title: Find Sum Even Index Binomial Coefficients 1
signature: findSumEvenIndexBinomialCoefficients1(n) {
test_code: import 'dart:convert';
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  bool validateSolution(int actual, int expected){
      return actual.toString() == expected.toString();
  }
  
  String driver(n, int expected){
      try
      {
          if (validateSolution(PLACEHOLDER_FN_NAME(n), expected)){
              return "PASSED";
          }
          return "FAILED";
      }catch(exception_object){
          return exception_object.runtimeType.toString();
      }
  }
  
  int main() {
  
      print("TEST-0...${driver(
          56, 
          36028797018963968)
      }");
  
      print("TEST-1...${driver(
          28, 
          134217728)
      }");
  
      print("TEST-2...${driver(
          4, 
          8)
      }");
  
      print("TEST-3...${driver(
          24, 
          8388608)
      }");
  
      print("TEST-4...${driver(
          30, 
          536870912)
      }");
  
      print("TEST-5...${driver(
          48, 
          140737488355328)
      }");
  
      print("TEST-6...${driver(
          32, 
          2147483648)
      }");
  
      print("TEST-7...${driver(
          13, 
          4096)
      }");
  
      print("TEST-8...${driver(
          19, 
          262144)
      }");
  
      return 0;
  }
source_py: def find_sum_even_index_binomial_coefficients_1(n):
      return (1 << (n - 1))
source_cpp: int find_sum_even_index_binomial_coefficients_1(int n) {
    return ( 1 << ( n - 1 ) );
  }