Inversiot

#include <iostream>
#include <iomanip>
#include <string>
#include <vector>
#include <algorithm>

using namespace std;

typedef unsigned int uint;
typedef unsigned long ul;
typedef unsigned long long ull;
typedef long long ll;
typedef long double ld;
#define PI 3.1415926535897932384626433

int main()
{
	ull n = 0, k = 0, a = 0, b = 0, o = 1;
	std::cin >> n;
	std::cin >> k;
	for (ull i = 0; i < n; i++)
	{
		if (a + (n - (i + 1)) <= k)
		{
			a += n - (i + 1);
			cout << n - b << " ";
			b++;
			i++;
		}
		if (i < n)
		{
			cout << o << " ";
			o++;
		}
	}


	int w;
	std::cin >> w;

	return 0;
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: WRONG ANSWER

Test 6

Group: 2

Verdict: ACCEPTED

Test 7

Group: 2

Verdict: ACCEPTED

Test 8

Group: 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: ACCEPTED

Test 10

Group: 2

Verdict: WRONG ANSWER

Test 11

Group: 3

Verdict: ACCEPTED

Test 12

Group: 3

Verdict: ACCEPTED

Test 13

Group: 3

Verdict: ACCEPTED

Test 14

Group: 3

Verdict: ACCEPTED

Test 15

Group: 3

Verdict: WRONG ANSWER