Spiraali

#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);

  int n, t;
  cin >> n >> t;

  int mat[n][n];
  int val = 1;

  int minc = 0;
  int minr = 0;

  int maxc = n - 1;
  int maxr = n - 1;

  while (val <= n * n) {
    for (int i = minr; i <= maxr; ++i) {
      mat[i][minc] = val;
      val++;
    }

    for (int i = minc + 1; i <= maxc; ++i) {
      mat[maxr][i] = val;
      ++val;
    }

    for (int i = maxr - 1; i >= minr; --i) {
      mat[i][maxc] = val;
      ++val;
    }

    for (int i = maxc - 1; i >= minc + 1; --i) {
      mat[minr][i] = val;
      ++val;
    }

    ++minc;
    ++minr;
    --maxc;
    --maxr;
  }

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

    cout << mat[y - 1][x - 1] << '\n';
  }

  return 0;
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED

Test 3

Group: 3

Verdict: RUNTIME ERROR