My Code for this problem in Python.
                        
                        
                        
                        
                        
                            def optimal_summands(n):
                        
                            
                        
                                if n <= 2:
                        
                                    return [n]
                        
                            
                        
                                summands = []
                        
                                remainder = n
                        
                            
                        
                                j = 1
                        
                                while j <= remainder:
                        
                                    remainder -= j
                        
                            
                        
                                    if remainder <= j:
                        
                                        summands.append(remainder + j)
                        
                                        break
                        
                            
                        
                                    summands.append(j)
                        
                                    j += 1
                        
                            
                        
                                return summands
                        
                            
                        
                            
                        
                            if __name__ == '__main__':
                        
                                n = int(input())
                        
                                summands = optimal_summands(n)
                        
                                print(len(summands))
                        
                                print(*summands)
                        
                        
                        
                        
                        
                        
                        
                
             
            
                
                    
                        > Please try this solution, much simpler
                        
                        
                        
                            def optimal_summands(n):
                        
                            
                        
                                if n <= 2:
                        
                                    return [n]
                        
                            
                        
                                summands = []
                        
                                remainder = n
                        
                            
                        
                                j = 1
                        
                                while j <= remainder:
                        
                                    remainder -= j
                        
                            
                        
                                    if remainder <= j:
                        
                                        summands.append(remainder + j)
                        
                                        break
                        
                            
                        
                                    summands.append(j)
                        
                                    j += 1
                        
                            
                        
                                return summands
                        
                            
                        
                            
                        
                            if __name__ == '__main__':
                        
                                n = int(input())
                        
                                summands = optimal_summands(n)
                        
                                print(len(summands))
                        
                                print(*summands)