// Computer Programming, XB_40011, Fall 2018
// Vrije Universiteit, Amsterdam
//
// (GRADED) Assignment 3.3 "Second smallest"
//
// Submit this assignment to Canvas!
// By doing so you declare to comply to the regulations as stated
// on the page on "Ethical behaviour and fraud" in the course's
// Canvas site.
//
// Student name   : Mateusz Belka
// Student number : 2637578
// VUnet-id       : mba325
//
// Fill in your details above,
// then enter your code below this header.
//
#include<iostream>
#include<vector>
#include<algorithm>

using namespace std;

int main()
{
  //Vars
  vector<int> list;
  int listEle;
  int listEleTmp;

  //Question
  cout << "Enter the numbers in random order: (close by entering q)" << endl;
  //FIXME: Check the order of operations in while loop.
  //FIXME: You might be able to not need the next if statement and pop_back stuff
  while (!cin.fail()) //Detects if non-int is entered
  {
    cin >> listEle;
    list.push_back(listEle);
  }
  if (cin.fail()) //Gets rid of unwanted non-int entrance to vector
  {
    cin.clear();
    list.pop_back();
  }

  //Sorting from lowest to highest
  sort(list.begin(), list.end());

  //Check if second smallest exists
  //FIXME: make sure its the best method of going about this problem
  if (list.size() > 1) //inside of if statement will fail in case of list with 0 or 1 element
  {
    listEleTmp = list.at(0);
    for (int i = 0; i < list.size() - 1; ++i)
    {
      if (list.at(i) != list.at(i + 1))
      {
        listEleTmp = list.at(i);
      }
    }
    if (list.at(list.size() - 1 != list.at(list.size() - 2)))
    {
      listEleTmp = list.at(list.size() - 1);
    }
  }
  else
  {
    cout << "error: no second smallest";
    return 0;
  }

  //Print
  if (listEleTmp == list.at(0)){
    cout << "error: no second smallest";
  }
  else
  {
    //FIXME: make a loop that checks for same same variables so no fake second smallest is created
    if (list.at(0) == list.at(1))
    {
      cout << "The second smallest number is " << list.at(2);
    }
    else
    {
      cout << "The second smallest number is " << list.at(1);
    }
  }
  return 0;
}