Spiraali

#include <iostream>
//#include <chrono>

using namespace std;

int main()
{
    long n, t, x, y, r, iar, b, ns;
	cin >> n;
	cin >> t;
    long results[1000];
    ns = n * n;
    //auto start = std::chrono::steady_clock::now();

	for (int j = 0; j < t; j++)
	{
        cin >> y;
        cin >> x;

        r = 0;
        if (y > x)
        {
            if (x <= n - y)
            {
                r = x;
            }
            else
            {
                r = n - y + 1;
            }
        }
        else
        {
            if (y <= n - x)
            {
                r = y;
            }
            else
            {
                r = n - x + 1;
            }
        }
        //cout << endl << "ring: " << r << endl;
                
        iar = n - (r - 1) * 2;
        b = ns - iar * iar + 1;
       
        if (x == r)
        {
            results[j] = b + y - r;
        }
        else if (y == n - r + 1)
        {
            results[j] = b + iar - 1 + x - r;
        }
        else if (x == n - r + 1)
        {
            results[j] = b + iar * 2 - 2 + n - y - r + 1;
        }
        else if (y == r)
        {
            results[j] = b + iar * 3 - 3 + n - x - r + 1;
        }
        else
        {
            cout << "umm.. error: x: " << x << " y: " << y << endl;
            cout << "ring: " << r << endl;
            cout << "begin: " << b << endl;
            return 1;
        } 
	}


    for (int i = 0; i < t; i++)
    {
        cout << results[i] << endl;
    }


    //auto end = std::chrono::steady_clock::now();
    //std::chrono::duration<double> elapsed_seconds = end - start;
    //std::cout << "elapsed time to compute: " << elapsed_seconds.count() << "s\n";

    return 0;
} 

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED

Test 3

Group: 3

Verdict: ACCEPTED