1024 : 수열의 합 [C++]

#include <iostream>

#include <vector>

using namespace std;

class Sequence
{
private:
 vector<int> Vector;
 int N;
 int L;
public:
 Sequence(int n, int l);
 void GetSequence();
};

Sequence::Sequence(int n, int l)
{
 this->N = n;
 this->L = l;
 for (int i = 0; i < 100; i++)
  this->Vector.push_back(0);
}

void Sequence::GetSequence()
{
 if (this->N % 2 == 1 && this->L <= 2)
 {
  this->Vector[0] = this->N / 2;
  this->Vector[1] = this->Vector[0] + 1;

  cout << this->Vector[0] << " " << this->Vector[1] << " ";
 }
 else
 {
  int Count = 0;
  bool IsOk = false;

  for (int i = 2; i <= 100; i++)
  {
   if (this->N < i)
    break;
   int Center = this->N / i;
   int Sum = Center;
   Count = 0;
   IsOk = false;
   for (int j = 1; j <= ((i % 2 == 0) ? (i / 2) - 1 : i / 2); j++)
   {
    if (Center - j >= 0)
    {
     Sum += Center - j;
     this->Vector[Count++] = Center - j;
    }
    else break;
   }
   this->Vector[Count++] = Center;
   for (int j = 1; j <= i / 2; j++)
   {
    Sum += Center + j;
    this->Vector[Count++] = Center + j;
   }
   if (Sum == this->N && Count >= this->L)
   {
    IsOk = true;
    break;
   }
  }
  if (!IsOk)
   cout << "-1";
  else
  {
   int i = 0;
   int j = 0;

   if (Count % 2 == 0)
   {
    i = (Count / 2) - 2;
    j = (Count / 2) - 1;
   }
   else
   {
    i = (Count / 2) - 1;
    j = (Count / 2);
   }

   for (; i >= 0; i--)
    cout << this->Vector[i] << " ";
   for (; j < Count; j++)
    cout << this->Vector[j] << " ";
  }
 }
}

int main()
{
 int N, L;
 cin >> N >> L;

 Sequence S(N, L);

 S.GetSequence();
}

-----------------------간단한 방법------------------------

for (int l = L; l < 100; l++) 

{
 int end = N / l + l / 2;
 int start = end - l + 1;

 if (start < 0) continue;
 else if (end > N) continue;
 else if (N * 2 == end*(end + 1) - start*(start - 1)) 

        {
  for(int i = start; i < end; i++)

                    cout << i << " ";
  return 0;
 }
}

 cout << -1 << endl;