Spiraali

#include <bits/stdc++.h>

using namespace std;

vector<int> vi;
int n, t;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    cin >> n >> t;

    vi.push_back(0);

    for (int i = 0; i < floor(n/2); ++i) {
        int cur = ((i*(-2)+n)*4)-4;
        vi.push_back(vi.back()+cur);
    }

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

        int up = y-1;
        int bottom = n-y;
        int left = x-1;
        int right = n-x;

        int dist = min(up, min(bottom, min(left, right)));
        int nth = dist+1;

        int result = vi[dist];
        int side = n-(2*dist);

        if (dist == left) {
            cout << result+(y-nth)+1  << endl;
            continue;
        }

        result += side;

        if (dist == bottom) {
            cout << result+(x-nth) << endl;
            continue;
        }

        result += side-1;

        if (dist == right) {
            cout << result+(n-y-dist) << endl;
            continue;
        }

        result += side-1;

        if (dist == up) {
            cout << result+(n-x)-dist << endl;
            continue;
        }
    }
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED

Test 3

Group: 3

Verdict: RUNTIME ERROR