Spiraali

#include <algorithm>
#include <iostream>
using namespace std;

int main() {
	int n, t;
	cin >> n >> t;

	while (t--) {
		int y, x;
		cin >> y >> x;

		y--;
		x--;

		long k = min({y, n - y - 1, x, n - x - 1});
		long r = k * 4 * (n + 1) - k * (k + 1) * 4;
		long z = n - k * 2 - 1;

		if (x == k) r += y - k;
		else if (y == n - k - 1) r += z + x - k;
		else if (x == n - k - 1) r += z * 2 + n - k - 1 - y;
		else r += z * 3 + n - k - 1 - x;

		cout << r + 1 << endl;
	}
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED

Test 3

Group: 3

Verdict: ACCEPTED