#include <iostream>
using namespace std;

int main()
{
   int i, j, sum;

   i = 1;
   while (i <= 5)
   {
      sum = 0;
      j = 1;
      while (j <= i)
      {
         sum = sum + j;
         j++;
      }
      cout << sum << ' ';
      i++;
   }
 
 }