, 63, 64, 67, 69, 70, 70, 79, 82, 86, 89, 92, 93, 95, 99], 40, false);
    console.log(`TEST-9...${result}`);
  
  };
  
  main();
question_info.extension: ts
question_info.entry_fn_name: checkWhetherArithmeticProgressionCanFormedGivenArray
question_info.test_case_ids: 0 1 2 3 4 5 6 7 8 9
question_info.commands: tsc --target es2020 --lib es5,dom,es2015,es2020 __FILENAME__
question_info.commands: node __FILENAME__.js